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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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Old 07-16-2007, 08:39 AM   #1 (permalink)
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1990 735iL Tail Light

I need help with a right side tail light problem. (The left side works fine.) There is only 9 volts at the bulb terminal, without the bulb, which then drops to zero when the bulb is inserted. The fuse is good and measures 12 volts, so somewhere I think there is a poor or corroded connection. The tail light wire has only 9 volts where it enters the trunk. I don't have a wiring diagram and would appreiate any suggestions on where to start looking.
Thanks, Rudy
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Old 03-27-2008, 09:12 PM   #2 (permalink)
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Hi, my RHS tail light would go off unexpectedly, and then come on later. It was suggested that the mustard coloured relay in the fuse box is the problem. I followed the given instructions, re-soldered the lugs on the back of the resistors and so far no more problems. the link for the info is
E32 Soldering fixes - LKM & Mustard Relay

All the best Richard
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Old 11-10-2009, 07:15 PM   #3 (permalink)
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If it isnt the relay or the lkm I would check your trunk ground i had a very similar issue on my 1990 735il except it was my low beam headlight it proved to be a ground issue. If you need a quick fix or cant find out what it is run a jumper wire from one tailight to the other.
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