Is there a mechanic in the house?

[Peter]

Problem with my 1990 525i. Driving home last night and car just died. Won't start and absolutely no power coming through the system - nothing works interior light, hazards, engine lights etc. Just had a replacement battery about 3 months ago and no signs of problems until it cut out. Any ideas?

[dazren]

Has the trip switch below the spare tyre in the boot popped out? Have the battery connections worked loose? Other than that you need an auto electrician with a voltmeter.

DAZ
(mechanical dunce)

[Peter]

Battery connections are fine. Wasn't aware of the trip switch in the rear. Is that some sort of safety switch?

[dazren]

Cuts the electrics out in the event of a crash.

DAZ

[domster]

Check the alternator. If that is fecked you will drain the battery down to nothing.

[Peter]

Thanks for your replies. Turns out the problem was caused by a linkable fuse beside the battery terminal. Once this pops then cuts all power. 50p to replace - woo-and-indeed-hoo!