740 & 760 Cooling fan set up on a 1990 740GLE
I need some help with my 740. The car already has an electric fan that is supposed to activate when the car becomes too hot. There is a sensor in the radiator that is supposed to trigger this, however, it has never been triggered. The sensor could be faulty.
The fan does work but when I connect one side of the switch to the other (with the engine running) it does not trigger the fan.
Does anyone know where the relay for the electric fan is?
I want to set up the fan to activate when the AC compressor turns on (it's hot up here in QLD). There is a wire that runs above the compressor that I could use as a trigger wire but I'm not sure if this is a suitable source. Does anyone know?
I was intending to connect this wire to one side of the switch on the radiator so that I could use the original relay setup to trigger the fan.