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View Full Version : Coolant temp sensor question.


Twiglet240
06-07-2013, 03:57 AM
My coolant temp sensor has a black ground wire and a blue w/brown stripe wire going to it. I believe these are the correct wires. I can see the guy before me hacked the wires at one point. Is it possible to wire the sensor backwards? It looks like it only pugs into the harness one way?

OnTheChip
06-07-2013, 08:10 AM
It's a thermistor so it doesn't matter which way the wires are connected. Both wires go all the way back to the ECU because the ground side is analog signal ground, which is isolated from chassis ground.

Twiglet240
06-07-2013, 12:39 PM
I'm getting 4.87 volts to the plug is that correct?

OnTheChip
06-07-2013, 01:21 PM
The spec is 5V, but 4.87 is close enough.

Twiglet240
06-07-2013, 01:25 PM
Thanks guys, trying to clear up a bogging issue on my car, visit my bogging thread in S-Chassis if you have time.