With the cruise turned on, I hit the "SET" button. The green dash light comes on only briefly and the cruise does not engage. The cruise will engage 1 out of 10 times. Is there something sticking I could spray to correct this?
'03 Sport trac w/70,000 miles. Started around 60,000 mile mark with light flashing briefly, only engaging 1in 10 times. Also, I noticed slightly decreased gas mileage around the same time.
Cruise Control problem corrected itself when I replaced the spark plugs and wires. Owners manual reccomended replacing plugs and wires at 100K. Do yourself a favor and replace them early. They were very difficult to get out. I noticed arcing from wires to block and several areas of friction damage to insulation. Wrap new wires with sheathing and tie wraps to prevent friction problems in the future.
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Remove RCM fuse from dash panel fuse box. Fuse F2.10 10 amps. Turn key onfor 30 seconds and see that Air Bag light is lit. Now disconnect battery negative cable for 1 minute, leave disconnected while service is done. now the air bag is disabled. To repower the system turn key on, insert fuse. connect battery, now turn key off for 10 seconds, then turn key on and watch the air bag light. it should go on then after the air bag module is happy that everything is ok, it will turn off.
If you can please look under the hood and find the Air filter, and follow that all the way to a round metal part (Throttle body) If you can see it there will be a coil,and on that coid will extrude a curved plate with a cable(throttle cable) attached to it running all the way back inward toward the back of the engine, and next to that there should be a second cable (crusie control cable). This cable is pulled on when you engage the cruise control, by a black box next to the fuse box.
If the Cruise control cable is near by try to reattach it and if it is damaged then have your dealership or some one mechanically inclinded to replace the tip ( if plastic) or replace the cable.
If that didnt help please get back to me
Th is is how I fixed mine! Down on the brake pedal there is a small plastic box about 1 1\2 * 1 1\2 in size. It's called the brake stop light, I think. This part disengages the cruise when the brake is pressed. Not sure on it's other uses! Remove the clip from the part where it attatches the the pedal. For more working room you can remove the plastic keeper. The box has three keepers on it. Pry them out gently to remove the top. Two of the copper pieces inside will have contacts on them about the size of a match stick head. Take them out and clean them with an eraser. This solved my problem, I hope it solves yours. Let Me KNOW!