My 04 f150 fx4 has some cruise control issues. The cruise doesn't work at all and the self test doesn't do anything on my truck either. I tested the disengage switch which tested good but replaced it anyway for $21. I've checked all brake lights and replaced the 3rd light which was burned out. I've unplugged the brake switch and reconected in case of loose connection with no luck. I removed the brake switch and tested as follows (please correct me if my test method is flawed): top to bottom pins 1-6 for sake of this discussion. Pins 1 and 2 no continuity until brake button is pressed. Pins 3 and 4 are blank so no test performed. Pins 5 and 6 tested the same as 1 and 2 so am I correct in saying the switch is good? My truck will shift through all gears and back without ever applying the brakes. Bad shift interlock inside the shift console? I haven't torn into that yet but it's the only thing left I can think of. Is there any tests to be run on it with a multimeter? Thanks

 

Just to update, I have resolved this issue and it was the shift interlock in the console. I replaced it worth one out of the salvage yard and it worked fine. I opened it up to try and see how it works and found a transistor that looked burnt so I ordered a new one that I'm planning on soldering in to see if that would have been a workable fix. I'll post the results for anyone who might want to give it a try.