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How to wire auxillary lights?

  • Independent of the OEM headlights with ignition on

    Votes: 6 37.5%
  • Independent of the OEM headlights with ignition on or off

    Votes: 7 43.8%
  • Come on only when the brights are on

    Votes: 1 6.3%
  • Come on only when the driving lights are on

    Votes: 2 12.5%

Wirinng up auxillary lights

2089 Views 21 Replies 11 Participants Last post by  Tred
What do you guys recommend?

I've dry fitted my Hella 500's that I've had sitting in my closet for two years now, just wondering how some of you have them wired up?

Obviously the easiest thing to do would be to wire them up independent of any other lights or ignition. Don't think I'll ever have them on when I don't have my brights on anyway, so probably just go that route.

Benefit of having the lights wired independent of the ignition means I can have them on even when the truck isn't on.

Drawback of having them wired independent of the ignition means I can leave them on and drain the battery.

Thanks!!:clapping:
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First one.. That way you never forget to turn the lights off.
If my recollection is correct, my '03 lights have a common power (when the light switch is ON) and two grounds at the headlights - it's the ground that switches for low or high beam through the HL relay. I used the common power to trigger my IPF's and can run them when either the low or high beams are on.

I vote for wiring them to trigger off the highs. This way they'll come on when you flash with the highs (edit: assuming that your aux. light switch is mechanical and will stay latched even with no power to it), a neat thing for the obvious reasons. As you mentioned, they'll most-likely only be used with the highs anyway. Plus, you can still turn 'em on with the ignition off, as long as the highs are on (correct?).
Independently to a switch.
Guess I should have been a bit more clear. There's going to be a separate switch for the Hella lights. What I am referring to is how will I get power to the lights? So, regardless of how I do wire them up, I can always just turn them off and on independently, it will just be a matter of what other lights are on.

I'm leaning towards wiring them into the highs, like Stock Taco mentioned. That way they will shut off when I leave my vehicle and only come on when I have the switch turned on AND I turn on my brights.
Straight to battery fused? :shrug:
Straight to battery fused? :shrug:
Lights will get power that way. What Tillers is wondering is what source will trigger the aux. lights' relay (battery, ignition source, low or high beam). The source trigger is what gets wired to the separate on/off switch and supplies power to energize (close) the relay.
Lights will get power that way. What Tillers is wondering is what source will trigger the aux. lights' relay (battery, ignition source, low or high beam). The source trigger is what gets wired to the separate on/off switch and supplies power to energize (close) the relay.
Correct, this is my question. I have the relay kit with this setup, so it's not just going to be ghetto rigged.:)

Think I'm going to wire everything up this Saturday, so I need to decide by then:meemee:
05 plus headlights are common ground and positive switched.

I vote tap the relay on the park lights the switch. So u can turn them on and off but only when the park lights are on.
U could add an add-a-circuit on the park light fuse on your inside fuse box rum a 5 amp fuse and then through a switch then out to the relay under the hood.
05 plus headlights are common ground and positive switched.

I vote tap the relay on the park lights the switch. So u can turn them on and off but only when the park lights are on.
U could add an add-a-circuit on the park light fuse on your inside fuse box rum a 5 amp fuse and then through a switch then out to the relay under the hood.

Yep, use a relay and only have it powered with the key on.

Its probably not a good idea to wire them into an existing light circuit because of the extra load on the factory fuse and relay set up.
Well, got the switch portion taken care of. Upper one is foglights, lower one is for Hellas:clapping:

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I have never accidentally left the lights on to the point of draining the battery dead.
I inadvertently voted for the second option, I would like to change to the first option, as with a previous vehicle, I had fogs independent of the ignition/light switch, and left them on and killed the battery.
Yep, use a relay and only have it powered with the key on.

Its probably not a good idea to wire them into an existing light circuit because of the extra load on the factory fuse and relay set up.
the only power draw is to activate the relay, not much less than 0.5 amps

ur new button is where my trac/a-lsd button, then on the opposite side of the lower is my rsca(roll over side curtain airbag) on/off switch.


hell just look tiller headlights are on there.
By the way, if you use an Add-A-Circuit to the fuse box inside the cab, you can easily switch between an ignition controlled power source and a constantly powered power source by moving spots.
When I wired in my aux. lights I used the parking lights to trip my relay. Whenever the parking lights are on, my aux. lights can be turned on. Mine are driving lights though, and as such, should only be used with the high beams. So now I have to flip on high beams, and then the driving lights. This is kind of annoying, so when it gets warm enough again I'm going to switch over to the high beam relay setup.

If yours are fogs, go with the driving light setup. If they're driving lights, go with the high beam setup.
Well, just finished wiring the lights up. I ended up tapping into the parking light (kudos to rednecktaco) source, this way I can turn the Hella's on with high, low and parking lights. I still have some cleaning up to do but I'll post some pictures when I'm completely finished. Also, the parking lights was the easiest access to get to.
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