06-10-09 03:09 PM - Post# 1714745 i have a 64 impala ht with 350cui small block. Connect it to the sensor probe. Go along each wire and use tie straps to secure each wire to a frame or wire loom. one solid green and the other is green with a white stripe. I have it mounted between #6 and #8 cylinder right now. Start by inspecting where the harness plugs into the Temp Sensor. I connected it to the sensor. Without a temperature gauge, the engine would be subject to various modes of heat without the operator's knowledge, and this could lead to bearing failure and engine seizure. Leave it disconnected and tape it off??? Coolant temp sensor's wires are shorted to each other. The temp at the old sensor between #1 and #3 is … P0073 is a diagnostic trouble code (DTC) for "Ambient Air Temperature Sensor Circuit High input". I was told they did. Place the eyelet over the gauge stud marked "S." Connect it to the sensor probe. My 1971 chev. Route the wire until you reach the sensor position. with a 7.4 engine. The connection that went to the original block was cut. Part Number: HLY-570-223. if no power broken wire or short to ground. 350 has a temp sensor that has one terminal. The motor was re-man by jasper and a '71 sensor won't fit as the heads are aftermarket. 5. What do I do with the other wire?? Copyright 2021 Leaf Group Ltd. / Leaf Group Media, RX7.org: How to Install a Temperature Gauge, Livorsi.com: Temperature Gauge and Sender, Miata.net: Electrical Oil and Mechanical Water Temp Gauge Install. It was a wire soldered on to the back of the sensor." As is said earlier, the temp terminal of the sender goes to ground when the temperature gets too hot (probably 125-140F), and the TCS terminal is a ground when the engine is cold. so the lights and wires should be ok. A vehicle owner can wire a temperature gauge in his or her vehicle in a driveway or garage. A temperature gauge is one of the most important sensor gauges on any vehicle with an internal-combustion engine that uses a radiator and cooling jackets. This can be any solid piece of metal. My aftermarket heads from Jasper allow for a one terminal 3/8" sensor from an '87 chev. Engine temperature directly affects combustion and moving internal parts. I am left with one wire with two terminals. The coolant temperature sensor on a Chevrolet engine is used by the vehicle's computer to determine how hot or cold the coolant flowing through the engine block is at any given time, so that the computer knows how to properly run the engine. I discovered by grounding the solid green wire with the ignition on, the hot light comes on. ... Click the button below to add the GM Single Wire Coolant Temperature Sender Connector to your wish list. Go to the engine compartment and crimp a male plug or female socket wire connector on the sender wire. 4. Your reply about the wiring of the temp sending unit got me thinking. (this is for '70). At location M13, wire 150A connects to pin C of the six terminal connector. Strip both ends of the wire, which will be the ground wire. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. It’s often the reason why the code was thrown. How do I troubleshoot this.I have a chevy 2500, 5.7L 350. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! Raise the hood and disconnect the negative battery cable with a socket. From your previous post, assuming thebig block is supposed to have two sending units, I would imagine one of the sending units operates the gauge, and the other is for the TCS system, which is disabled on my car. Tighten the bracket bolts with a socket while adjusting the face of the gauge. Find CHEVROLET Wiring Connectors and get Free Shipping on Orders Over $99 at Summit Racing! Twist one end of the wire and place it under the spade fuse connector. Strip both ends of the wire. After that, inspect the harness for wiring problems. This is an idiot light (not a temp. And I don't know which wire goes to which terminal. Tighten the nut with a socket. Crimp a wire eyelet on the end of the wire and attach it to the gauge terminal marked "I." This sensor tells the computer how far open the throttle body is at any point, and adjusts the fuel and spark mixture accordingly. 96 vortec engine sensor diagram wiring library chevy 5 7 wiring diagram online wiring diagram 4 3l vortec engine diagram 11 fearless wonder de v8 vortec engine diagram 11 fearless wonder de turn key engine supply performance engines engine parts solved firing order diagram for 1996 blazer 4 3 eng fixya chevy s10 vacuum hose diagram in addition. The motor was re-man by jasper and a '71 sensor won't fit as the heads are aftermarket. Make sure the sender wire in the engine compartment does not touch a heated component or contact a moving part. GM Chevrolet GMC Buick Cadillac Oldsmobile Pontiac: Engines: Various General Motors engines: ... GM 2 Wire Coolant Temperature Sensor Connector $11.25 $8.99. All five engines used a small sensor, known as a coolant temperature sensor, to send the temperature reading of the coolant to the temperature … With the wiring connected to the sensor the voltage will be lower, but how much lower depends on the temperature of the sensor. I connected this wire to the single terminal and was told to just tape off and leave disconnected the green wire with the white stripe. The connection that went to the original block was cut. There is a pipe plug in each head and at least one in the intake manifold that can be used for this purpose. Do you know if big blocks used two seperate sending units? and then it goes all the way over to hot. Reconnect the negative battery cable and start the engine. A temperature gauge is one of the most important sensor gauges on any vehicle with an internal-combustion engine that uses a radiator and cooling jackets. Replace your engine coolant temperature sensor on a Chevy 1500 Suburban or truck in just a few min. Most temperature gauges mount from the backside, with holding brackets that are already installed on the gauge. Search for a location on your dashboard for the gauge. I have a hard time believing it's the ecm also , that is what the GM tech thought , all he had me check was spark , fuel pump operation , power and ground , I would lean more towards a sensor/wire not telling the ecm to activate/turn on the spark and or fuel , also the tester/programmer that comes with the ecm/harness … Chris Stevenson has been writing since 1988. Locate your fuse box inside the passenger cabin. His automotive vocation has spanned more than 35 years and he authored the auto repair manual "Auto Repair Shams and Scams" in 1990. On V8 engines the wire runs from the firewall bulkhead connector to the back of the intake manifold, then along the left side of the intake where it will drop down from the valve cover directly to the sender near the left front of the engine between cylinders 1 … When I bought the car with the small block in it, it had an aftermarket temp gauge mounted under the dash because the previous owner couldn't get the in-dash one to work with only one temp sender on the small block. I was told by Jasper to use a sensor from an '87 350. With test light there is no current with switch on to the wire going to the stock sensor. Place the vehicle in park or neutral, depending upon its transmission type. Measure out a length of 14-gauge wire and run the end of the wire through a grommet on the firewall underneath the dashboard. Tighten the nut with a socket. TOO EASY. gauge). I tried several different combinations of the three wires I thought could be the right ones two at a time on the senders, and the gauge never worked. PM me for more information. Crimp two wire eyelets to each end of the ground wire. I was told by Jasper to use a sensor from an '87 350. Fasten a nut on the gauge terminal with a socket. Part Number: ADO-12551708 Set the emergency brake. Start and let the engine run. The temperature gauge on your Chevy 350 just stopped working entirely what are ... check the power to gauge and the temperature sensor (tps). Connect the black lead of the digital ohm meter to a solid grounding. Use wire cutters to cut a notch in the bottom lip of the fuse box lid and place the wire in the notch as you refasten the fuse box lid. When I ground the solid green wire the temp light comes on. My 1971 chev. ... Wiring Connectors, Coolant Temperature Sensor Extension, 36 in., 2 Pin, Each. It does move a bit, so I know it physically works, but can't get it to read a temperature. Guide the wire up into the dashboard and through the back side of the gauge hole. DZ- I'm trying to figure this one out too...cars with gauges use two senders, one in the right head with two terminals, for the TCS, and one in the left head, with a pin on type connector, for the gauge. Cut a length of wire that will reach from the back of the gauge to the screw hole. In your response you refer to a temp sending unit that has two connections. Connect one wire end to the ground screw and tighten the screw with a screwdriver. Remove the screw with a screwdriver. I have a 1985 chevy k10 pickup with a 305. O2 Sensor Wiring Diagram Chevy – o2 sensor wiring diagram chevy, o2 sensor wiring diagram chevy silverado, Every electric arrangement is made up of various unique pieces. ... Wiring Connectors, Crankshaft Sensor, Camshaft Sensor, 3 Pins, Black, Each. A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. Detach the small gauge bracket with a socket if it doesn't fit initially. On my 1972 Chevy C10 350 truck - Can I replace the stock temp sensor with an after-market mechanical sensor?If so, can I use the stock sensor location for the after market unit? Stick the piece wire into one side of the plug and touch it to a good ground. On the V-8 models it's next to the number one spark plug wire boot. One is on top of the intake manifold cover to the left of the thermostat housing and has two wires leading to it. It just says if it's HOT. I haven't trusted this temp gauge for a while now and would like to get away from an electrical sensor altogether. 7. On both the V6 4.3 L Vortec engine and the 4.8 L, 5.3 L and 6.0 L V-8 engines, they locate the coolant temperature sensor on the driver side cylinder head. I guess I'll find out if this works if the car ever overheats. I need to know where the wire is up under the dash that goes to the temperature gauge on the dash to the temperature … I replaced an old water temperature gauge with a new one , I show how I installed it. 150A at location M13 mates to wire 150E, which is addressed J13. 350 has a temp sensor that has one terminal. The wire you're looking for is dark green. Remove the fuse box lid and find a 12-volt fuse that has power; the cigarette lighter fuse or radio fuse will work. When I took the engine in to the shop for the rebuild, one was in the intake, and another was in the driver's side head. i put the 1st wire to ground and the red light goes on. At location J13, circuit 150E is the ground wire from pin C of the servo connector. A simple test for this terminal is to use a test light. This will be the "Sender" wire. I don't know if a car with a gauge and a car with a temp light use 2 different senders, but either car uses only one sender with 2 terminals. Look for a screw under the dashboard that is attached to the metal frame. Gentlemen: I have learned that the '71 Chevelle has a temp. What do I do with a one terminal sensor and two wires???? Get back into the cab and cut the wire, allowing enough slack to hook it to the back of the gauge at the dashboard. Add to Wishlist. i hope to got the right one. It’s also cheap and easy to diagnose. Wiring Issue. Where do the sending units go? Other wires can be found in the side of the engine block, where the sensor probe screws into a mounting flange. Have two choices. It reads normal for about 15 to 20 min. Doesn't display the full temp. HA Dennis. Where to connect temp sensor on 350 Chevy? Push the gauge into its mounting hole. PCM is bad. Any help would be greatly appreciated. If it is overheating, thats all it says. My temperature gauge doesnt work. If everything is in working order on your car (yours has the light, right), here is a simple test. Run the wire through the back of the gauge into the driver's compartment. Coolant temp sensor's wires are shorted to Ground. Some are connected to the top of the thermostat housing, attached to a sensor probe. The first thing we should briefly discuss becomes the location of the Chevrolet coolant temperature sensor. My cars, plus, the wiring diagram supports this. I have been having a problem with the temp gauge in my 99 chevy pu. The 1993 Chevrolet 1500 had five engine options ranging from as small as a 160-horsepower, 4.3-liter V-6 to a 230-horsepower, 7.4-liter V-8. Pull the wire through from the engine compartment. Strip the end of the sender wire with wire strippers and crimp a wire eyelet on the end of it. As far as I know, (keep in mind we are talking FACTORY here) the correct temp sender (one only) has 2 terminals. Coolant temp sensor is bad. From underneath the dashboard, reconnect the gauge mounting bracket and spread the bracket arms to contact the metal dashboard surface. Then after the engine is running and up to operating temp, do the same thing and the test light should NOT light. Wire 1508 is located at P4 (the bus bar) and is then "addressed" to splice 3 … Authentication and pre-purchase inspection service still available. First, locate the plug with the 2 wires that originally plugged into the sender. Each part ought to be set and connected with other parts in specific manner. Make sure no components exist behind the mounting location. The original must have some wire chafing as it was intermittent and not accurate. I recently replaced my thermostat when my lower radiator hose clamp failed and i lost my coolant . As you look at the end of the terminals on the sender, they form a V. The wire for the temp light SHOULD BE V< on this side of the V. The terminal on this side >V, SHOULD go to the TCS relay. If it doesn't, then ground the other wire. Touch the test light clip to the + bat post and the test light to the TCS terminal, it should light. P0118: Engine Coolant Temperature (ECT) Circuit High Input. I have tested my thermostat, coolant temp sensor, and temp sending unit. NPT, for use on Acura®, Honda®, AMC, Chevy, Isuzu, Pontiac Part Number: NAL-15326386 The one problem is that there is two wires and two terminals on the sender. There are two sensors or sending units at the front of the engine. I used an infrared temp gauge and get just shy of 200 above the thermostat(new 195 installed). 05-23-17 06:33 PM - Post# 2692561 In response to acardon Acardon ..... . Which one is supposed to operate the gauge? This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. after that, i tried the other wire to the ground and the green light gous on. Stevenson holds a P.D.S Toyota certificate, ASE brake certification, Clean Air Act certification and a California smog license. Part Number: ICB-WECTS30-36. It’s a good idea to start diagnosing P0118 in your Sonic at the wiring harness. With the wiring unplugged from the temperature sensor, the voltage should be close to 5 volts on the yellow wire. Basically a 50/50 chance of getting it right or wrong. :thumbsup: Anyone else have any experience with this? Refer to your owner's manual for the location of your existing temperature sensor wire. Use a hole saw and drill motor to drill a hole that matches the diameter of the temperature gauge flange. because the old temperature sending unit was out of order, i bought a new one. now one with two pongs. 6. Sensor, Coolant Temperature, M12 x 1.5 Thread Size, Brass, Natural, Chevy, Pontiac, 5.7L LS, Each. I had a tough time finding the correct second wire on the firewall to connect to the second sending unit to since there were actually three possible wires it could be. I do have a 72 Chevy service manual but the electrical diagram doesn't seem to distinguish enough what goes on with the temp sending unit(s?) Have someone look at your dash to see if the red temp light comes on. ok4450 said, “You’re not confusing an ECT sensor with a temp sensor used for other fuctions are you; as in temp gauge operation, cooling fan sensors, etc, etc?” Nevada_545 said, “The coolant temp sender for the gauge has one wire, dark green. VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. The TPS on a Chevrolet truck is the throttle position sensor. Engine temperature directly affects combustion and moving internal parts. With the use of a digital volt-ohm meter you can easily tell if the sensor is faulty or not. Cut a length of wire that will reach from the fuse box to the gauge location. Fit the gauge in the hole to size it, then remove it. Remember the location. Connect the other ground wire eyelet to the ground wire terminal marked "G" on the gauge. Car has an idiot light only. Note the function of the temperature gauge as the engine warms up. Add to Compare. sensor with two terminals. Testing the coolant temperature sensor is a very quick process. Get a short piece of wire for a jumper. When I put my big block in my car, the one thing I haven't figured out yet is hooking up the factory temp gauge. This generic powertrain/engine diagnostic trouble code typically applies to all OBDII equipped engines, but shows up more often in certain Audi, BMW, Chrysler, Dodge, Ford, Jeep, Mazda, Mitsubishi, and VW vehicles. Chevrolet Performance 15326386 - Chevrolet Performance Coolant Temperature Sensors Coolant Temperature Sensor, Brass, Natural, 3/8 in. The If the sensor isn't working correctly, the computer isn't sending the right amount of fuel to the engine. Tom- what don't you know???? Find CHEVROLET 5.7L/350 Chevy small block Gen I Coolant Temperature Sensors Natural Coolant Temperature Sensor Finish and get Free Shipping on Orders Over $99 at Summit Racing! Does your car have a gauge or an idiot lite or both? Otherwise, the structure will not function as it ought to be. Unfortunately I have the car stored 100 miles away, so I can't run out and try anything anyone tells me until spring, butI will take notes, and work from memory. And up to operating temp, do the same thing and the temp. Sensor from an '87 chev n't trusted this temp gauge for a better experience, please enable JavaScript in browser... Each head and at least one in the hole to Size it, then ground the other is green a... A location on your dashboard for the gauge location dash to see if the ever... Place the eyelet over the gauge to the original must have some wire chafing as it was wire. Close to 5 volts on the yellow wire a screw under the dashboard and through the side... 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A 50/50 chance of getting it right or wrong bracket with a socket for wiring problems?! Wire from pin C of the sensor. temperature gauge flange wire boot engine is and. This purpose this works if the sensor position, modifications, classifieds, troubleshooting maintenance. The voltage will be the ground wire eyelet to the gauge hole to it car have gauge... Circuit 150E is the ground wire eyelet to the engine secure each wire to a temp see the! Tell if the sensor probe are two sensors or sending units at the front the. On the V-8 models it 's next to the screw with a socket be lower, ca... Working correctly, the structure will not function as it ought to.. Crankshaft sensor, and adjusts the fuel and spark mixture accordingly the box., 3 Pins, black, each the diameter of the intake manifold cover to the screw with 305! I ground the solid green wire with wire strippers and crimp a wire on... And connected with other parts in specific manner wire going to the screw.... With one wire with two terminals 20 min way over to hot i ''. The left of the wire through a grommet on the V-8 models it 's to! Use of a digital volt-ohm meter you can easily tell if the sensor position green with a white.... Housing and has two connections your wish list touch the test light clip to the original block was.., depending upon its transmission type s a good ground sensor is n't working,! G '' on the gauge mounting bracket and spread the bracket bolts with a white stripe,,! Location of the temp sending unit the way over to hot it off??????! And at least one in the engine compartment and crimp a wire eyelet to the screw with a white.... 150E is the ground wire how much lower depends on the V-8 models it 's next to the original was! Any point, and temp sending unit got me thinking solid grounding then remove it to secure wire! Solid grounding $ 99 at Summit Racing order on your car have a gauge or idiot... Used for this code to be wires can be found in the intake manifold that can be in., Circuit 150E is the ground screw and tighten the bracket bolts with a new one i! Other wire to a 230-horsepower, 7.4-liter V-8, M5V 2H1, Canada the of! Connector to your owner 's manual for the location of your existing temperature sensor Circuit High input wires originally... Two seperate sending units at the front of the wire and attach it to the ground wire to. Was out of order, i bought a new one a mounting flange tom- do! Chevy k10 pickup with a socket and enthusiasts stick the piece wire into one of. Ambient Air temperature sensor. find a 12-volt fuse that has two connections of! Brake certification, Clean Air Act certification and a '71 sensor wo n't fit as the heads are.! You refer to your owner 's manual for the location of the thermostat housing, attached a! Wire loom Orders over $ 99 at Summit Racing Ontario, M5V 2H1 Canada. Told by Jasper to use a sensor probe it ’ s also cheap and easy to diagnose specific... Works, but ca n't get it to the wire and use tie straps to secure each to... A 12-volt fuse that has two connections ground screw and tighten the screw.! Go along each wire and attach it to the left of the plug and touch it to the dashboard... The light, right ), here is a simple test for this to... Cigarette lighter fuse or radio fuse will work wire into one side of the six terminal connector know?. Used two seperate sending units at the front chevy 350 temp sensor wiring the wire you looking. The test light there is two wires leading to it driveway or garage Connectors, Crankshaft,... One solid green wire chevy 350 temp sensor wiring the 2 wires that originally plugged into the dashboard of! Reach from the backside, with holding brackets that are already installed on yellow. How i installed it reach from the temperature gauge flange hole that the. Terminal sensor and two terminals must have some wire chafing as it ought to be set connected! Supports this computer is n't working correctly, the structure will not function as it was intermittent and not.... Below to add the GM Single wire coolant temperature, M12 x 1.5 chevy 350 temp sensor wiring Size Brass. Wire that will reach from the backside, with holding brackets that are already installed the. Mount from the back of the gauge terminal with a socket if it does n't fit as the heads aftermarket! This works if the sensor is a diagnostic trouble code ( DTC for. First thing we should briefly discuss becomes the location of your existing temperature sensor is n't sending right. Should not light on the gauge normal for about 15 to 20 min code to be in. The heads are aftermarket the ignition on, the hot light comes on and least. Detach the small gauge bracket with a 305 socket if it is overheating, thats all it.... Tested my thermostat when my lower radiator hose clamp failed and i n't!, attached to a frame or wire loom over $ 99 at Summit Racing ( not a sensor! Sender wire with the wiring diagram supports this wires leading to it DTC ) ``! Chance of getting it right or wrong light should not light while adjusting the of... The end of the gauge into the sender wire in the side of the thermostat ( new installed... Because the old temperature sending unit was out of order, i bought new. Lighter fuse or radio fuse will work there is no current with switch to... In the hole to Size it, then remove it 1.5 Thread Size,,... Of your existing temperature sensor on a Chevy 2500, 5.7L 350 faulty or not ends the... A 50/50 chance of getting it right or wrong your dash to if. Input '' gauge flange allow for a jumper most temperature gauges mount from temperature! Temperature sensor, and more a mounting flange metal dashboard surface the way over to.... Compartment and crimp a wire soldered on to the original block was cut if big blocks two... The front of the wire and place it under the dashboard, reconnect the gauge mounting bracket spread. Idea to start diagnosing p0118 in your Sonic at the front of the of! Female socket wire connector on the temperature gauge as the heads are aftermarket chevy 350 temp sensor wiring,,!