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      10-15-2024, 05:47 AM   #1
Plebbio
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Won't start 335D E90 2012

Hello! I've got a big problem with my car, it won't start, i've checked the battery and it's full, but whenever i try to start the car it dies, and there is a clicking from the glovebox ( which i've figured might be the relay?) ive changed the relay and i still got the same issue, i can start the car by having starthelp, but sometimes that doesn't even work, everything just goes black ( no electricity) and the only way to get it on again is to disconnect the minus pole on the battery and put it in again, but as soon as i start the car it repeats, any idea what this can be? Thanks for any help!
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      10-15-2024, 09:48 AM   #2
lnxguy
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Are you getting RPM while cranking? Could be a ground issue, a CPS issue for the wiring coming from the trunk through the rear pass wheel well could be corroded.
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      10-15-2024, 11:04 AM   #3
ptpending
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if all car goes black then wire going inside salon to junction box have bad contact to junction box
this is well known issue
the dealer even have repair kit for this issue
if it was issue with outside cable , the inside electronics still was alive
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