Got a great deal today on two more 100w driving lights. I figure I'm going to wire one more into circuit on the roof and I plan on mounting the other one underneath the bumper somewhere in the rear.
My objective is to have the 100w light operate on the same circuit as the reverse lights, meaning power will flow to the light only with the truck in reverse. I'd prefer not to route the light through its own circuit and switch, as wiring 11 feet of 12v wire would get messy and look terrible.
So my question stands, how should I locate the correct wire to tap into? Should I simply solder the power wire from the new light to the existing rear light? Will such a modification trigger the notorious "Rear Lamp Failure" light on the VIC? And finally, do you think it is safe to put one more 100w light in that circuit?
the stock bulb is only rated around 27 watts. adding something 4x as big might fry the wiring which would be a pain to have to replace. for about $20-25 you could probably get some 10 guage wire and a relay and wire it up to the battery.
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I think I am going to mount two up on the top roof rail, and operate them on a completely different circuit than the rear lights. I don't want to tap into the 27w and fry the wiring, but thanks for the guidance!