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Hello. I'm new to this site and the world of BMW. I just became the proud owner of a 1988 735i, that has been in the family forever and is in remarkable original condition. One problem though that has me stumped. The tailights go out after about 1o minutes and I can not find any bad connections etc. Signal lights, brake lights and emergency flashers continue to operate. Fuse looks OK and lights will come back on after being off for a while. Anybody have any ideas as where to look?
I would hate to have to go to the dealer.
Thanks,
Klaus
Are you sure there is no corrosion in the rear light cluster where the bulbs fit in??, if ok there make sure all the earths are fine in the trunk around the clusters, If ok check tightness of connector block on the rear of the switch, check the fuse has a good contact, if all that fails then go for the switch itself.
__________________ VELVET BLUE UK INDIVIDUAL , IM THE LAST UNITED WE STAND DIVIDED WE FALL
I stepped in a plate of Pasta the other day - now I have to worry about my Carbonara footprint!
i have the same problem...only the tail lights and parking lights... its fine and then all of a sudden the light comes on stating that the tailights and parking lights are out...let the car sit for a few and then its good to go again....i think im gonna go with the fuse suggestion cause the fuse thats in there is kinda loose feeling hopefully thats it
I had taillight problems with my 1995 740i. I replaced bulbs and cleaned connections for a year before I finally bought a pair of aftermarket replacements on ebay. Installation was really easy and they fit and work perfectly. Nice updated look too. $100. including shipping.
I would like to thank everyone for their suggestions. I worked my way through them and in the end it ended up being a faulty relay($110 Can.). My local garage hunted the problem down after I had tried everything else, including headlight switch. They only charged me 2 hours labour ($80 per)although it took him over 3 hours with the use of my wiring diagram.
Thanks again everyone.
Klaus
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Tail Light Problem 
Linear Mode
