04-08 F150 cluster brake light on problem

**clusters** · 22nd February, 2018, 02:00 AM

Can anyone share the detailed fix for this? In PM if you don't want to post it.

Thanks for any help.

**FxShaw** · 22nd February, 2018, 03:52 AM

Brake light could be on for more than one reasons, what makes you think its related to the cluster though?

**clusters** · 22nd February, 2018, 03:54 AM

Because it's a known problem. I can see by your answer that you don't know the solution.

Break light?????

And if you flex the cluster circuit board the light goes out.

**FxShaw** · 22nd February, 2018, 03:58 AM

Originally Posted by clusters

Because it's a known problem. I can see by your answer that you don't know the solution.

Break light?????

let me edit that... I know of a few issue why the brake light will stay on but you seem to think its related to the cluster so I was curious as to why.

**clusters** · 22nd February, 2018, 04:01 AM

read my edit above

My diagnostic skills are a little better than you could imagine.

**epd1221** · 22nd February, 2018, 06:07 AM

Seen the problem one of my customers , but he was in a hurry to pass emissions he end up replacing with a second hand unit . never had a chance to play with it.

**clusters** · 24th February, 2018, 05:26 AM

Nobody??

Thanks a lot.

**automotrizVIP** · 24th February, 2018, 05:33 AM

I still do not understand your problem, could you please give details ...
note of interest.
use vcm ford in diagnostic view previous or clone for a better %%.
If my memory does not fail me, you should check the liquid, or failing sensor brake

**ascrap2003** · 25th February, 2018, 04:57 AM

Originally Posted by clusters

Nobody??

Thanks a lot.

I have a note that states:

Brake light fix
Reflow Connector and Resistors In Area
Havent tried yet.

I myself could use:
QX56 Fix
Display reflow display or other area as well?
Backlight Off not working, does it have flourecent style tube/strip? Use another from donor?

**ascrap2003** · 25th February, 2018, 05:01 AM

Originally Posted by automotrizVIP

I still do not understand your problem, could you please give details ...
note of interest.
use vcm ford in diagnostic view previous or clone for a better %%.
If my memory does not fail me, you should check the liquid, or failing sensor brake

Your killing me stop!!!!!

There is a cluster issue that also causes brake light issue on some 04-08 F150

**ascrap2003** · 25th February, 2018, 05:08 AM

OH clusters btw did a 07 GMT900 Tahoe typical display issue, my first with blown mosfet tho so replaced mosfet, and gate resistor "looked toasty" but didnt replace driver chip/controller and had wrong resistor size plus resistor pad was fried "think it was partially but I made worse, so I soldered resistor to mosfet gate and ran jumper from other end of resistor to via.

Worked but only after 10-30 seconds warm up! other wise dim. any ideas? You think it was resistor size? Driver chip?

**ascrap2003** · 25th February, 2018, 05:11 AM

Originally Posted by FxShaw

Brake light could be on for more than one reasons, what makes you think its related to the cluster though?

Look at the mans name for Gods sake!

**clusters** · 1st March, 2018, 01:20 AM

So, I managed to get this repair done finally. The brake light was staying on and the interior lights did not work unless you flexed the circuit board.

Powering it up on the bench doesn't really offer a good way to recalibrate the needles, so mark them carefully with tape at the bottom stops before turning them clockwise past the stops and pulling them off with your fingers.

Powered up on the bench you can't test the brake light function either, because with no input from the ABS module the ABS and brake light will be on so confirming repair has to be done in the truck.

A reflow of the surface mount resistors marked in the picture (front of the circuit board) solved all the problems. Reflow all the ones circled in red.

I did find one resistor under the other connector that was cracked as well (no pic), and may have prevented a future problem.

F150.jpg