Solved Cruise control not turning on. What fixed my problem

[Wallacemerritt]

I just bought a 2004 sport trac to haul my kids to all of there many practices and for just basic commuting to try to save a little money on fuel in my fuel loving 6.4 diesel super duty and keep the miles down on it. With that being said the cruise control buttons where all busted up so I ordered a set on Amorim to replace them. Straight forward install but still no cruise control. After doing a little research there is a cruise control pressure brake switch/sensor mounted on top of the brake master cylinder. I unplugged the connector and tested for ohms between the two prongs on the switch and I had nothing. I unscrews the switch/sensor and tapped it on a hard surface to get some of the brake fluid out of the switch and I rechecked for ohms and now it was zeroing out I had ohms. The switch was stuck open telling the cruise control system that the brakes where being applied and in turn not allowing the cruise control to turn on. I screwed the switch back in and now it’s working. I hope this helps for someone that may in counter my same problem.

 

[94Eddie]

I replaced this part for the same reason on my 2002 Explorer. My guess is you will probably have to replace it at some point. Also, the brake light switch at the peddle goes bad. I had to replace this in two on the Explorers I have owned.

 

[swshawaii]

Welcome Wallace. Faulty and leaking brake pressure switch is a very common issue and is a Ford safety recall because of a potential fire hazard with the engine off. A few unfortunate EF members had total vehicle losses due to unattended fires. Make sure yours isn't leaking brake fluid. Good luck..

Speed Control Deactivation Switch Recall (09S09)

https://static.nhtsa.gov/odi/rcl/2009/RCMN-09V399-8095.pdf

 

[swshawaii]

Unlike TSB's, safety recalls do not expire. Just to be safe call your local Ford dealer with your VIN.

Here's the actual recall:
TSB and Wiring Diagrams Database Results - BBB Industries - Leading Remanufacturer of Automotive Aftermarket Parts

FREE TSB's and Wiring Diagrams. Quick registration required.
TSB and Wiring Diagrams Database - BBB Industries - Leading Remanufacturer of Automotive Aftermarket Parts

 

[Wallacemerritt]

Unlike TSB's, safety recalls do not expire. Just to be safe call your local Ford dealer with your VIN.

Here's the actual recall:
TSB and Wiring Diagrams Database Results - BBB Industries - Leading Remanufacturer of Automotive Aftermarket Parts

FREE TSB's and Wiring Diagrams. Quick registration required.
TSB and Wiring Diagrams Database - BBB Industries - Leading Remanufacturer of Automotive Aftermarket Parts

I’ll have to give them a call. Is there a way to do it online?

 

[Retroboy1989]

It's not worth the hassle to go to the dealer.

https://www.amazon.com/dp/B000IYLZDO/ref=cm_sw_r_sms_apa_i_6xGlEbG2ZD8H8

You won't need the harness, but this is the cheap way to get the motorcraft part SW6349.

You can test the system without the pressure switch by jumping the terminals of the pressure switch harness and taking a test drive. DO NOT leave it that way as it is bypassing an important safety redundancy required by law.