Originally Posted by bravetitan24
What all would I need to wire these up assuming they're 150W lights?
Now that you have asked…
First off you need to decide on two or three lights.
Then the usual proactive is to wire them in pairs, so there is an odd man out here.
Do you really need the third light (?), IMHO… NO ! It will be out of place and as stated before it is a good spare.
Going on the assumption that I have talked you into two light the following will apply, you can ad the third in another relayed circuit and you can use the same switching wire but not the same relay.
150W x 2 = 300 Wt / 12V = 25 amperage draw/pr
What you need…
1) 40 amp std automotive relay with 4-pins. there are two type of relays, a 4-pin and a 5-pin, the 5-pin has pin 87A, almost useless, if that is the only one you can find then use it and cover the extra pin with heat shrink so it doesn’t get hit accidentally.
2) Fuse and holder for 30 amp fuse
3) 10 ga wire for the main power wire
4) Sw for the dash - any sw will so, small amperage draw so it does not matter.
5) 16 pr
18 ga wire for the sw, enough to go from the fuse panel to the sw to the relay and then a small ground wire.
6) Small fuse holder and fuse for the sw power.
7) Indicator Light, you may or may not want this and some switches come wit it built in so your call.
Now wire per the schematic below:
I did this How-To, not sure if it is good or not but read it and then you can tell me:
How-to: Aux Light Hookup with Indicator Light
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