I have a 1999 E39 (528i)
Today I was driving and I noticed my left turn signal was on but the lever
was in the neutral position! I pulled over, turned the car off for a few
minutes but didn't help! I had to drive home with the 4-ways on!
Anyone have any insight on this? I exercised the lever quite a bit hoping
that it was a sticky switch but didn't help!
I had a fault like this around 30 years ago and thought I had diagnosed it
to damage in the cable in the column.
Then a friend pointed out the car had a tow ball and trailer electrics.
Sure enough there was a slave unit for it and a fuse or bulb had blown.
With no diodes current passed between circuits in the device. I replaced
the fuse / bulb and inserted diodes and all was fine. I also had a row with
the maker, but these days such units incorporate protection.
Check you don't have one of these.
Found out it's the switch.
A friend took it out, sprayed electrical contact cleaner inside, put it
back in and it works (for now)
Going to order a replacement as he stated this might be a "temporary fix."
Thanks for your suggestions.
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