New member, and EASY question for most of you.

[MooWare]

New here, and a couple of years ago picked up an '87 325. Got it for a steal, with damaged engine as she had a broken timing belt. Took apart, long story short garage broken into old cyl head stolen as well as various other parts and tools. Anyway, have a rebuilt head and putting her all back together. My question is.. I have what I am assuming to be an engine diagnostic port, left side toward front of car. There are two groups of wires with eyelets attached. Are these grounds? Do they attach to the post on the intake, along with the mounting bracket or are these wires attached somewhere else that I am not seeing?

I would attach a pic, but don't seem to be able to.

[Tom D]

any brown wire is a ground.

[MooWare]

any brown wire is a ground.

These are about 3 wires to each eyelet, brown with orange stripe. wrapped in the same harness as the the round diagnostic port.

[Tom D]

I don't own an M20, but have swapped them before therefore my advise is based on bmw methodology. any brown wire is a ground. any brown wire with a strip is a ground wire that gets switched. for example, power is fed to the brake warning lamp. from the lamp it goes through a brown wire with a strip to the low brake fluid switch and then through a brown wire to ground.

it seems to me the earlier M20's had a brown/orange wire in the fuel injection system and it needs to be grounded.