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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 04-04-2009, 05:46 PM   #1 (permalink)
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Angry This one might stump you!

Ok I sure hope someone can help me. I have a 1992 735il and the low beam head lights work only when they want to not when I need them to, Also the heater is the same it works when it wants to. The high beams work all the time I do not get it. Please help if you can.
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Old 04-04-2009, 09:11 PM   #2 (permalink)
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when they dont work check the fuse for them with a multimeter.. if the fuse doesnt have power its probably a bad switch.. if it does have power remove and reseat the fuse, then continue following the wires looking for where the wires damaged.


the heater? lot of things could be wrong there.. more then i have the ability to list
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Old 04-05-2009, 06:16 PM   #3 (permalink)
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grandnationalcub, I have a 1993 750il which had a similar problem. The low beam lights are switched via a yellow wire from the light switch to pin 3 (a small pin) on the crash control relay and, also a yellow wire, from the opposite small pin on the crash control relay to the lamp control module pin 3 also. If you remove this relay - it's next to the check control module on the windscreen side- you may find one of the small pins has worked loose causing an intermittent connection. You can open up the relay and resolder the loose pin. This is how I repaired mine. I hope your wiring is similar and this solves your problem.
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Old 04-06-2009, 08:46 PM   #4 (permalink)
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It was not the relay.

I just need headlights. I don't care about the heater right now. Headlights would be nice.
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Old 04-07-2009, 03:20 PM   #5 (permalink)
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Fuse F2 via h/lamp switch (yellow wire) supplies the LCM pin no.3. The LKM relay closes and pin 21 (yellow/green wire) supplies the fuse F10 and then the left low beam. Pin 22 (yellow/blue wire) supplies the fuse F11 and the right low beam. Remove the covers on the LKM and plug it back in. Depress the relay contacts manually and see if the low beams come on. Power to pin 3 on LKM should close low beam relay. If it doesn't, relay coil could be open circuit, which means changing the LKM. Check all the voltages first.
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Old 04-07-2009, 06:19 PM   #6 (permalink)
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Well I found out what the problem was with the headlights. It was in the black box that is in the fuse box. I am not sure what it is called. Now if I could just get the heater fixed I would be so happy. The heater comes on when it wants, There are three wires in the middle and only the far right one has power.
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