Join Date: Mar 2007
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Down nest to the starter are 2 wires that power the truck and charge the batteries, they have fusible links on them.
You can test to see if that is the problem by putting a jumper wire from the positive battery to the junction stud at the middle of the firewall that feeds the A/C. If that lights up the truck, fix the wire. The battery cable is often bad at the bottom end, if it has broken insulation at the starter take it off to inspect. A battery shop can replace the end terminal if you don't solder, or you can buy a new one. Don't cheap out on the battery cable get the right gage wire for diesel.
93 Dodge /CTD, IC, 518, club cab LE, BHAF, KDP fixed, kelderman air ride
81 Isuzu /C223na, 5spd