Quote Originally Posted by stew86MCSS396 View Post
Pulled unmolested '7747 off the shelf and meter set on continuity, on initial probe numbers on the meter jump around then goes open audible chime never chirps. Meter set at 20k I get the same behavior on the readout. Meter set on 200k, there is resistance on the meter. Pardon me but what are those yellow wires for? Have you tried making on the fly changes w ostrich and with that said, is the checksum disabled?
So I put my meter across those pins, and it tones instantly. Not a good sign I guess. This is a 299 ECM. But I guess they're pretty similar?