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99 F250 codes


Nailzs

New Member
Joined
Aug 8, 2007
Messages
97
Reaction score
0
Points
0
Age
37
Location
salisbury, md. east of cheasapeake bay
Vehicle Year
1996
Make / Model
Ford
Engine Size
4.0l
Transmission
Manual
hey guys
a friend of mine(who is, hot damn, real cute!) asked me to find out what 2 codes mean on this truck

P1105 Dual Alt Upper Fault
P1106 Dual Alt Lower Fault

now obviously i know what the codes mean, my question is really how to diagnose and what might have caused these to come on
the truck does have dual alts, but i have seen while researching this that trucks w/o dual alts had these codes also, but havent seen where they were fixed

can any of the ford diesal techs that im sure we have help me out on this?
 

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