TylerEggs
New member
- Thread starter
- #1
Hey everyone,
I've been reading the forums here for some time and finally got around to adding the brake controller to my 2024 Flash trim. My truck came with no listed towing packages, but it did come with the trailer backup "assist" knob.
After reading, I decided I'd start with just trying to add the Trailer Brake Controller in the dash (ML3Z-14529-AC) which ran me about $75USD. So, I popped it in (and I should mention I'm decently proficient with Forscan) and opened up the module and enabled Trailer Brake Controller and a couple other ones (there's three bunched together). For the record, the black box under the dash at the time was the factory one (ML3T-19J295-GA).
What happened after is kinda what I expected, which was basically nothing. The towing screen would show the gain adjustment level, but the buttons on the controller wouldn't do a thing. So, my next step was to order the module that goes under the dash. I popped onto eBay and bought a used one that I believed had the correct guts to actually control the trailer brakes (MU5T-19J295-HJ) and I got that for $64USD. It showed up, two harnesses to swap and a quick 30 seconds later the new one was in. I tried the brake controller....still nothing.
The key was changing the values associated to the attachment below. I can't remember who posted it, but it is pure gold when it comes to enabling this correctly.
I made the changes the highlighted values and the trailer brake controller came to life. I've tested and verified with a travel trailer that it now works. $140USD instead of $240 USD for the "Kit" (RL3Z-19H332-AA).
Hopefully this helps !
I've been reading the forums here for some time and finally got around to adding the brake controller to my 2024 Flash trim. My truck came with no listed towing packages, but it did come with the trailer backup "assist" knob.
After reading, I decided I'd start with just trying to add the Trailer Brake Controller in the dash (ML3Z-14529-AC) which ran me about $75USD. So, I popped it in (and I should mention I'm decently proficient with Forscan) and opened up the module and enabled Trailer Brake Controller and a couple other ones (there's three bunched together). For the record, the black box under the dash at the time was the factory one (ML3T-19J295-GA).
What happened after is kinda what I expected, which was basically nothing. The towing screen would show the gain adjustment level, but the buttons on the controller wouldn't do a thing. So, my next step was to order the module that goes under the dash. I popped onto eBay and bought a used one that I believed had the correct guts to actually control the trailer brakes (MU5T-19J295-HJ) and I got that for $64USD. It showed up, two harnesses to swap and a quick 30 seconds later the new one was in. I tried the brake controller....still nothing.
The key was changing the values associated to the attachment below. I can't remember who posted it, but it is pure gold when it comes to enabling this correctly.
I made the changes the highlighted values and the trailer brake controller came to life. I've tested and verified with a travel trailer that it now works. $140USD instead of $240 USD for the "Kit" (RL3Z-19H332-AA).
Hopefully this helps !
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