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 86 735i
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Posted - Oct 20 2014 :  11:30:12  Show Profile  Reply with Quote
Hi everyone, new member here,,im from Mission, British Columbia. This is my seciond 86 735i . I had my car sit foir 2 years..during that time i had the vacuum lines replaced (the reason it was off the road) other than that it was fine. But when i went to get it back from mech, battery was stoloen so i bought a new one (per bmw spec) i noticed the charging icon was on , in the drove foir a while, got it home and overnight the battery drained. So, i figured id save time and just get a new alternator..i did, and the light in the dash is still on. Im keeping the batt post off to save the battery. I dloaded the charging system online but i cant understand it and it doesnt say where anything is..just diagramms...useless to me now as my personal computer is kaput and im using a damn ipad right now. My question , if someone can help me is where are the fuses/relays for the batt/alternator? where would the ground be.. The alternator is brand new, not a rebuiult. If i remove a batt terminal while its running, it dies instantly (i know i shouldnt do it, but i did. Where can i look? Thank you in advance! Ron.

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Posted - Oct 23 2014 :  20:29:53  Show Profile  Send Hit Man X an AOL message  Send Hit Man X an ICQ Message  Click to see Hit Man X's MSN Messenger address  Send Hit Man X a Yahoo! Message  Reply with Quote
What alternator is on there? If it has rubber bushings to isolate it, it must have a ground strap from the alternator case to the alternator/hydraulic pump bracket.

If that is there and good, check for 12 volts at the D+ terminal on the alternator (blue wires). This 'excites' the alternator to make it charge.

This is my sig...

Four 745i! One '83 and three '85...I am a glutton for punishment.
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