Electrical gremlins...
thanks again for all for all their help over the years....
As a test if your car is equipped, enable twilight sentinel. This will automatically turn on the headlights when dark enough. If they turn on properly with out the symptoms of the turn signal light coming on then the multi function switch is suspect.
I have heard that there are some instructions on the forum on how to disassemble and adjust the contacts in the switch. I personally have not needed to look for these.
Gary





,,, Usually when something comes on like that, its because of a GHOST Circuit. Meaning, a ground path is missing or defective. If it were me,,,,,,,, I would pop the front of the car up on stands, remove the front closeout panel under the nose and find the front wiring harness SPLICE PACK.Pop off the little cover and pull out the shorting buss bar
Here are a couple examples of a Ground Splice Pack (SP) This is the one under the fascia:


The fatter wire actually goes to G-101 or G-102 where it is actually grounded to the chassis:
Here is a picture of G-101. You can take it completely apart and make sure that there isn't any corrosion inside:



CORROSION like this:





One other thing it could be is a bad bulb socket. Before you get too deep into expensive multifunction switch replacement, pop out the bulbs/lamp sockets and really give them a close inspection and cleaning. All it takes is a little corrosion or a poor connection in that socket/s and you will have issues.
Last edited by Bill Curlee; Mar 17, 2017 at 01:47 PM.





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