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  1. simp5782

    M925A2 Electrical issue, Circuit breaker/relay issues, Horn/ABS problems

    https://www.steelsoldiers.com/showthread.php?t=113634 Sent from my SM-G935P using Tapatalk
  2. simp5782

    M925A2 Electrical issue, Circuit breaker/relay issues, Horn/ABS problems

    Tap the lip with a screwdriver and hammer. It is a snug fit as it is sealed on to keep moisture out. yet most of them let crap in especially if they sit. Best bet is to drill a hole in the bottom of it so any future moisture can get out. Could be the bad diode for the horn. I attached some of...
  3. simp5782

    M925A2 Electrical issue, Circuit breaker/relay issues, Horn/ABS problems

    The horn is ground side switched from the steering column. if you unhook the ground wire off the solenoid (#25) on the horn does the horn turn off? It should always have power with the key on. It is the same power from the #10 wire the 15amp fuse line. There is a diode in that harness but that...
  4. simp5782

    M925A2 Electrical issue, Circuit breaker/relay issues, Horn/ABS problems

    That generally doesn't hurt em. I unplug em all the time with the trucks running especially on one that has stupid wiring splices and crap or a harness that has been turned into a birds nest. You didn't do anything wrong. I have one I am working on now that will charge into the red every so...
  5. simp5782

    M925A2 Electrical issue, Circuit breaker/relay issues, Horn/ABS problems

    More than likely your alternator was on the fritz end of the whole scenario anyway with the dash short. With that PCB box they are pretty susceptible to any short or spark and they tweek out. Alot of people have issues with those alternators like I said earlier. I ran one for 60,000 miles...
  6. simp5782

    M925A2 Electrical issue, Circuit breaker/relay issues, Horn/ABS problems

    That is good that it is. For future reference you may want to get in touch with member 74M35A2, he sells a brushless alternator for the A2 trucks that gets the PCB and ABS modules out of the equation. Alot of these trucks will have a voltage spike and it will blow the PCB box and ABS module...
  7. simp5782

    M925A2 Electrical issue, Circuit breaker/relay issues, Horn/ABS problems

    The PCB box is mounted on your firewall just above the steering shaft. It contains two solenoids. Search "PCB box" in the 5 ton section and you will see what it looks like. The ABS modules are separate and are located above the axles. Does your voltage gauge show that you are charging or no...
  8. simp5782

    M925A2 Electrical issue, Circuit breaker/relay issues, Horn/ABS problems

    Go to the 5 ton TM section and download the P2P program so it will help you track down wires. The ABS modules are between the rear axles mounted up high. There is one for each axle. The horn should have power all the time with the switch on. It is ground side switched thru the steering column...
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