Turn Signal Hyper Flash Solutions: Re-Programming BCM vs. Resistors

M3toSVT said:

This kind of thing makes me wonder if they even did it correctly.

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I'm going back to the dealer tomorrow. I forgot I'm due for an
oil change

I'll have them re-check it again.....

I got my oil changed today...and had service checked the BCM to confirm it was set to OFF.
They confirmed it.

This is something odd I've noticed. When the truck is not "running" the blinkers will flash the "Normal" rate.

When the engine is ON the blinkers will go to the hyperflash...with an occasional hiccup to the normal rate then back to hyperflash.

RC51TOFUMAN said:

I'm going back to the dealer tomorrow. I forgot I'm due for an
oil change

I'll have them re-check it again.....

Click to expand...

RC51TOFUMAN said:

I got my oil changed today...and had service checked the BCM to confirm it was set to OFF.
They confirmed it.

This is something odd I've noticed. When the truck is not "running" the blinkers will flash the "Normal" rate.

When the engine is ON the blinkers will go to the hyperflash...with an occasional hiccup to the normal rate then back to hyperflash.

Click to expand...

That sucks. I have heard that it doesn't work for all trucks. Time to get some load resistors.

Just an update. Went on a road trip. Today my right blinker started to flash at the Normal rate however the left blinker still had the hyperflash

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Forscan.org You can get into the BCM yourself and skip the dealer.

EricM said:

Forscan.org You can get into the BCM yourself and skip the dealer.

Click to expand...

Looks promising. Downloaded the full version. Will report back.

RC51TOFUMAN said:

Just an update. Went on a road trip. Today my right blinker started to flash at the Normal rate however the left blinker still had the hyperflash

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Click to expand...

Voila !!!!!!!!!!!!!!!!!!!!!!!!!
It's working !!!!!!
The BCM Mod.....worked....all of a sudden my flash rate is NORMAL today......Left and Right .......

Maybe it takes time for the BCM to adjust.... ?????
Dunno.......it's been flashing normal rate......ALLLLLL DAAAAAY...... been driving around lol

RC51TOFUMAN said:

Voila !!!!!!!!!!!!!!!!!!!!!!!!!
It's working !!!!!!
The BCM Mod.....worked....all of a sudden my flash rate is NORMAL

Maybe it takes time for the BCM to adjust.... ?????
Dunno.......it's been flashing normal rate......ALLLLLL DAAAAAY...... been driving around lol

Click to expand...

@RC51TOFUMAN, Thanks for rubbing it in, hahah. my dealer is chasing the ghost at the moment. Which BCM mod are you referring to? Is it turning the low voltage scan off in the bcm?

MatMan said:

@RC51TOFUMAN, Thanks for rubbing it in, hahah. my dealer is chasing the ghost at the moment. Which BCM mod are you referring to? Is it turning the low voltage scan off in the bcm?

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My friend.....I'm talking about this one....... in which...
they use the IDS Tool to turn OFF the HyperFlash fault simulating that you have a burnt out bulb on the turn signals. Read this bulletin
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this has been posted before.....hopefully this helps you

Thanks amigo, I passed that on to the Service advisor.