I am once again struggling with a repair issue on my 1994 XJ6.
I replaced the head gasket this summer, as well as a door latch and door handle this past couple of weeks. After this I thought I was good to go with driving the car to a job site in Washington DC but then in the dense traffic of WashDC I discovered the hard way that the cooling fans were not functioning.
Now that I am back home I have been looking at the wiring diagram and the actual bits on the car.
I pulled the connector off the fan switch on the bottom of the radiator and found a bunch of corrosion inside the terminals of the switch and the connector that snaps onto the switch.
However even though I know this is not good, I do not believe this is the real root cause of the problem.
When I looked at the MY93 - 94 wiring diagram, I think that there should be power flowing to this thermostatic switch from the fan control relay so when the car reaches a critical temperature that activates the switch the switch will trip and allow a circuit to ground through the black wire on the switch. When I checked these white wire connections on the connector for the thermostatic switch, there is no power in either terminal.
So I then looked at the fan control relay and pulled the wiring plug off of that relay. I have power to the relay through the big brown wire and from the big black with white wire (terminals 3 & 5).
I also checked fuse A2 and A7 in the left hand fuse box and these are good and have power to both legs of the fuse.
I believe my problem is with the fan control relay. I looked at the relay and it seems pretty well sealed up so I do not see a way to take the cover off the relay to get to the internal contacts.
If I have no power on the white wires going to the thermo fan switch in the radiator, do I have a bad fan control relay?