(posted this at CumminsForum also)
So, I messed up and connected my driver's side battery while the positive and negative cables were touching on the passenger side. Now I'm getting a P2509 (ECM/pcm power input signal intermittent code) and the truck will not even crank. When I turn the key to ON, everything lights up and seems to work as it should. But when I try to crank it, nothing. No click, no nothing. Here's what I've tried:
Checked all the fuses, the only one fried is the trailer 30 amp and looks like it's been that way for a while
I tried shorting the starter relay and it just sparked.
I did a parasitic draw test, 40 milliamps.
Both Batteries are brand new Interstate group 31s and test at 12.8V.
I also noticed that my MM3 reads only 12 volts at the PCM after the grid heater shuts off. Not sure if that is below normal. Anyone care to check what there's is?
What should I check next? Did I fry my PCM?
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