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)
Drove car to store, came out after ten minutes, turned off alarm and all electrical died - no start, no dash lights, no radio, no powerlocks, etc. After research online I found above post, opened trunk lid (using manual override), and jiggled red cable from battery terminal.... power came back and car started fine.
My question is - what is the diagnosis of the problem and what actions should I take to prevent from occurring again?
No corrosion - happened again this AM - had to have a neighbor jiggle the red battery cable while I started the car (otherwise power would cut back out as soon as I tried to start the car after restoring the power by "jiggling" myself). Terminal seemed tight but will tighten later today. From other posts elsewhere tightening didn't solve the problem but I'll keep my fingers crossed
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