Originally Posted by
abshipp
New observation:
Key "Off":- hazards work correctly
- L/R signal lever: no action
Key "ACC"- hazards work correctly
- L/R signal lever position
- L: driver side lights illuminate
- R: driver side lights illuminate
Engine Running:- hazards INOP
- L/R signal lever position
- L: no action
- R: driver side lights illuminate
Still sounds like a BCM but I really can't help from here, if I was still at the job I could talk to the guy who do that stuff all day. One thing I do sometimes is test the voltage on different fuses related to the circuits in question. If you get low voltage on a fuse that could be a clue, like 8 or 9 volts and the others are 12. Try to find grounds and make sure they're good.