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Installing light bar on 03 2500Hd

Discussion in 'Strobe Lighting' started by dj89, Dec 9, 2009.

  1. dj89

    dj89 Senior Member
    from wny
    Messages: 112

    I have mounted my light bar on my truck see in my sig for info on it. Were is the best place to run the wires in the cab? The only place i can see is the cab filter..... is there any were else?
     
  2. 04chevy2500

    04chevy2500 Senior Member
    Messages: 228

    are you using the factor light switch? you have multiple options. you can do the vent or if you want a perminant solution you can drill into the roof(wouldnt recomend this).
     
  3. naturalgreen

    naturalgreen Senior Member
    Messages: 404

    some guys go through third brake light.
    search previous posts
    just make sure you seal it
     
  4. deere615

    deere615 2000 Club Member
    Messages: 2,919

    If you have the plow prep pack wires are above headliner just run them to your third brak light other wise for my lightbar I just run them right through the 3rd brake light through the headliner down along the windshield. If your doing something different and have to go another way just drill a hole in your firewall On my 03 2500hd the was a round opening in the plastic on the inside and the stuff that covers the outside of the firewall and I just drilled a hole, dont forget to put something around the edges so wires dont rub on bare metal and also if you go the third brake light way you gotta reseal it with some silicon
     
  5. dj89

    dj89 Senior Member
    from wny
    Messages: 112

    The wires are big. I do not have the plow prep. How wold i run them through the filter? drill a hole?
     
  6. deere615

    deere615 2000 Club Member
    Messages: 2,919

    Dont know how big wires could be for a light but I have 6 going into the top of my 3rd brake light for my responder and 4 going through the bottom for cargo lights. You can notch the brake light some also, then just reseal it this is the easiest way to wire in a light on the roof if your not drilling a hole in the roof. I would go though vents but thats me. Heres a pic of my half ton not 2500hd but the hole is close to the same area if not the same spot.
    engine with all new wires-firehole marked.jpg

    engine with all new wires-firehole marked.jpg
     
  7. dj89

    dj89 Senior Member
    from wny
    Messages: 112

    There is two 8 gauge wires with like 14 gauge, for power to the battery, Than Another wire ith 3 14 gauge.... I think i will run them through the vent.
     
  8. KL&M Snow Div.

    KL&M Snow Div. PlowSite.com Addict
    Messages: 1,616

    The vent is probably best for that amount of wire.
     
  9. Burkartsplow

    Burkartsplow PlowSite Veteran
    Messages: 3,245

    There are two knockouts in the back corners of the cab. Look under the cab and you will see them. You will have to pull up the floor mat or carpeting from the corner to have full access to them(very simple). Take a hammer and they pop right out. I have 5 wires running through both of mine for all my lights and salter with that plastic sheeting around them. You will have plenty of room with them. It is a pain to try and go through the vents. Good Luck.
     
  10. dj89

    dj89 Senior Member
    from wny
    Messages: 112

    Sweet that what i was looking for thanks a bunch. Did you just drill a hole in thm and run the wires through?
     
  11. EGLC

    EGLC PlowSite.com Addict
    Messages: 1,733

    yep you can do that or even better you do this.....much better place "imo" more weather proof

    this is right where the floor of the cab comes up for the rear seat
    [​IMG]
     
  12. deere615

    deere615 2000 Club Member
    Messages: 2,919

    yeah I forgot about that spot also but I never ran wires through there on mine
     
  13. BoyneCityGuy

    BoyneCityGuy Senior Member
    Messages: 143

    The vent really isnt too difficult, just have to have a little patience, and a second set of hands goes a long ways. usually you can pop the vent out with a screwdriver, run the wires thru the plastic piece then into the cab, either run a fish tape from inside to pull them out thru the hole in the back padding, or have someone with long skinny arms go from the inside and pull the wires into the cab, snap the vent back on, and you are done. on my new truck i did a cb wire thru each side without removing the vent, alone...what a PITA...but really a great place for getting wires in and out! Good Luck!
     
  14. Burkartsplow

    Burkartsplow PlowSite Veteran
    Messages: 3,245

    No they just pop out. they are made for this exact application.
     
  15. dj89

    dj89 Senior Member
    from wny
    Messages: 112

    Do i need to get a rubber grommet?
     
  16. tuna

    tuna Senior Member
    Messages: 488

    You could use a manicure.:laughing:
     
  17. Burkartsplow

    Burkartsplow PlowSite Veteran
    Messages: 3,245

    you can but where they are at you should not get any type of moisture in the cab. I mean I run with my window open all night long so i get snow inside all the time, but never any by the two knockouts.