This 2004 Buick Rendezvous came in with a complaint that the turn signals and hazard lights would not work. The customer stated that the problem occurred shortly after backing a boat in the water. I started by checking to see which fuses were involved and located the fuse box on the passenger side of the center console.
While I am here I decided to point out the flasher unit (turn signals and hazards)
Fuse number 19 for the turn signals.
Fuse #40 for the hazards. The fuse was blown and replacing it brought all of the lights back to work. Apparently the flasher is set up so that if the hazard fuse blows you will lose both hazards and turn signals.
Since the customer had mentioned about backing a boat trailer, I decided to look at the harness for the trailer. Pretty clear to see why the fuse blew. The green wire is for right turn and stoplight. The white wire is ground.
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This is great! I have exactly the same problem. My trailer wire was damaged on the ground. When I plugged it into the hitch wire with the hazard lights on, the hazard light suddenly stopped working – no any response. Also the turning lights stopped working. Looked into online and found this post. Thanks for sharing this experience. I just spent $4 in Walmart and got an assorted set of fuses. Following this post, it is very easy to find the fuse 40 in the fuse box on the passenger side (Buick Rendezvous. Replaced a new 15Amp fuse and then everything works!!!
Thanks a lot. Iris