I've installed a new cummins engine and replaced my v10. After several hours of hair pulling I've got the truck running after replacing pcm with a 2001 the ecm and engine harness including the harness/fuse Box under hoodwiring are from a 2000. I do not have power to run the alternator unless I remove the trans relay and jump it as if I'm installing a converter lock up switch. I can communicate with both with a scan tool and have ecm codes for intake air heater but it is disconnected. The trans is showing codes for trans relay which would be expected. And charging circuit.
The question I have is I can make it charge but if the trans is getting 12 volts and 5 volt ref. What in the pcm other than the speed signal would make the trans shift?
Would the under dash wiring have anything to do with that communication?
I've been reading a bunch of other posts and looking at the diagrams posted but haven't really come to any conclusions.
I can make the alternator charge but just really need to get this trans to work.
I might be able to get ecm flashed to match the 01 pcm but think wiring could
be the problem.
Engine is just rebuilt as well as trans which worked behind the v10 after changing the input shaft and converter it should be fine.
THOUGHTS?
The question I have is I can make it charge but if the trans is getting 12 volts and 5 volt ref. What in the pcm other than the speed signal would make the trans shift?
Would the under dash wiring have anything to do with that communication?
I've been reading a bunch of other posts and looking at the diagrams posted but haven't really come to any conclusions.
I can make the alternator charge but just really need to get this trans to work.
I might be able to get ecm flashed to match the 01 pcm but think wiring could
be the problem.
Engine is just rebuilt as well as trans which worked behind the v10 after changing the input shaft and converter it should be fine.
THOUGHTS?
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