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Rock Light wiring

Discussion in 'Lighting' started by untuckedtaco, Mar 6, 2013.

  1. Mar 6, 2013 at 5:16 PM
    #1
    untuckedtaco

    untuckedtaco [OP] Well-Known Member

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    I am installing rock lights but i want them to come on at different times during vehicle operation and am at a standstill on how i should wire them. I would like the light to activate at the following times:

    1: with the dome light, so they will come on when i unlock the truck (so no rapists get me)

    2: with reverse

    3: on a switch mounted in the bed

    My question is, can I pull power from each source down to one relay? Or do I need an individual relay per power source? and if more than one function is in operation will it damage my led rock lights from having too many power sources?

    Anybody that could help with a description or a diagram of what would need to be done would be greatly appreciated
     
  2. Mar 6, 2013 at 5:18 PM
    #2
    trdNick

    trdNick Odie

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    One relay should work, just tie all three power sources to the power on the relay. I have reverse lights that come on with a switch and when in reverse, both power supplies feed one relay. On the diagram below you would just tap another wire into 86 tab on the relay

    [​IMG]
     
    Last edited: Mar 6, 2013
  3. Mar 6, 2013 at 5:29 PM
    #3
    Ryan DCFS

    Ryan DCFS New guy

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    My AUX reverse lights are controlled by a relay and a 3 position SPDT on-off-on switch, either on, off, or on with reverse. You would have a fused power source to the relay, direct from the battery. (30 pin + in, 87 pin + out)

    Then you would have a fused source tapped from the reverse, and another + power source from the battery to the bed switch, into the + coil circuit on the relay (86 pin + in, 85 pin to ground). This is how I wired mine.

    I've read that it is not easy to add anything to the circuit for the dome lights if it's going to have several sources. This is because the switch for the dome lights is a ground switch, meaning it is on the negative side of the circuit, not the positive. Someone correct me if I'm wrong.
     
  4. Mar 6, 2013 at 5:32 PM
    #4
    untuckedtaco

    untuckedtaco [OP] Well-Known Member

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    I guess my concern is where all of the 12 volt connections come together at the relay. What happens when my tailgate switch is activated, i go in reverse and my dome light is on (not likely that all 3 will occur at one, but still a possibility
     
  5. Mar 6, 2013 at 5:37 PM
    #5
    Ryan DCFS

    Ryan DCFS New guy

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    This would require a diode, as the 1st power (from bat) would send power to the reverse circuit as well as the relay coil.
     
  6. Mar 6, 2013 at 5:41 PM
    #6
    untuckedtaco

    untuckedtaco [OP] Well-Known Member

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    with the dome light in question, could i run a constant power to the rock lights and then tie the ground into each source?
     
  7. Mar 6, 2013 at 5:49 PM
    #7
    Ryan DCFS

    Ryan DCFS New guy

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    [​IMG]

    This has no dome light option.

    If you tie all the circuits into the dome lights, then the lights will only come on when the dome lights are on.
     
  8. Mar 6, 2013 at 5:54 PM
    #8
    untuckedtaco

    untuckedtaco [OP] Well-Known Member

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    thanks for the help. kinda disappointing that the dome light can't be included
     
  9. Mar 6, 2013 at 6:14 PM
    #9
    Ryan DCFS

    Ryan DCFS New guy

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    That diagram is pretty close to what I did with mine.

    There may be someone on here that can give you more help with trying to incorporate the dome light. I'm just not sure how you'd do it without having the whole circuit one polarity or the other, and switching between them easily.

    You could maybe find a polarity reversing relay and run a secondary circuit if that's possible. I know there's a thread on here somewhere that details making the map lights come on with the dome light. I know it uses a diode, but those lights are also negative switched. The thread might give you some more info on the dome wiring, though.
     
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