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Discussion Starter #1
So I haven't been able to find a thread about doing this, if there is one point me in that direction please and thanks.

I have a light bar on the front of the truck that will be holding a 32" LED bar on top and 2 LED pods on the bottom. I plan on using the pods for amber/low visibility cases and the bar for when I need some light. I'd like to wire to a 3 way switch to have just pods for "bottom on" position and pods and bar for "top on" position.

I know I need relays but have no idea how I'd wire them up to make this work.

Do I need a 4 prong relay? 5 prong? I should only be pulling 18 Amps with all 3 lights on (180W bar, two 18W pods).
 

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Just do 2 switches ;)
 

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The simple way to wire this requires two N.O. relays and two SPST switches - one set for each light location. Relays would have four contacts, one set to turn the relay on and the other set provides power to the light. Switches are simple two contact, off or on.

The more elaborate way uses the same relays but replaces the two switches with one center-off, DPDT switch. Wiring this configuration is not difficult but the two switch configuration is probably less expensive.

NOTE: N.O. = normally open; SPST = singlepole, single throw; DPDT = doublepole, doublethrow
 

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Discussion Starter #4
Yeah I have 2 wiring harnesses complete with SPST switches. Since I have 2 blanks to the left of the wheel I can move some switches around to have them right next to each other and flip both at the same time. Probably easiest way since everything is already put together.

Honda, thanks for nothing.

Eakes, you or mbquart were the ones I was aiming for with the question. :big_grin:
 
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It wouldn't be hard to wire them the other way. Three relays required. Bottom contact on the switch to the trigger on one relay with the output for it going to the ambers. Run two wires off of the top contact on the switch to the triggers of the other two relays, output of one to the ambers, output of the other to the bar.

The relays typically come 5 prong, you'd only be using 4 on each of them. One is a ground, one is the trigger, one is the input from the battery, and the last is the output to the lights. The 5th prong, the center one, would go unused on them in this case. On your switch, low power would go into the center pin. The outside two are your outputs to the relays.
 

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Actually, you could just run one wire out of the top switch and just use that one wire to power both relays for the "all on" configuration. They're very low current draw, so it'd be fine.
 

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two switches would be easier in my opinion....
 

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Discussion Starter #8
Thanks, Carbeaux. Unless I see a wiring diagram or picture for that I'll be lost. I think since I already have the two wiring harnesses (free) I'll just use those and put the switches side by side like Fishn. I'm planning on moving my Cargo Light switch down next to the pedal and rear sonar switches, then I'll put the two light switches where the cargo was and the blank next to it. Then I can reach over and flip them both easily if I want.
 
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