Need help asap!! Differential plug

Thu Feb 24, 2011 8:41 pm

My car is lifted and I need to help! I have two plugs going into the back of the diff, I need to know which one is positive and which one is negative.. I don't know if it has been changed already because by logic it should just be a double plug instead of two separate ones.. From the back which one if which ? I love you guys for helping me!

Mart

Thu Feb 24, 2011 8:45 pm

Are these plugs on wires to the diff speed sender?

Thu Feb 24, 2011 8:50 pm

DHFiS wrote:Are these plugs on wires to the diff speed sender?

Yesss

Thu Feb 24, 2011 9:12 pm

It looks like the brown wire is the ground and the brown/red is the feed.

HTH

Charlie

P.S the above was taken 87 325i but is the same on a 1991 version

Thu Feb 24, 2011 9:18 pm

I'd be tempted to try them one way and if the speedo doesnt work swap them.

Best wait for an expert though.

Thu Feb 24, 2011 9:23 pm

Doesn't matter which way around they are.
The coloured plastic shell that you are missing for the plug is available separately from BMW.

Fri Feb 25, 2011 11:15 pm

I just tried the red on the driver's side (or black can't remember) and it works

, if you need to know which goes which PM me and i'll get back to you. Thanks guys

Fri Feb 25, 2011 11:30 pm

Brianmoooore wrote:Doesn't matter which way around they are

Sat Feb 26, 2011 9:13 am

I usually find replacement plugs on E34 or E36 scrappers

Sat Feb 26, 2011 9:57 pm

Brianmoooore wrote:
Brianmoooore wrote:Doesn't matter which way around they are

Fine. Don't PM me because it doesn't matter which one goes where.