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wiring and lighting questions for truck

Discussion in 'The DIY Room' started by Sirchopsalot, Jan 29, 2023.

  1. Sirchopsalot

    Sirchopsalot

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    So my bed is rusting, has a few minor dings, and a tail light problem (eats bulbs every 6 months on one side).
    *2007 Ram 1500. I'm getting ready to pull the old bed, and put a wooden one on. I did this once before, Dodge 3500 dually, converted from utility body to 8x9 flatbed, 2" oak bed.

    *no more light issues
    *might be able to hang storage boxes underneath the bed for saws/tools
    *will have a plank in the bed that opens to storage under the bed, inside the frame rails
    *I can add custom lighting to make it look bad apple (clearance lights on the side, additional reverse lights for actually seeing at night when backing)
    *Redneck finish: oil/diesel mix finish applied liberally. PT SYP wood this time.
    *plan to undercoat the truck prior to bed going on (may hire that out, did that on the 3500).


    So I'm not sure what wiring would be best from under the cab out to the bed
    I will use that plastic corrugated tubing, to keep mice at bay unless there are alternatives
    Wood bed, can route wires wherever to be out of the way
    LED lights.

    Problem: on the 3500, LED lights for the turn signal messed with the tick-tock gadget. I recall putting a new one in, but the fuse panel cover wouldn't fit correctly after that. Considering an incandescent light for the turns...

    Kinda itchy to get into this project, etrailer is my friend. But hung up on the turn signal/LED issue.

    SCA
     
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  2. FarmerJ

    FarmerJ

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    I’d put in a 7-wire harness and not worry about it.

    Grote makes different harnesses and stuff for different vehicles and beds if you browse their website
     
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  3. Warner

    Warner

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    My work truck has conventional bulbs in the front and LED’s on the back of the utility body. The directionals “blink” faster but they still work. Are you saying that the leds don’t work at all?
     
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  4. Sirchopsalot

    Sirchopsalot

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    So I'd wire a harness from the truck, to the bed. That would eliminate a myriad of little connectors then? Cool.
     
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  5. brenndatomu

    brenndatomu

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    So this is using the trailer connection to power the tail and running lights? Guess that'll work...how do we power trailer lights then though?
    They make resistors to make those LEDs work right for the turn signals I think...the better lights come with them.
     
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  6. Sirchopsalot

    Sirchopsalot

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    nah, last time I added LED's to the 3500, the trick system didn't recognise there was a light back there and blinked as if the bulb was out (fast). I replaced the tick-tock (relay?) and it performed properly, but the relay thingie was bigger than the stock one.
    Looking to avoid the same issue now: either replace the relay gadget or use incandescent turn signals.
     
  7. Sirchopsalot

    Sirchopsalot

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    I'm not sure where the trailer lights are fed from.....their own circuit or off the truck lights circuit.
     
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  8. FarmerJ

    FarmerJ

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    Pretty much…

    curt, Hopkins, Grote and several others make kits.



    ram flatbed wiring harness - Google Search
     
  9. Warner

    Warner

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    Ah, the round tick tock thingy is called a flasher. If both sides have an led on the rear it will blink faster but still indicate you are turning. That would be good enough for me.
     
  10. FarmerJ

    FarmerJ

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    They actually make LED rated flashers.
     
  11. Warner

    Warner

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    Yup, there are a few things you can do. I just don’t see the need to if the lights are flashing.
     
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  12. Jeffrey Svoboda

    Jeffrey Svoboda

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    Why not use the taillight wiring that's already there? It's usually run down the frame rail and isn't connected to the bed other than by the spare tire.
     
  13. FarmerJ

    FarmerJ

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    Because the flash rate specified is 60-120 flashes per minute. (I’ve had trucks put out of service for this stupidity).

    nht92-4.41 | NHTSA
     
  14. Warner

    Warner

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    A passenger vehicle?
     
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  15. FarmerJ

    FarmerJ

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  16. Sirchopsalot

    Sirchopsalot

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    that must have been the fix last time. Some trucks I guess, are set up for that, others need the LED flasher. The fast flash always drove me batty, normal speed is good.
    If I can, absolutely.
    I also want to add clearance lights on the bed side, they'll come on with the parking lights. And will look bad apple with the trailer hooked up (I hope).
     
  17. Warner

    Warner

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    Somebody counted the amount of times the blinker flashed in a minute? Or worse there is a machine they use to measure ? :loco: :crazy:Talk about a waste of resources.
     
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  18. FarmerJ

    FarmerJ

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    Doesn’t take much to figure out the differences.

    it’s pretty obvious When it’s flashing rapidly. There’s a normal rate that people expect to see from over a century of automobiles on the road now.

    FMVSS 108 (federal motor vehicle safety standard) is actually a pretty big resource for all motor vehicles on the road.

    even covers bumper heights, tire width and exposure etc.
     
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  19. Warner

    Warner

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    Thanks bud, I get that. :tip:
     
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  20. FarmerJ

    FarmerJ

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    If you’re talking about the FMVSS, there’s specs on everything. Lumen brightness etc. and everything has an engineering spec.

    No different than anything else in life. Over the years, the industry standardized the flash rate.

    so not sure why the hate on “wasted resources” for the spec of 1-2 hz.

    may as well say a 1/2” bolt could be 1/4” then too.
     
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