Presently rebuilding a harness with a 1227747 ECM. Original was after market but worked ok.
Question 1. B+ goes to ECM A6. Should it be continuous or switched from the key?
Q2. B+ to ECM B1. Continuous or switched?
Q3. If neither A6 or B1 are continuous how does the ECM maintain RAM ?
Q4. ECM B10 (P/N signal) needs to be grounded? My engine runs with no wire in B10. Detrimental?
Q5. ECM C9 should see cranking voltage? No wire here either. Detrimental?
Q6. Is fuel prime determined by the ECM or the BIN? I'm using AKAH BIN. Pump runs a long time before I turn the key to start position.
2 seconds should be plenty? 20 seconds max? It's in a 49 Jimmy not a MH.
Thanks for any help. I've got a lot to learn.
Bob.
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