2007 Dodge 3500 4wd 6.7 Cummings. TIPM was defective and not Ava from Dodge for 7 days. Installed an aftermarket TIPM and my check gauges, voltage light went away and the alternator is back online BUT I now have no 4wd whatsoever and a indicator warning light of 4wd service required. Since the rebuilt unit came with fuses wonder which one I can swap out that controls the 4wd? Suspect the rebuilt TIPM or needing a re flash on the 4wd to be my gremlin.