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wiring backup light

Discussion in 'Lighting' started by HerNameIsLucy, Dec 4, 2008.

  1. Dec 4, 2008 at 7:06 PM
    #1
    HerNameIsLucy

    HerNameIsLucy [OP] I miss Lucy. :-(

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    I picked up a pair of cheap chinese made driving lights for 10 bucks on sale at Harbor Freight. Want to mount one under the truck and use it as a backing-up light.

    It's a 55 watt bulb...so it draws roughly 4 amps.

    I'd like to just hook it up to the existing lead going to one of the truck's reverse lights. Think the truck wiring would handle another 4 amp load back there, or should I run 12V to the rear and through a relay using the truck wiring to just pull in the relay?

    I know the circuit is fuse protected but I still don't wanna take chances.
     
  2. Dec 4, 2008 at 7:13 PM
    #2
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    FlimFlubberJAM
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    This is your best bet. :)
     
  3. Dec 4, 2008 at 7:14 PM
    #3
    HerNameIsLucy

    HerNameIsLucy [OP] I miss Lucy. :-(

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    Thanks. I'm gonna end up building a relay box back there. I have some neon light tubes meant to go in a computer and I'm going to tuck them up under the bed side rails. May as well run a good size 12V line back there and then relay it out to where it needs to be.
     
  4. Dec 4, 2008 at 7:15 PM
    #4
    Zombie Runner

    Zombie Runner Are these black helicopters for me?

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    I wired mine into the existing reverse lights and have not had any problems. What is the main point/advantage to using a realy?
     
  5. Dec 4, 2008 at 7:15 PM
    #5
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    Post up some pics of the bed lights when your done! I have been wanting to do this for quite some time. :)
     
  6. Dec 4, 2008 at 7:17 PM
    #6
    HerNameIsLucy

    HerNameIsLucy [OP] I miss Lucy. :-(

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    Will do. Going to try for a Sunday install day. Provided everything works out in the "personal" world.

    If I'm gonna relay the new backup lights I may as well put both of them under there yes?
     
  7. Dec 4, 2008 at 7:19 PM
    #7
    Zombie Runner

    Zombie Runner Are these black helicopters for me?

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    thanks, I guess I should go ahead and add one then
     
  8. Dec 4, 2008 at 7:19 PM
    #8
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    Oh hell yes! :D
     
  9. Dec 4, 2008 at 7:21 PM
    #9
    HerNameIsLucy

    HerNameIsLucy [OP] I miss Lucy. :-(

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    110 watts of reverse lights not including the stock ones. My neighbor across the street is gonna LOVE me!
     
  10. Dec 4, 2008 at 7:38 PM
    #10
    HerNameIsLucy

    HerNameIsLucy [OP] I miss Lucy. :-(

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    where did you find 100 watt bulbs that fit in that socket?

    is the lamp type in the 2nd gens the same as 1st gens?
     
  11. Dec 4, 2008 at 7:43 PM
    #11
    HerNameIsLucy

    HerNameIsLucy [OP] I miss Lucy. :-(

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    oohhh...missed the "not the factory location" part.

    that looks good! hopefully I can find a decent mounting point for mine. peeked underneath today and don't see anywhere obvious. bottom of the bumper is wide open.
     
  12. Dec 4, 2008 at 7:50 PM
    #12
    HerNameIsLucy

    HerNameIsLucy [OP] I miss Lucy. :-(

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    hmmm...these el-cheapo lights don't have mounts that can be rotated to the rear of them, they're kinda like off-road lamps with the mount in the bottom.

    so if i bolted a "L" bracket to the frame, then another one to that I'd end up with a "U" bracket. then i could rotate the lens on the lamps and run them upside down.

    definite possibility!
     
  13. Jan 22, 2009 at 3:41 PM
    #13
    08toyoamn

    08toyoamn Its For Sale. :(

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    question... should i wire the extra lights to the reverse sensor or to an independant switch ? and im not real savy on the topic, but i have some good help at the ready...
     
  14. Jan 22, 2009 at 4:29 PM
    #14
    HerNameIsLucy

    HerNameIsLucy [OP] I miss Lucy. :-(

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    The ones I used are 55W, so they draw a tad more power than I wanted to pull through the backup light circuit. I used a relay tripped by the backup light circuit, fed off a 12GA fused wire I ran from the battery.
     
  15. Jan 22, 2009 at 4:45 PM
    #15
    CAdiveTaco

    CAdiveTaco Well-Known Member

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    Using a relay powered from a dedicated switch or the existing reverse light circuit and a dedicated power line to the new reverse lights will allow you to use a lower ampacity circuit to control a higher ampacity circuit...
     
  16. Jan 22, 2009 at 5:46 PM
    #16
    cam-shaft

    cam-shaft Well-Known Member

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    APM system is how I wired up my back up lights and I have power for more accessories. Fully self contained accessory system, can run all kinds of accessories winch forward lights, and more. This system can even be powered up by a complete accessory battery. This system has a complete shut down system and marine grade resetable breakers and relays.

    click on slide show and show info to check out.

    http://www.flickr.com/photos/cobemotorsports/sets/72157608067149624/

    Thanks, Cam-shaft.
     
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