Hey all. Had a similar issue with this machine a couple years ago. I eventually found a couple of issues (bad connector pins on cab harness & corroded mega-fuse connections) and up until now it's been running well. This time it's very similar except it doesn't loose all cab power. Basically, it starts & begins charging as it should. After anywhere from a couple minutes to an hour or two the voltage on both displays drops off from a charging rate of 13.5 to 14.5 down to eventually 6.5 volts. It takes a while to get that low, but once it drops below 11 volts the LOW VOLTAGE code kicks on.
The controls are dead once the voltage gets too low. It'll sit there and run just fine though. The alternator is still charging as it should when I test at the battery AND all the switched/unswitched power wires, etc. I can't find ANY wires indicating a voltage issue, INCLUDING the wires that feed both display units.
My question, if BOTH displays are receiving proper voltage at the connectors how do they show such low voltage? Do they get the actual voltage input from another source, like the ECM instead of a direct feed off the alt/battery? Is it possible one of the displays are faulty? With the engine off & key on the voltage will fluctuate between 6.5 and 7.0 volts on the displays.
It has a brand new NAPA GOLD battery. I just replaced the solenoid for the air intake heater. It was shortly after replacing the solenoid that this began, although during the winter upon startup the battery volts would stay at 12 volts after starting for up to a minute or two then suddenly begin climbing into the proper range. That was with the old battery which turned out to have some bad cells.
Anyone have any ideas/similar experience....?
The controls are dead once the voltage gets too low. It'll sit there and run just fine though. The alternator is still charging as it should when I test at the battery AND all the switched/unswitched power wires, etc. I can't find ANY wires indicating a voltage issue, INCLUDING the wires that feed both display units.
My question, if BOTH displays are receiving proper voltage at the connectors how do they show such low voltage? Do they get the actual voltage input from another source, like the ECM instead of a direct feed off the alt/battery? Is it possible one of the displays are faulty? With the engine off & key on the voltage will fluctuate between 6.5 and 7.0 volts on the displays.
It has a brand new NAPA GOLD battery. I just replaced the solenoid for the air intake heater. It was shortly after replacing the solenoid that this began, although during the winter upon startup the battery volts would stay at 12 volts after starting for up to a minute or two then suddenly begin climbing into the proper range. That was with the old battery which turned out to have some bad cells.
Anyone have any ideas/similar experience....?