bmw 850i 1992 electrical problem ??? please help!!! - BMW Forum - BimmerWerkz.com
1,6,7,8 - Series and Mini Cooper General Chat related to models that do not fit into particular categories above. Please try to put your discussion in more appropriate sections. This section does cover the 1 Series, MINI Cooper and 8-Series vehicles: BMW 830i, BMW 840Ci, BMW 850i, BMW 850Ci, BMW 850CSi, M8, Alpina B12, BMW CS Concept and others.

 
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#1 (permalink) Old 01-29-2013, 08:18 PM
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bmw 850i 1992 electrical problem ??? please help!!!

I have a bmw 850i 1992. when its cold out the wipers, trunk, windows, door locks and sun roof do not work..? when temperature comes up the rear relays in the trunk start cliping and things work intermitentely until everything is worm then everything workes again..? I want to find the problem so everything works all the time.. could you please help me..
thank you
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#2 (permalink) Old 02-17-2013, 01:41 AM
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Electrical issues... dont we all.

Electrical is a very touchy subject with the 8. Its like an enigma where one question can lead to 30 anwsers like one relay can affect other things. What I did is replace my original relays with new ones. I took a pic with my camera on my cell phone and got all of the same colors as the ones in the trunk. also consider replacing the BMW fuses with SAE fuses. Better I think.

That is what worked for me. Hope this helps.
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#3 (permalink) Old 02-17-2013, 08:37 AM
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I have tried that allredy.. I think its a bad wire that is broken and when temerature changes the wire has stresse but I have no idee where it may be..?
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#4 (permalink) Old 02-17-2013, 10:46 PM
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Start from the begining. First check your batteries. Sounds cheekey but these cars crave power. Thats why they have two. Check to see if there are good connections in your trunk. Check the positive connetions as well as the ground on both ends. Check to see if they have a good charge or hold a good charge. Then check your charging system. Make sure you are charging a good 14 amps. If not this can cause you not get full operations of some systems. Also scroll down below this thread to look at similar problems. One just might fit yours. Watch and see ur fix will be a simple one.
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#5 (permalink) Old 01-10-2014, 12:00 AM
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hi steph..i have the same issue...
how did you solve it at the end?
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