DonBretw, It's been a while but I traced the yellow wire all the way back to the BCM connecter and the wire is good ( minimal resistance with an ohm meter) Do you know which pin from the BCM to check? Also how does the harness disconnect from the BCM? I would hate to break it as I am quite capable of that.

 

Are you doing all of this testing with the engine on?


Pin A9 on the BCM connector X3. IIRC; you pull the lock lever, maybe that one is bolted down.

 

Testing was done with power OFF. I was just testing the wire to check continuity. Thanx for the info. I will check the BCM output tomorrow.

 

Finally took the plunge to find what I didn't want to. There is no power for the turn signal coming out of the BCM. Time to replace. Any opinions?

 

Sorry just had to do this.

https://driversed.com/driving-inform...d-signals.aspx

 

Thanx. I almost forgot what I Like about this site

 

Hmm. Back in post #1 you stated you could "fix it" by jiggling the wire harness.
If so, then maybe your recent testing at the BCM was inaccurate. What I mean is, did you test the other BCM outputs that correspond to the lights that are working ?

Just don't want you to condemn the BCM if maybe it was a test error( still basing my opinion on your "fix' from before.)

 

Since it is highly unlikely the BCM would break, just that one function, I would start looking toward the multi function switch.

I just don't know how a computer could forget one 0 or 1. Old fashioned flasher; yes. I guess it could, but pretty unlikely.

The multi function switch (turn signal stalk) has 2 connectors, this is the one for the turn signals. I think the signal sent is "ground". So, when turned to right pin H should have continuity to ground, otherwise it should be open.

 

Thanx for all the help. My latest test was to activate the emergency flasher and insert a test light probe in the BCM X3 A9 and no light, I then moved the probe to A12 and the test light flashed. I used the same connections while pressing the brake pedal and got the same results. I'm stumped.

 

So, there are also wires under the hood to look for. Any work under there lately?

I cannot see anything in the diagrams and schematics I have.