toledoUPSguy

iTrader: (1)

You don't say which light bar you have so it could be just a cheapo fleabay version that doesn't work. My suggestion to you is go to Putco's website and download their instructions for the blade. They have the best instructions for how you have to wire a light bar to these Fords without issues. Keep in mind that if you don't have a blade to ignore the part about wiring up a constant 12v.

I still say the Opt7 redline triple is the best looking bar out there BUT one quit working on my buddies Ram and I was following another Ram yesterday that was totally messed up. So it is not just us Ford guys having issues with them.

goateater69

Get the Opt7 and follow my wiring schematic with Diodes and you will not have a problem.
I’ve had mine wired this way since 10/19 with no issues.

dbledan

best diagram I have seen kudos. I did this exact setup on my 16 F150 and my 19 F350 with two different light bars and have had no issues on either.

Depending on your light bar some have added relays to each wire run depending on how much power is drawn by the lightbar. Putco wants a constant hot or it will put the taillights in a spin and not function. When trying to pull the power they need it makes the computer think there is a miswire and it shuts them down. Their instructions work to resolve that problem for their light bar. Other light bars may draw too much power and computer thinks it's a short shutting them down. The relays resolve that problem because the relay draw is low.

Opt7 and the other generic one I used did not require the relays or a constant hot and wire just as you show.

goateater69

Thanks, glad to hear it worked for you. That’s exactly why I installed the diodes on the turn signal wires. I noticed without them the Opt7 would short out when then turn signal and brake was activated. I discovered this by disconnecting the right turn signal wire from the tail light harness and detected that voltage was coming from the lightbar on the right side wire, when the left turn signal was activated. Which was causing my short.

Truck guy 3

If it helps this is the bar I bought.

MICTUNING Triple Tailgate Light Bar Waterproof Plug-and-Play Aluminum Frame with 4-Way Flat Connector Wire - Amber Sequential Turn Signal, Red Brake/Running, White Reverse Lights for Pickup Truck

by 4.3 out of 5 stars

goateater69

Follow my schematic and install diodes on the turn signal wires. Sounds like your having the same problem as I did.

DexG1

So I followed the wiring diagram for my LED tailgate strip light and everything works however, my check engine light is on. Can anyone help with this?

dbledan

When mine failed the blinker would just flash fast and the taillights went out. Turn the truck off and back on would make it work again until another short was detected. I never got a warning on the dash or a check engine light so I dont think they are related.

do you have a code reader or forscan to see what the code is?
where did you tap the wiring? And what year truck?

DexG1

Thanks for the response. I turned the truck off and on and noticed the check engine light was not really on. I guess I just panicked however, I notice when I turn on the blinker it blinks until I press the brake, is that normal?

dbledan

it