360 experts I have a weird hazard (electrical) issue help please

I had a similar issue when i bought my 360, turn lights not working. Turned out to be pinched wire from when the bumper was reinstalled while work was done at the dealer.

 

Can you recall if both sides were not working, even using hazards?

 

Pretty sure it was both sides - memory (this is 5 years ago so a bit questionable) says that they are wired together, so if one goes the other does as well.

 

It would depend on your definition of "goes" and "wired together". A short circuit or open circuit on one side should only affect one side during turn indication operation (power is only sent to one side at a time). If the flash "relay" outputs were wired together, both sides would flash even during a turn. The turn indication on instrument panel is wired to both sides, but there must be diodes in the circuit to stop the sides interfering with each other.

 

Thanks, Lee!

That was the only thing that really made sense to me.

This seems to confirm that the module needs permanent battery (red wire) power (as well as key power) to operate the left/right turn signals. The hazards need only the red wire. Unfortunately, knowing this, it makes diagnosis harder for some faults.

 

And in celebration of your fix.... Here's my latest diagram with the latest tweaks (and an added note about the power requirement) :

https://www.dropbox.com/t/zRKqDXJcycKRCi4v