Will it make a difference on what kind of car I`m tapping on. I have
a `04 Tahoe which I believe have the same bulb wattage (55) I just
finished installing the PIAA airdam and the 40 series lights and I was
thinking if it would be OK for this truck if I just tap the wiring to
my existing fog lamps wire/switch. Or should I use the PIAA switch
that came with it. just want to make sure. thanks!
Do you have the service manual for your truck?the service manual I have for
my truck has the wireing diagrams, with the fuse ratings marked. As long as
the wattage of the light is less then the fuse, you 'should' be ok, but as
Mr/ Smith said, its best to just have the OEM wire and switch run a relay.
This can do two things for you. It will save the switch in the event of
having too much load. And, you can run a heavier, shorter power line to the
lights for better power delivery giving the lights a tad more juice, making
them just a tad brighter.
I would use a relay, plain and simple. The factory Multifunction switch
IMHO is barley able to handle factory lighting. Adding more amps though
that switch will definitely shorten its life.
I would power them off some kind of hot battery buss. The relay would
get its power from this. I would power the relay from whatever circuit
you could tap off. I would only do it from key on circuits so you don't
run down the battery if you forget to turn them off.
Do not tap off the existing switch for those light unless at the least
you get a melted switch or the worst a fire.
Since I modded my low and high beams with relays and tapping battery
power from the hot buss next to the master cylinder on my 97 GMC my
lights are brighter and I really enjoy all 4 lights on when my high
beams are on. This mod cost me less than 20 bucks and I got the parts
from Radio Shack.
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