2001 Edge 4.0L cruise control help, please!

[TraderMark]

I know I don't post here much, but I could really use some help.

2001 Ranger Edge Ext cab 4.0L Auto.

My cruise control stopped working out of the blue.
It worked fine Thursday and this evening it won't work at all.
When I try and set the cruise control, nothing happens. No dash indicator light, not even a flash, and no cruise.

I've checked the fuses several times, both are good.
I've checked the switch on the MC and it's functioning properly.
Brake lights operate normally, nothing squirrely with them.
I ran the cruise control self diagnostic and got 2 flashes at the end which should mean a bad BPP or a defective circuit.

Here's the part I don't understand.... If the brake lights are functioning properly, how can the switch or the circuit be defective?

Thanks in advance,
Mark

 

[snake]

could be that switch at the end of the master cylinder, it was a huge recall sometime back. My understanding is its a backup switch if the brake lights don't work it will still kick off when u hit the brakes. Edit- silly me, I reread and u already checked it. Try checking the clock spring that would be my next guess

 

[adsm08]

I want to know how you are do sure the pressure switch is operating properly. The only way to verify its operation is with a scanner, and it sounds like you don't have one.

In my experience it is the most common cause of in-op cruise.

The brake light circuit could still be at fault. There are two legs of it, one going to the lights themselves, and one going to the cruise module. If there is a problem with that second leg it would set that code but leave the lights unaffected.

 

[TraderMark]

adms08... "The brake light circuit could still be at fault. There are two legs of it, one going to the lights themselves, and one going to the cruise module. If there is a problem with that second leg it would set that code but leave the lights unaffected."

Yeah, I was tired, wasn't thinking, was frustrated and didn't even consider the fact the switch could be a multi-circuit switch.

Any way, so often people post problems like this and never post the remedy or action to correct the problem, so here's what I finally found.

I bought the truck used, 2 years ago. It had an electric brake controller in it when I got it, but the controller was unplugged. I didn't need the controller at the time so I thought nothing of it. A few days ago I acquired a trailer that has electric brakes so I plugged the controller back up inside the truck, but I haven't hooked the trailer to the truck as of yet.

Come to find out, the yahoo that installed the electric brake controller in the truck wired the controller input wire to the cruise control part of the brake light switch instead of the brake light part. Having it wired that way shorted out the cruise circuit and burned one of the wires in two for the cruise circuit. Repaired the broken/burned wire, wired the brake controller into the proper circuit and all is well again.

Thanks for the help!!!

Mark