Upfitter / High Beam

Good deal, thanks

FYI, this turned out to be a really easy mod. Parts Express has nice heavy duty waterrproof 12V relays with sockets that are inexpensive. I wired it such that my AUX 3 switch arms the relay then the high beam wire behind the passenger headlight triggers the relay to close thus lighting the dually spots. Around town/highway use, I leave AUX 3 off and back country roads I leave it on. Much easier to use the high beam stalk vs. reaching for the AUX switch.

Here's a good link with instructions. On my 2011 SCREW, the high beam trigger wire (connector behind the passenger side headlight) is Violet/Orange tracer, not sure about other years but it's easy to test for +12V with a multimeter.

TUTORIAL - Fogs with Highbeams! - Ford F150 Forum - Community of Ford Truck Fans

Basic relay terminal wiring:

30 - 12V in from AUX switch
85 - ground
86 - high beam trigger
87 - 12V out to the Duallys

Sorry to be a bit dim but do I have this correct , if so it's what I want as we'll. if you have the aux switch off and you use the hi beams the light bar stays off. You turn the aux switch on and the high beam switch now turns the light bar on ?

Gsteve said:

Sorry to be a bit dim but do I have this correct , if so it's what I want as we'll. if you have the aux switch off and you use the hi beams the light bar stays off. You turn the aux switch on and the high beam switch now turns the light bar on ?

Click to expand...

You got it! Turns on high beams and aux lights. In reality it's an extra step to get your aux lights on which some may not want off road or if you don't want your high beams on with your off road lights. But for me it's exactly how I wanted my dually spots to work. My dually amber floods are on a separate switch (aux 4) which I usually just leave on 24x7.


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Found it Stang! Thanks!