325i AT 180K 1987
Car will not turn-over. Battery good... will check ground next. Interior lights come on, and everything seems to work but will not crank.
I checked the AT interlock switch on the shift lever in the console. Light that illuminates selected gear position does not light... bulb is good.
Tested AT interlock switch by:
Volt meter tested interlock switch input wire (Grn/Yel) to brown (ground) wire of the Bulb while turning on the ignition switch. No voltage. I also tested the AT interlock switch - input to output wire... as predicted, no voltage.
Because the interior lights are on, and the AT interlock switch is also low voltage circuit, I would think there should be voltage present.... even if the ground on the car is not sufficient to power the starter.
According to the circuit diagram, the AT interlock switch input wire comes from the ignition switch, through a fuse (10 amp), and to the AT interlock switch.
Does anyone know where the 10 amp fuse is located? I have not looked for it as yet.
I'm guessing the ignition switch is the source of the problem. Without taking off the steering column plastic, is there an easy way to check this? Can I test the ignition switch someplace other than inside the steering column? How?
Any other common sources of "no crank" on 325i's. I'm ok with cars, but this is my first German brand... new to this car... my son just bought it.