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Old 12-23-2009, 10:26 AM   #2
srteach
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Join Date: Aug 2007
Posts: 978
Vehicle Year: 1999, 2001
Vehicle Make: Ranger, F350
Vehicle Model: XLT supercab, SuperDuty
I use this vehicle for: DD / light OR, DD
Rep Power: 25
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Indications lead me to suggest amperage short. Look for a frayed wire in the neutral side of the turn signal. When the truck is in motion, more amperage is available for the turn signals. This amperage (if it shorts on the neutral) would add to the turn / backup amperage and blow the fuses.

MAYBE
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