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Wiring 3 way switch for lights

994 Views 7 Replies 5 Participants Last post by  LaxDfns15
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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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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