Shadetree Ltd

Once in a while the truck starts throwing a number of codes and it is usually all the same ones 24, 33, 41 and 45. The PO replaced the battery and the alternator. When the codes sre on it is charging at 9 or so and when there are no codes (no check engine light on) it charges at 14 or so. Any thoughts?

Scott

wannadiesel

Sounds like the connector on the PCM is cruddy (or the PCM is flaking out). Try unplugging and reconnecting the PCM a few times, then spray the connections with electrical contact cleaner, let it dry, hook it back up and see how it goes.

Shadetree Ltd

I will try that, I was wondering since they are all open relays and the field circuit if they could be connected or tied together with something else.

wannadiesel

That was the only thing I could think of that would throw so many codes at once - other than a bad PCM.