I have seen on several occasions where a pin in the diagnostic connector was not locked and all the way in place and when the adaptor was plugged in it would push the pin out of place and not connect.
When the adaptor plug was removed the wire would push the pin back into the connector so it looked normal.
Problems hooking to older Cummins ecms…
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by High Stepping, May 23, 2024.
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