duct tape & zip ties
Join Date: Jul 2006
Location: Willis, MI
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How Old are the batteries? You have replaced the alternator but you state nothing about the batteries being checked or replaced. Also did those places even bother bench testing the alternators or just warranty them out? Put the batteries on a trickle charge for a few hours each. That means pull the batteries out, hook them to a battery charger one at a time. Put the battery charger on 12volts at 15amps for about 4 hours. Then check the voltage and amperage of each battery. If the amperage is not near the battery rating. Most likely you have found your problem.
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Your Actions Today, Decide Your Future Tomorrow
2005 6.0 Crew Cab Long Box Lariat, current truck
2004 6.0 destroyed by contaminated fuel
2002 7.3L burnt