hella 500 ff's

55*4=220w/12v=18.3amps So a 30 amp relay should be fine. i would prob run a 10 or 8 guage wire from the battery to the relay, then two 14ga wires up to the lights to be safe.
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this is how i've ran mine for years without problem. if you want them to be ignition controlled, change 86 to a hot wire from key.
 
What about 2 relays wired to 1 switch. each relay going to a pair of lights. This is my plan

ai221.photobucket.com_albums_dd257_K0045_Design_Lightingwiring.jpg
 
That'll work too. Just a bit more wiring to do.
 
thanks a bunch. Looking at running the two relays that came with them on one switch. Quick ? though... Say I have two 15A relays, does the switch need to handle 30A's? Or is a 15A switch still ok?
 
15A switch will be plenty. That rating is for the load (light bulb) side of the relay. The contacts in the relay are rated for 15A. The coil inside it doesn't draw 15A. That would defeat the purpose of a relay.
 
before anyone asks yes i can read... but I have gone through the wiring on here and in the directions for the lights and still have no light. I have double and triple checked the grounds and the power line from the relay is hooked directly to the battery. The light does work (tested with the two wires touching the battery terminals) and the inline fuse is still good. The directions say hook into the hi beams but I dont want to run em that way. both switches I have are three post with the one from the light kit saying hook the #1 post to the line for the hi beams. I was leaving that unhooked because like stated above, but still no light......
 
So the No 1 post needs to be hooked to power. The other (Probably middle) post goes to the coil side of the relay. The other side of the coil side of the relay goes to ground. (That's the load in that circuit.) The third post on the switch goes to ground (to light the switch.)

Then on the load side of the relay. (Lights) Fused power from the battery goes to one side of the switch on the relay. The other side of the switch in the relay goes to one side of the lights. The other side of the lights go to ground.

Basically you are wiring two different circuits. Each circuit has to have power, a switch, a load and a ground. The coil of the relay is the load on the low amp side and the lights are the load on the high amp side.
 
yeah thanks. I figured it out right after I posted that yesterday. the wire that would run to the headlights needs to run to the battery instead. basically you have two wires hooked to the battery. one from switch and one from relay
 
anyone know what kind of draw the lights put on the battery? My 250 doesnt have a "battery" gauge so I dont know what kind of draw the four together have.
 
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