2005 379 turn signal nightmare.

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Liqer1821, Jun 14, 2022.

  1. Liqer1821

    Liqer1821 Bobtail Member

    8
    0
    Jun 14, 2022
    0
    2005 pete 379 C15 Acert
    Manufacture Date -11/2004
    All LED lights
    Lights in mudflap hangers

    We have been battling this issue for about 2 years. The Turn signals only work when they want to it seems. It's been to 3 shops, it's gotten multiple blinker switches, Flasher relays, I replaced both brake pressure switches 4 days ago. I recently started driving this truck 2 weeks ago. The last guy hardly left the highway so he just manually blinked them. I haul a mix of things including oversize, yesterday I was downtown Milwaukee with pilot cars so I need this #### to work. It's had the wiring to the lights in mudflaps replaced 4 times. I've pulled all the lights checked and replaced some butt splices ( all heat shrunk) also all have been properly checked for proper length stripped and crimped. It has dual rev S/T/T to reverse, connections are good and I replaced one light with bad connection to pigtail yesterday. It seems when there stuck on if I hit a bump they some times start working, or vise versa. I also have noticed my phone charger which has power from the cigarette lighter blows fuses every once in awhile, when I go to replace the fuse the blades in the fuse melts so times.....so I'm very worried there is something wrong with the fuse block. When trick is parked they seen to always work, last night I went front to back checked plugs behind bumper at Y harness, pulled and wiggled everything pins/plugs, lights. Inspected wires. Shook harness while blinkers were working. Pulled and shook cables into junction box to trailer wiring (did not open to inspect) going to do that today. Next step is to replace brake pressure sensors and brake pedal valve. We have also tried to replace 2/3 led lights with halogens for more draw. Nothing I've listed had made a difference. I know this is long but its all the information to this point. If anyone has experienced this and has tried anything not listed or found the culpret I'd greatly appreciate the help.
     
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  3. kranky1

    kranky1 Road Train Member

    2,253
    8,843
    Sep 16, 2015
    Ontario, Canada
    0
    I had problems with my ‘05 W900 and signals. Even a b-trains worth of LED’s wasn’t enough load to make the flasher work right. Had to #### with the switch to get the flasher to start. I put an incandescent licence plate light on each trailer. That stopped all of the problems I was having. The other electrical issues, this may sound out there, but check your wiper pivots. I’ve had a Pete leak past those when they were worn and the water runs right down the back of the fuse panel and causes all sorts of electrical mayhem.
     
    rollin coal Thanks this.
  4. Liqer1821

    Liqer1821 Bobtail Member

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    Jun 14, 2022
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    Ok I will give that a try, I have also noticed online some led Flasher relays have # of lamps there for, I'm assuming that is max. I'm going to check to see what the one in here is rated for this afternoon.
     
  5. lalemodel

    lalemodel Bobtail Member

    36
    6
    Oct 9, 2011
    deltona,florida
    0
    My frt liner did that it was a breaker in fuse box ,bad contacts
     
  6. Liqer1821

    Liqer1821 Bobtail Member

    8
    0
    Jun 14, 2022
    0
    I have figured it out, I'm not I believe it was just a bad flasher ground. It was grounded to 1/4" aluminum bracket in the dash with a coarse thread sheet metal screw. I can't say for sure, I also found 4 positives shorting out on frame and 2 in the dash. Also multiple broken ground wires including a 4 gauge cab to sleeping ground.
     
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