Temp light help

Baker7888

Master Mechanic
Thread starter
Dec 3, 2021
378
28
Maine
I would want it to turn on sooner than that but that is a personal preference and not based on any engineering.
I agree with this however made my decision based on the 180* tstat i am running. The 3053190 temp switch is supposed to be 200 on 185 off but those number seem to vary depending on where you look. Seemed to be the coldest switch i could find at the time that utilized factory lt1 single wire connector. That being said (glad i wrote this down) that switch should have kicked on well before 220 … so not sure what is going on there i guess.
 

Baker7888

Master Mechanic
Thread starter
Dec 3, 2021
378
28
Maine
I agree with this however made my decision based on the 180* tstat i am running. The 3053190 temp switch is supposed to be 200 on 185 off but those number seem to vary depending on where you look. Seemed to be the coldest switch i could find at the time that utilized factory lt1 single wire connector. That being said (glad i wrote this down) that switch should have kicked on well before 220 … so not sure what is going on there i guess.
Also ran temp wire direct to ground and key on to see if i had power at #3 pin (temp light) before i put cluster back in. It did not. Am i missing something here?
 

ELCAM

G-Body Guru
Jun 19, 2021
712
93
You will not have power on that green wire. It is a ground the +12V comes from that 39 circuit and when the temperature is high enough it turns on the switch grounding the green wire and completing the circuit.
 
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Baker7888

Master Mechanic
Thread starter
Dec 3, 2021
378
28
Maine
You will not have power on that green wire. It is a ground the +12V comes from that 39 circuit and when the temperature is high enough it turns on the switch grounding the green wire and completing the circuit.
Got it TY
 

ELCAM

G-Body Guru
Jun 19, 2021
712
93
You need to pull the temp switch for the fan and put it in a pan of heated water with a thermometer and use an ohm meter to see what temperature it really turns on at. If it does switch on at 200 degrees you likely have an air bubble where the sensor is.
 

Baker7888

Master Mechanic
Thread starter
Dec 3, 2021
378
28
Maine
You need to pull the temp switch for the fan and put it in a pan of heated water with a thermometer and use an ohm meter to see what temperature it really turns on at. If it does switch on at 200 degrees you likely have an air bubble where the sensor is.
Thanks ELCAM. I ran the wire straight to ground and the fans did indeed turn on. I ran the PN of the switch and came up with several "alternatives" all seem to turn on/off at different temps, mostly high, like 230s. I left the switch in as I am now pretty sure its one of these higher temp switches. Does anyone know of a switch that is 200 on 185 off
 

Baker7888

Master Mechanic
Thread starter
Dec 3, 2021
378
28
Maine

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