what you have is a bad ground the fun part is finding it, the reason why you have lights coming on is they are the nearest path to ground for the effected circuit
On my 1994 525iT
Almost every time I turn on the A/C, I get a F/FOG LIGHT + LOW BEAM warning on the CCM.
While this is happening:
The left turn indicator on the instrument cluster is partially illuminated
The dashboard does not click when the turn signal is on
The left high beam headlight is partially illuminated (even when headlights are off) and switches off and on, alternating with the left turn signal
These problems go away when the A/C is off.
Things I have done to remedy (basically everything that I have found in posts and that is common sense):
New LKM
Cleaned and checked all connections
Changed bulbs
New voltage regulator for alternator
Could it be the alternator itself?
Ryan
1994 525iT
what you have is a bad ground the fun part is finding it, the reason why you have lights coming on is they are the nearest path to ground for the effected circuit
all america wants is cold beer warm cat and a place to take a poop with a door on it
Can you help me narrow it down to a certain area?
Ryan
1994 525iT
without getting my hands on the car id guess it's a under hood problem, look for grounding points on the body and see if they are loose nut/cruddy/broken lug, you'd be amazed the weird stuff that can get affected by a bad ground that shouldn't be connected
all america wants is cold beer warm cat and a place to take a poop with a door on it
Check the grounds at the compresser first! sounds like its backfeeding through the dash cause of a bad ground...not really a good thing at all!
If that dont help...
Go from the battery forward, unhook/clean/replace. then like Winfred says go under the hood, bumper, everywhere you can find ANY wire hooked to the body,bumper,frame and clean.
95 E34 530I V2.37
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Those who make peaceful revolution impossible will make violent revolution inevitable.
John F. Kennedy
if the comp is not grounded it don't run, the clutch grounds to the compressor and that gets it's ground through the bracket to the block, possible the main engine ground may be weak, you can check for that with a pair of jumper cables, hook the engine to the body, i like to use my multimeter on 10A setting and connect the motor to the body while it's running, anything over 1/8-1/4 amp and somethings wrong, usually engine ground problems show up in running problems and temp gauge readings
Originally Posted by 632 Regal
all america wants is cold beer warm cat and a place to take a poop with a door on it
Thanks very much guys. I checked the big wad of brown ground wires grounded to the left side of the engine compartment. The nut holding it on was somewhere between loose and falling off. I tightened it and cleaned the contact. Funny thing: not only do the lights work correctly, but everything else works a little better and the car runs better. I am going to be really irritated if that is all that it was. Grateful, but irritated.
Thanks again.
If only the speedometer worked, all would be right with the world.
Ryan
1994 525iT