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Old 08-09-2009, 05:19 AM
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Cruise Control Problem

Have an 05 Expy w/74,000 miles. We just made a trip have way across country and back, and the cruise control starting shutting it self off. At first it was after we used it for a while, then it started shutting off right after we set it. My father-in-law thinks it's just a vacuum leak that can be fixed pretty inexpensive. Has anyone else had this same problem? If so, what was the cause?
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Old 08-09-2009, 07:18 AM
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The 05 Expy doesn't use vacuum for the cruise (it's all electronic and is controlled by the PCM) so Dad's idea won't pan out.

Have the system scanned with a scan tool that is capable of reading "manufacturer-specific" codes as any speed control fault will be logged by the PCM, same as an emissions fault but without a visual fault indicator.

Common failures include the deactivator switch, the BPP switch, and the clockspring.
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Old 08-09-2009, 08:24 AM
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Thanks for the info, will have it checked out.
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Old 08-13-2009, 03:35 PM
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If the airbag light comes on too.It's more than likely the clockspring.
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Old 08-14-2009, 04:30 AM
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The airbag light doesn't come on.
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Old 08-14-2009, 01:40 PM
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is it turning the cruise off entirely, or just disengaging it?

if it's dis-engaging, as Project said, it's going to most likely point to one of the switches.
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Old 08-14-2009, 07:04 PM
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Those units had a Ford Recall I think (check with your dealer). Just ask your dealer if the cruise control recall work was done on your SUV.
Sounds as though you have a switch problem and I don't know if the switch is replaced under the recall or not. Seems as though a fuse is installed in the circuit on the recall.
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Old 08-14-2009, 09:10 PM
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Those units had a Ford Recall I think (check with your dealer). Just ask your dealer if the cruise control recall work was done on your SUV.
Sounds as though you have a switch problem and I don't know if the switch is replaced under the recall or not. Seems as though a fuse is installed in the circuit on the recall.

No, the speed control recall did not affect the 05s.
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Old 08-14-2009, 09:51 PM
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We already checked the recall, it didn't affect the '05's as project said. It's turning it off completely.
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Old 08-14-2009, 11:00 PM
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I don't know how to check the clockspring, but to test if you are losing power to the system, check the yellow /lt blue striped wire coming off fuse 5 in the distribution block. It goes through the horn relay and comes out dark blue then goes into the clockspring.

Might be worth probing it and giving the connections a shake. Or, check fuse 5 (20a) who knows maybe it's loose, or the horn relay is starting to crap out.

Since it's turning off all togethor, I think you can rule out the brake pedal and speed sense switches, but could be wrong.
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Old 08-15-2009, 04:02 AM
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Thanks for all the suggestions. Will look into them when I get some free time.
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Old 08-15-2009, 04:02 AM
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