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November 1, 1998 Service bulletin

Some vehicles equipped with a dual media radio may exhibit an intermittent or inoperative rear speaker...

Ford technical service bulletin 12158 for 1999 Ford Super Duty F Series.

Bulletin number
12158
Component
Equipment: electrical: radio/tape deck/cd etc.
Summary
Some vehicles equipped with a dual media radio may exhibit an intermittent or inoperative rear speaker (generally the right side) causing by a dual fault condition. Mjs

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