Originally Posted by
crazyduck
Happy Friday all....
We all know how bad the F250 lights are and have been contemplating between changing out the stock lights to HID's or add the light bar in the bumper. Well, i'm going with the Rigid 20" E series spot/flood and wanted to see if somebody had a clean and easy way to wire it into the bright lights. I do want to be able to use my aux too and saw a good post of this on this forum but wanted to check and see if there are any other examples of wiring. I just don't want to mess anything up wiring into the stock brights.
Thank you...
best thing to do is use a relay driven off the brights. and one powered from an upfitter switch..
so you would wire it this way
light bar relay
battery ----> 30
lights <------ 87
ground ----> from second relay
upfitter switch --- 85
this means power to the light bar will ONLY be on when
1. the upfitter switch is on
AND
2. the brights relay is on
brights relay
ground ---> 30 & 85
to light relay --->87
jumper from bright headlight power to 86
this relay toggles ground on and off, depending on the brights being on or not.
the ground ON would enable the light bar relay
when the upfitter is on.
this puts the minimum amount of power draw on any existing circuit
(power to toggle the relay, which is about .23 amps, (usually 2.8 watts or less))