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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 01-25-2005, 07:29 AM   #1 (permalink)
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My 525 was involved in a minor accident and stood at the shop for an extended period of time. Battery went flat and the guys at the shop decided to jump start it with the cables connected directly to the battery. Now when the battery is connected the hazard lights come on even though the hazard switch is not activated, and a relay in the relay cluster under the rear seat clicks away merrily, stopping from time to time. The engine cranks over and there is a spark, but it appears that the power to the fuelpump relay has somehow been cut.

Any ideas, suggestions , as I have run out and would like to get the car running again. It has the M50 motor with single Vanos, and the S11 computer with firmware dated around 1994.

Thanks
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Old 01-26-2005, 06:05 PM   #2 (permalink)
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Quote:
Originally posted by dynabyte@Jan 25 2005, 02:29 PM
My 525 was involved in a minor accident and stood at the shop for an extended period of time. Battery went flat and the guys at the shop decided to jump start it with the cables connected directly to the battery. Now when the battery is connected the hazard lights come on even though the hazard switch is not activated, and a relay in the relay cluster under the rear seat clicks away merrily, stopping from time to time. The engine cranks over and there is a spark, but it appears that the power to the fuelpump relay has somehow been cut.

Any ideas, suggestions , as I have run out and would like to get the car running again. It has the M50 motor with single Vanos, and the S11 computer with firmware dated around 1994.

Thanks
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hazard lights on+relays clicking+fuel pump cut off switch triggered by accident and jumping battery=Alarm cutting off problem? Anyone?
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Old 01-27-2005, 01:27 PM   #3 (permalink)
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I would say he's got relays that are either damaged or installed incorrectly. Maybe they got fried with the jump-start?
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Old 01-28-2005, 08:36 AM   #4 (permalink)
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I'd be pushed toward the electronics being fried from the jumpstart. The car shouldnt be jumped directly to the battery, thats why there are specific jump points in the engine compartment.

Also, if they didnt turn on all the electronics in the car (heater, lights, etc) when they remove the jumper cable, the power surge could get to sensitive electronics and cause similar problems. It happens more often than you might think.
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