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May I ask why you are trying to put a DDEC II ECM onto a DDEC IV vehicle? Did you change the engine or something?
CLICK HERE or CLICK HERE or CLICK HERE for this is all the resources I have on the DDEC II wiring. Couple of these are for the Peterbilt, but they are the only ones that list a diagram for the DDECII still. No one else does. Even the manual section I posted is from an old cab over manual I have.
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