bmwm3owner
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Hi Friends,
I finally got my E9 running and the brakes all rebuilt. What a journey that was! I am now trying to chase down a minor electrical issue that I am running into. I have a '72 CS and when I turn on the fog light switch, it blows the #2 fuse and cuts power off at the license plate lights and rear side marker lights. I have been studying the wiring diagram for the '72 CS and it looks pretty straightforward. It appears that turning on the headlights powers fuse #2 (Gray wire). There are (2) Gray-Red wires that come off that fuse. One of them powers up the side markers and license plate lights and the other gray-red wire powers up the fog light switch. Looking at the fog light switch, there are (3) gray-red wires that are crimped together at the female connector. If I remove that bundle of gray-red wiring from the fog light switch, the fuse does not blow and side marker/license plate lights work. If I plug that bundle back in and turn on the fog light switch, it pops the fuse. If I remove the wire that goes from the fog light switch to the fog light relay, I still blow a fuse. This leaves me with two more wires to test on the fog light switch - the ground and a green-violet wire. The issue is when I look at the wiring diagram, I do not see any fog light switches on it. All I see are a few notes that say "TO FOG LT". What I don't understand is that the headlight switch powers up fuse #2, and then it appears that the at the fog light switch, the (3) gray-red wires go to the A/T connector (what is that?), another goes back to the headlight switch (not sure why since the headlight switch appears to power up fuse #2), and then the 3rd gray-red wire comes off of fuse #2 to power up the fog light switch.
Anyone know where the green-violet wire from the fog light switch goes to? I suspect that is the issue or the fog light switch may be bad.
Thank you all so much.
I finally got my E9 running and the brakes all rebuilt. What a journey that was! I am now trying to chase down a minor electrical issue that I am running into. I have a '72 CS and when I turn on the fog light switch, it blows the #2 fuse and cuts power off at the license plate lights and rear side marker lights. I have been studying the wiring diagram for the '72 CS and it looks pretty straightforward. It appears that turning on the headlights powers fuse #2 (Gray wire). There are (2) Gray-Red wires that come off that fuse. One of them powers up the side markers and license plate lights and the other gray-red wire powers up the fog light switch. Looking at the fog light switch, there are (3) gray-red wires that are crimped together at the female connector. If I remove that bundle of gray-red wiring from the fog light switch, the fuse does not blow and side marker/license plate lights work. If I plug that bundle back in and turn on the fog light switch, it pops the fuse. If I remove the wire that goes from the fog light switch to the fog light relay, I still blow a fuse. This leaves me with two more wires to test on the fog light switch - the ground and a green-violet wire. The issue is when I look at the wiring diagram, I do not see any fog light switches on it. All I see are a few notes that say "TO FOG LT". What I don't understand is that the headlight switch powers up fuse #2, and then it appears that the at the fog light switch, the (3) gray-red wires go to the A/T connector (what is that?), another goes back to the headlight switch (not sure why since the headlight switch appears to power up fuse #2), and then the 3rd gray-red wire comes off of fuse #2 to power up the fog light switch.
Anyone know where the green-violet wire from the fog light switch goes to? I suspect that is the issue or the fog light switch may be bad.
Thank you all so much.
