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Tail Light Flicker - PWM frequency adjustment

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PetePerkins

PetePerkins

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No Forscan was used.

Amber Signal:

The amber turn signal wires were physically run from the BCM. If you've ever installed a stereo system...speakers and an amplifier in the cargo area or trunk of a vehicle, this will be easy, running 2 turn signal leads from the BCM is a cakewalk (see attached C2280D CONNECTOR.pdf and C2280D CONNECTOR2.jpg for connector pinout info)

Tail light Park Lamp flicker:

This was the easiest. No need to remove the tail lights. Simply slide back the cargo area interior side panels to gain access to the rear of the tail lights. On both the right and left tail lights, find the blue with grey stripe park light wire, splice it, install your relay (I used a SSR). You will need a constant, hot at all times, 12v power source for the relay. If you understand what a relay is used for and how to install one to do what you need it to do, this will be easy.

Basically, doing this bypasses the 12v BCM tail light lead, which has a PWM signal that causes flicker in OEM LED park lights on Broncos originally equipped with OEM Halogen. The relay uses the BCM lead as a switch to power on/off your tails like OEM and the tail lights are powered by that clean 12v source.

Attached is everything you will need to figure out what is what.

Sounds like a lot but it really isn't. 2-3 hours. I wish I would have done this months ago!

Ford Bronco Tail Light Flicker - PWM frequency adjustment C2280D CONNECTOR2
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JBlanco

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No Forscan was used.

Amber Signal:

The amber turn signal wires were physically run from the BCM. If you've ever installed a stereo system...speakers and an amplifier in the cargo area or trunk of a vehicle, this will be easy, running 2 turn signal leads from the BCM is a cakewalk (see attached C2280D CONNECTOR.pdf and C2280D CONNECTOR2.jpg for connector pinout info)

Tail light Park Lamp flicker:

This was the easiest. No need to remove the tail lights. Simply slide back the cargo area interior side panels to gain access to the rear of the tail lights. On both the right and left tail lights, find the blue with grey stripe park light wire, splice it, install your relay (I used a SSR). You will need a constant, hot at all times, 12v power source for the relay. If you understand what a relay is used for and how to install one to do what you need it to do, this will be easy.

Basically, doing this bypasses the 12v BCM tail light lead, which has a PWM signal that causes flicker in OEM LED park lights on Broncos originally equipped with OEM Halogen. The relay uses the BCM lead as a switch to power on/off your tails like OEM and the tail lights are powered by that clean 12v source.

Attached is everything you will need to figure out what is what.

Sounds like a lot but it really isn't. 2-3 hours. I wish I would have done this months ago!

C2280D CONNECTOR2.jpg
Great information! Thanks.
 

can6fan

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@PetePerkins, I second the great information. Looks like the C2280D Connector2.JPG only uploaded in low resolution, and it is impossible for my old eyes to see the pinning. From comparing the wiring diagrams you actually ran 2 additional wires to each taillight. And to confirm, you didn't make any ForScan changes at all?
 
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PetePerkins

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@PetePerkins, I second the great information. Looks like the C2280D Connector2.JPG only uploaded in low resolution, and it is impossible for my old eyes to see the pinning. From comparing the wiring diagrams you actually ran 2 additional wires to each taillight. And to confirm, you didn't make any ForScan changes at all?
I ran 1 turn signal lead for each taillight. I didn't run the turn outage lead (bulb outage was previously turned off in Forscan when I initially installed the LED tails, to stop hyper flash). No need to run a ground lead.

The LED wiring schematic that shows wire colors also shows the pin location number for each wire exiting the C2280D connector at th BCM.
 

BKinCT

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Did anyone determine if there is a Forscan edit to fix the flicker? Or do you need to add resistors in order to work on stock Halogen build?
 

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Alvrz

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witch module to make the change to stop hyper flash?
 

Duboval

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You have a link to the relay you used? I have noise coming from mine. I’m guessing it can’t handle the pulse from the trigger wire.
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