Hi, where is located engine coolant temp warning light switch that switch the warning light on?
I have iroc-z 350 tpi 1987 with double radiator fan.
Gauge sender i know and tcs sensor to ecm but that switch in the passenger side head, i read that it is for fan. Sonwhere is light switch?
Thanx if someone could help me.

 

The IROC Z does not have a temperature warning light. It has a temperature gauge...

 

Okay, thank you for that info.
SO the red warning light on the led side on cluster is brake warning? It lights when starting.

So i can take off that temp switch, because it does nothing in my car. I got a separate switch for the fans, because the original control turns them on as soon as car is started. I think it have something to do with ac removed.
I could put extra digital gauge sender for that 3/8npt hole?

 

That switch in the passenger side head was a fan control switch. Sounds like your car has been "modded" into no man's land though, so all bets are off as to what the heck you have going on under there.

 

So it could be 😅 I think that removing the air conditioning affects the fan to be always on. I have a mechanical capillary switch that turns fans on desired temperature.
In 37 years can accommodate many modifications. I think the car works pretty well, but it doesn't want to reach the operating temperature, so i bought that switch.
I also have a usb cable in progress so I can connect the laptop and see what's going on with the emc.