Recent content by Thunderbirb

  1. Thunderbirb

    Pulsing lights

    Update on the lights. After some wiring I have managed to get the the lights to stop pulsing. I do believe it was a bad ground behind the dash but I do think I still wired some things incorrectly. The tachometer hasn’t worked since I had the truck and I tried to wire it up following the diagrams...
  2. Thunderbirb

    Pulsing lights

    I do think it is a few bad grounds since I found a couple that were not bolted down behind the dash. I’m working on fixing a lot of the cut wiring to make it stock again. The glow plug toggle switch was wired up very unsafe where one wire was connected to a random fuse and he added an extra wire...
  3. Thunderbirb

    Pulsing lights

    Thank you! I’ll check it out!
  4. Thunderbirb

    Pulsing lights

    If anyone has any diagrams for wiring going from engine bay through the firewall to inside the cab. I have some wires that I’m trying to find matching ones too but it’s starting to get difficult and some that look the same are different gauges so it’s confusing me a bit. The lights that turn on...
  5. Thunderbirb

    Pulsing lights

    I will be fixing the grounds a little better now and going through all the wiring of the dash to fix the issues that I have. I have a lot of wires though that I can’t find any diagrams for. I’m planning on fixing the grounds especially since I found some ground wires behind the dash that weren’t...
  6. Thunderbirb

    Pulsing lights

    This is how my wiring is and it’s such a rats nest of problems. I did find a couple grounds that weren’t connected behind the radio!
  7. Thunderbirb

    Pulsing lights

    Well you are right about that. I really don’t trust it that much so i should really suspect it too I just don’t know where to start in fixing this wiring.
  8. Thunderbirb

    Pulsing lights

    I do want to go through the dash and fix the wiring problem because the previous owner cut a lot of wires and did some weird splicing. Wish I could find a truck that I can steal the wiring harness from to fix everything but it’s hard to find any junk trucks here around the same year I need. I’ll...
  9. Thunderbirb

    Pulsing lights

    One of the mods that the previous owner did to this truck was add a toggle switch for the glow plugs so In the morning when I try to start it I have to flip the switch for a few seconds to let the glow plugs heat up and then the truck will start. I don’t think it would be the glow plugs cycling...
  10. Thunderbirb

    Pulsing lights

    I’m definitely going to try this. It couldn’t hurt to do this. I’m still going to get some new gauges later but this is great info to know! Ill do it tomorrow and see what happens!
  11. Thunderbirb

    Pulsing lights

    I suspected a bad ground so I ran a test today to check if that could be the issue. I connected the jumper cables up , one clamp to the body of the truck and the other end directly to the negative on the primary battery but even doing that I still saw the lights do the same thing. The lights did...
  12. Thunderbirb

    Pulsing lights

    It will do it all the time. I can watch the lights pulse while driving to work in the morning. I never noticed the issue until I started driving when it dark. During the daytime I don’t see any issue. As one person said, the amp meter on the dash will still bounce up and down as I drive even...
  13. Thunderbirb

    Pulsing lights

    I posted a video to YouTube to show what exactly the truck is doing
  14. Thunderbirb

    Pulsing lights

    My wiring behind my dash is kind of messed up from the previous owner cutting and splicing wires so it wouldn’t surprise me if the wiring is the problem. Even if the gauges are dummy lights I will watch the voltage gauge on the cluster and it will bounce up and down. The batteries are charging...
  15. Thunderbirb

    Pulsing lights

    New to the forum and new to diesels in general. Bought a 85 Ford F-250 with the stock 6.9. I read a few threads about the pulsing lights. I’ve replaced the alternator and voltage regulator but I’m still getting the pulsing lights at higher rpm but goes away at idle. I’m going to try cleaning off...
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