Diagnostic Aids

A short to ground in electrical load idle-up signal circuit between diode module and PCM may cause an open TAIL fuse. An intermittent condition may be caused by a poor connection, rubbed-through insulation, or a broken wire inside insulation. Check PCM harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, or poor terminal-to-wire connections before component replacement.