BMW Repair: electrical, gauge wire, temperature gauge

Question
Hi Josh
I have a 1986 BMW 325es that has some kind of electrical problem.
When I go to start the car, all of the accessory electrical works, the
power windows and sunroof and temperature gauge does not work.
Also when the key is in the start position, nothing happens, there is
no response from the starter at all. I also tried to pop the clutch to
get the car to start and there is no spark. I have checked the fuses,
and battery and they are good. I am also fairly sure that none of the
relays are bad but it could be a possibility. If you could help me or
give me suggestions as to what is wrong that would be greatly
appreciated, thanks.

Answer
Jonathan,
I know that the solenoid on the starter can cause issues like this (had it happen).  There is a small (16-gauge?) wire that connects to the solenoid beside the larger wires from the battery.  You should be able to disconnect this wire and see if your windows work.  If they do, I'm almost positive that the solenoid is bad.

 Good luck,
 Josh