2008 Jeep Grand Cherokee – update revised computer software

Dear Doctor: I own a 2008 Jeep Grand Cherokee with 14,000 miles on it. Every once in a while my radio stops working while I’m driving. It comes back on randomly. And on one occasion the power windows did not work. The dealer changed the radio, but the problem is still there. Any advice? Arnold

Dear Arnold: Your Jeep, like many other newer vehicles, has multiple control modules to operate accessories. The first step is to check for trouble fault codes in the body control module. This requires a professional scan tool, not a small inexpensive universal scan tool. An updated revised computer software reprogram may be needed. The loss of the power window operation can also indicate a loss of 12-volt power from the ignition switch. The technician will need to check all possibilities. It would be great to have the problem examined when the radio is not working. Unfortunately, there are no easy fixes.

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