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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 09-05-2003, 10:38 PM   #1 (permalink)
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I've got a '93 525i. Four of the contacts between the control computer and the wiring harnes plug-in module have melted down and fried the computer. I'm told I need to replace the computer and the complete harness but nobody including two dealers can tell me how long it might take to replace the harness/wiring.
Do I need to replace the complete harness or can a replacement plug be spliced on?
What might have caused the melt-down in the first place?
Two dealers and a local service shop have never encountered this problem.
Any help out there?
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Old 09-06-2003, 08:54 AM   #2 (permalink)
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Depending on the damage and how far back on the wires the damage is will tell if you need a new harness or not. If you have no electrical background i wouldnt suggest doing this yourself. If you do know how to add connectors and the connector pins then if the damage is confined a few inches back of the connector you should be fine. A number of things may have caused the meltdown. Water, oil, tranny fluid, a bug, pretty much anything that can cause an electrical short. Or your computer suffered a massive short which drew too much current burning the connector.
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