Try pulling the parking brake lever up. If it goes away, then you know where the issue lies. They loosen up over time.
I've shimmed my parking brake switch.
Good luck.

 

Try pulling the parking brake lever up. If it goes away, then you know where the issue lies. They loosen up over time.
I've shimmed my parking brake switch.
Good luck.

Like I said, both switches including the brake pedal switch are 100% good. I use the park brake daily, but thanks

 

I'm not talking about the switch itself... If there is too much slack on the ebrake pedal when it's released, it will not make full contact with the switch, and cause the light to turn on.
Try this, with the parking brake released pull up on the pedal and see if the light goes out.

Good luck.

 

Did this occur after a brake job? If so damage to the ABS craptroller from not opening the bleeders when compressing the pistons.

 

I always bleed out the calipers but would is there a link between the caliper/wheel speed sensor and the light?? I can't make the connection looking at the schematic......let me know because this is my best lead and what I was thinking but I just cant see how the two would be connected electrically. Thanks!!

 

Don’t know of hydraulic or electrical connects to the speed sensor. However most Youtube’s stress damage to the ABS controller if bleeder is not cracked when collapsing caliper pistons. I’d be inclined to flush the system as a next step.

 

Thanks, The strange thing with my issue iis lts the Park Brake warning light is on. In most cases isee involving the abs controller/module the abs light is on. My fluid is good, new with the replacement master. Again because it came on with a flicker and then finally stayed on full time (and did this multiple times over about 2 weeks) it really leads me to think wiring or ground issue but I can't find where the circuit grounds. There's only 2 switches in the circuit I can see. 1) the switch at the foot pedal 2) the low fluid sensor /switch in the master. It looked like a trailer light flickering with a bad wire connection. (if that helps)

 

Agree w/ you. Wet symptom event helps confirm a connector/ ground/ harness issue. I don’t have access to wire diagram or PCM interface. I have heard of moisture issues at the PCM connectors (2).
Simple enough to disconnect and spray w/ electronic cleaner as a cleaner/safe water displaced. Assuming brake harness interfaces w/ it.

How Do You Reset the Brake Warning Light on a Ford F-150?

Resetting the ABS brake warning light on a Ford requires setting the ignition switch to run, disconnecting the vehicle's power and allowing a system reset before reconnecting it. The other brake warning light is a low fluid, or low pressure, indicator that self-extinguishes with the problem's...

www.reference.com

 

Thanks for the reply!!! The article brought something up I never thought of, the low pressure issue. Maybe I have an issue with the vacuum pressure going to the system, I'll look into this tomorrow. The turbos do have a mechanical vac pump and plastic fittings to the master .......brakes still feel good but still could have low pressure.