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On 87 300zx where is the wire that connects the thermostat to temperature gage Hope a loose wire and not thermostat no reading on thermostat gage after running for 30 minutes?
Mike1960
if i understand your question, no such wire exists. the thermostat is not electronic. it opens and closes when the temperature causes the spring to expand or contract. what seems to be worrying you may be no more than a coolant temperature sensor that has gone bad. if your car hasn't overheated in 30 minutes at idle, your thermostat is fine. hope this helps you.
The wire that you are probably talking about goes from the temperature gauge to the temperature sending unit which is on the passenger side between the fuel injectors etc. If your gauge isn't working and it is the needle type you can pull the connector off of the sensor (make sure you get the right wire, it's a single) and have someone turn the ignition on as you hold the connector to ground, the needle should move all the way up...if not the gauge or wiring is bad. ...........
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Your temperature gauge is reading hot is this the thermostat?
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Where is the wire that connects the thermostat to the temperature gage Hoping just a loose wire and don't have to change out thermostat no reading on thermostat gage even after running for 30 minutes?
what your looking for is a heat relay sensor its located right in front of the thermostat houseing just follow the top hose comming out of your radiator all the way back till it gets to the top of the thermostat and about three inches towards the front of the vehical there should be (heat sensor) looks like a bolt with a wire sticking out of it diconnect that and take it out and replace it with a new one that should solve your problem.
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