Upfitter Aux 1 no power after connecting Flex Era 4 lights

[mightymouse43]

HELP!!! I installed some KC Flex Era 4s tonight and hooked them up to Upfitter 1. When I turned them on with my backup lights connected to Upfitter 2 the Aux Upfitter 1 does not have power. I also have a reverse brake assist not available error on my dash. I think I checked the right fuse under the hood but I am not sure. I used a continuity tester on the fuse and it checked out fine. Does anyone know what i am doing wrong? Or what I should check next?

 

[mightymouse43]

I think the reverse brake assist was due to rain on the rear bumper.

So does anyone know what fuse or relay to check for upfitter 1.

 

[Cblaxx19]

saw your post on facebook, how did you connect to the aux switch wire?

did the lights work at all at first and now they don't or they never worked?

 

[mightymouse43]

Yes they worked for about 15 seconds then Went out.

I bought these connections and installed them on each wire under the hood.

ZUOZE 10 Kits 1 Pin Car Connector Waterproof Electrical Connector, Male and Female Way 18 AWG Wire Harness Plug Socket Kit for Truck, Motorcycle, Boat and Other Wire Connection https://www.amazon.com/dp/B092YSQ7RP?tag=f150tremor-20

It worked fine for my backup lights for about 3 months. I tested the wire with a multimeter and I do not have 12 volts at the wire.

 

[Cblaxx19]

Yes they worked for about 15 seconds then Went out.

I bought these connections and installed them on each wire under the hood.

ZUOZE 10 Kits 1 Pin Car Connector Waterproof Electrical Connector, Male and Female Way 18 AWG Wire Harness Plug Socket Kit for Truck, Motorcycle, Boat and Other Wire Connection https://www.amazon.com/dp/B092YSQ7RP?tag=f150tremor-20

It worked fine for my backup lights for about 3 months. I tested the wire with a multimeter and I do not have 12 volts at the wire.

going off of the specs i see, the flex era 4's draw 6.7 amps each. so the 2 lights you have would draw 13.4 amps. the connectors you bought claim 10 amps max current rating. Also, Aux 1 is a 10A fuse.

this being said, if your fuse looks good, check your connector. i doubt the connector would fail and not cause the fuse to fail, but who knows.

no matter what, you should be putting the 2 lights on aux 2 or 3 which have 15 amp fuses.

 

[mightymouse43]

going off of the specs i see, the flex era 4's draw 6.7 amps each. so the 2 lights you have would draw 13.4 amps. the connectors you bought claim 10 amps max current rating. Also, Aux 1 is a 10A fuse.

this being said, if your fuse looks good, check your connector. i doubt the connector would fail and not cause the fuse to fail, but who knows.

no matter what, you should be putting the 2 lights on aux 2 or 3 which have 15 amp fuses.

Totally and thats where I plan on keeping the lights on 2. After work tonight I plan on troubleshooting the connector and swapping the fuse.

 

[mightymouse43]

Ok, Fuse was good, swapped it with a known good and tested to make sure I have power at the fuse panel. So I am down to two things, either I am looking at the wrong fuse (I totally think this is the case) or I have an issue somewhere else in the wiring harness (highly doubtful as my Aux 1 switch still shows Blue for off and orange for on in the cab). I looked at the fuse diagram in the manual and cannot seem to find the right 10 amp fuse. It shows up fitter 1 as position 60 but that is a 15 amp fuse and no other references to up fitter 1, Aux 1.

 

[mightymouse43]

Found it. It was relay number 3 on the fuse diagram in the manual.

 

[Fozzy]

2022 Ford F-150 fuse box diagram - StartMyCar

www.startmycar.com

 

[zimm]

Found it. It was relay number 3 on the fuse diagram in the manual.

So it's working now? With that much amp draw, I would wire a relay and take battery power to those lights and use the Aux 1 to trigger the relay. That's a lot of juice to be running all the way up to the headlight and back to the bumper.

 

[Yeti]

HELP!!! I installed some KC Flex Era 4s tonight and hooked them up to Upfitter 1. When I turned them on with my backup lights connected to Upfitter 2 the Aux Upfitter 1 does not have power. I also have a reverse brake assist not available error on my dash. I think I checked the right fuse under the hood but I am not sure. I used a continuity tester on the fuse and it checked out fine. Does anyone know what i am doing wrong? Or what I should check next?

yeah, either relay that or move the pair (then relay it). Each light is 160W which is 6.7A @ 24V or 13.3A @ 12V. So a pair of them is 26.6A @ 12V. Also, may want to think about 12 or 14 AWG between the new 30A relay and the "y cable"/splitter for the lights depending on the length of both the negative and positive wires, combined.

 

[mightymouse43]

Yeah looking at the supplied wiring harness it looks like the 12 volt lead on the other side of the relay is the same gauge as the upfitter. Also I think those amp ratings are for the whole light not just the white light. The amber background light is on a harness from Starsky that people use for raptor style grill lights. So far everything is good. I ran them for a while last night with no issues.