Hazards, turn signals, brake lights, and cruise not working
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Senior User
Joined: May 2014
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From: Southern NM
Hazards, turn signals, brake lights, and cruise not working
Well, on our way home during my leave, the wife made the comment about halfway home that the blinkers had quit working. I assumed it was probably a fuse or relay, so we came on home. I have been looking at it for a few days now (too hot to spend too much time out crawling around under the dash 
) and I am still having some trouble. My brake lights, and hazards are not working, and neither is the cruise, which was working fine while I drove before the blinkers went out.
I have no power at all to the flasher relay. I replaced the brake light switch because it was definitely worn and looked a little burned inside when I pulled it out and inspected, but still nothing. Have not found any fuses blown. Brake pressure switch fused link harness seems good with my test light. Wipers, brights, everything else on the turn signal switch works fine. Can't even get the cruise to go into diagnostic mode, it only blinks once when I try.
Anybody think of something else? Headed back to Fort Polk in a few days, it would be nice to have brake lights and blinkers, and cruise would be awesome too
Thanks guys!
) and I am still having some trouble. My brake lights, and hazards are not working, and neither is the cruise, which was working fine while I drove before the blinkers went out. I have no power at all to the flasher relay. I replaced the brake light switch because it was definitely worn and looked a little burned inside when I pulled it out and inspected, but still nothing. Have not found any fuses blown. Brake pressure switch fused link harness seems good with my test light. Wipers, brights, everything else on the turn signal switch works fine. Can't even get the cruise to go into diagnostic mode, it only blinks once when I try.
Anybody think of something else? Headed back to Fort Polk in a few days, it would be nice to have brake lights and blinkers, and cruise would be awesome too
Thanks guys!
Last edited by justonv; Jul 14, 2015 at 10:08 PM. Reason: spelling
Cross-Country
Joined: Jan 2015
Posts: 89
Likes: 5
From: Central New Jersey
Can you jump the brake light switch and see if the lights work? You should have power on one side of the brake light switch. Broken wires were common at the brake light connector. Check all of your fuses carefully, in the truck and under the hood. Google a diagram of the brake light circuit to see where power comes from and what fuse feeds it. Your cruise will not work with a brake circuit issue.
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From: Southern NM
Thanks, appreciate the input!
I fiddled around a little today with it, found that the 20 amp fuse that runs hazards and stuff was a little loose in the socket, so with some creative use of toothpicks, I got the hazards working. Brake lights worked ok when I put a jumper wire in there, and after some fiddling, I managed to make them work off the switch. I had blinkers working for a few seconds with the jumper wire on the brake switch harness, but they quit working again. So, at this moment, I now have hazards and brake lights, no blinkers, and the cruise still won't go into diagnostic mode. I am thinking of some contact cleaner and clean all switches and plugs, see how it goes from there. All four corners blink with the hazards. I tried two different relays all with the same results.
I fiddled around a little today with it, found that the 20 amp fuse that runs hazards and stuff was a little loose in the socket, so with some creative use of toothpicks, I got the hazards working. Brake lights worked ok when I put a jumper wire in there, and after some fiddling, I managed to make them work off the switch. I had blinkers working for a few seconds with the jumper wire on the brake switch harness, but they quit working again. So, at this moment, I now have hazards and brake lights, no blinkers, and the cruise still won't go into diagnostic mode. I am thinking of some contact cleaner and clean all switches and plugs, see how it goes from there. All four corners blink with the hazards. I tried two different relays all with the same results.
Thread Starter
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Senior User
Joined: May 2014
Posts: 133
Likes: 1
From: Southern NM
One more thing we noticed, when the lights were jumpered, and I tried the blinkers, it would shut off whatever side we tried to signal on. change blinker to other side, same thing.
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