3-Series (E21, E30)Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.
Recently installed a new starter and for the life of me I can't remember the wiring. I have a thick red wire with a small red wire connected to it, a thicker black wire, and a thin black and yellow wire.
On my 85 325e they all go to the same post on the solenoid except the thin black and yellow wire. That one goes to the lower one of the two spade terminals on the solenoid, as installed. It is the one with a vertical orientation.
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