Join Date: Jun 2013
Location: Salt Lake City
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2002 F350 Alternator and trouble codes
P0562 - Low Voltage
P0381 - Glow plug heater indicator circuit
P0603 - ICM Keep alive memory
Last night I was driving home and the ABS light came on. Then my brake controller stopped working. the cigarette lighter LED went out and then the radio, followed by the instrument cluster. Lights, tails, just dead.
Indicative of an alternator, right? I replaced it and it did the same thing within 20 minutes. Tested the old alternator and it's definitely bad. The new one tests good. I tried 2 different alternators just for kicks. Same thing happens every time.
The codes all just mean the batteries are dead or lost voltage so nothing really "telling" about them.
Any help would be appreciated. Did I cook my batteries? I did notice voltage dropped to ~6v while everything was going out and then once I was running blind with no lights the voltage shot up to ~16.2v.