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There are 2 main causes for the CC to quit working suddenly.

1- Voltage short at the switch located in the steering harness.

-Solution:

-Replace switch obtained at local dealer , $130-$164

-Replace fuse/relay located in kick panel and under hood, $2-$15

2- Vacuum Leak Located either behind the brake master cyl. or integrated in to it.

-Solution:

-Test for vacuum leaks:

* 1.Buy a can of "Starting fluid"

2.Start engine, let idle until norm. operating temp.

3.Spray (while @ idle) starting fluid onto and around all vacuum lines.

4.Listen for rpm spike. If engine revs up in any way you have a leak and the line(s) must be replaced.

- Check Brake master cyl. for cracks (Crystler likes to use plastic vacuum resevoirs)

MrInFiNiT3

Jake- ASE Master Certified Tech. 2008

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Q: Why would a 2003 jeep wrangler cruise control quit working?
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