1991 BMW 525i 1991 525i engiene wire harness

FLYBOY97222

MEMBER
1991 BMW 525I
6 CYL
2WD
AUTOMATIC
220,000 MILES

I have now burned threw a second engiene wire harness. The hottest wires seem to be coming from the wire box attached to the firewall in the center of the engiene compartment.
The hottest wires are White/yellow and White/purple. They start at the DME and end at the diagnostic plug.

can anyone point me to where I can find info on what these wires control? I'd like to find the source of the short so I don't burn threw a wire harness again.

4 Replies

MHPAUTOS

MECHANIC
31,937 POSTS

Hi there,

Thank you for the donation, i have located the system for you, see pic, now this is a bit out of my comfort zone, so i will pass this post on to a mod with specialist BMW knowledge.

mark (mhpautos)

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Monday, May 31st, 2010 AT 10:11 PM

DOCHAGERTY

MECHANIC
9,601 POSTS

Thanks Mark. Flyboy, can you send the last 7 of the VIN for reference and positive ID?

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Tuesday, June 1st, 2010 AT 4:27 PM

FLYBOY97222

MEMBER
19 POSTS

BJ66417

the entire vin is

WBAHD6318MBJ66417

thanks and I have a cat that looks like your avatar!

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Tuesday, June 1st, 2010 AT 5:49 PM

DOCHAGERTY

MECHANIC
9,601 POSTS

What do you mean by hot? Where is the burning at in the harness? What precipitated the failure? Was the car in an accident? I'm trying to get to the root of the problem and gather information to give a reliable response, there might be something simple that is being overlooked.

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Tuesday, June 1st, 2010 AT 11:17 PM