Every now and then the turnsignals on our 2005 GC SXT 3.8l go haywire. If I signal right (flick the lever up), the left signal lights come on; if I signal left (flick the lever down), nothing happens. This all started right around 40K miles last Spring and it was during an extremely heavy rainstorm when it first occurred. I had it into the dealer several times. Of course it wouldn't act up for them - finally one day I was able to take video of it. After that they replaced the computer module. It was fine for a month or two but the problem has resurfaced and still happens occassionally. Frankly, I think the problem was a bad connection of some sort and was only incidentally 'fixed' when they changed the module.

Not sure if this is related, but twice this past month the van has had the 'common'problem withthe power locks ceasing to work. I have learned I can fix that problem by momentarily pulling the IOD fuse. Still it's a hassle.

 

check ground wire coming off of battery.. the small one on the neg post.. should be 2 there.. grab it and wiggle it.. see if it breaks really easy.. sounds like ground.. and that wire is ground for bcm

 

Thanks for the response. The ground seems to be good. But I'll keep an I on it.