GTR0419
Member
- 82
- 24
- 8
- Location
- Atlanta, GA
Just a quick picking of the brains before I start any unnecessary troubleshooting. I am resurrecting an M1078. Installed four new 31 series batteries, all new circuit breakers, semiconductors, and relays. She's breathing, but won't even try to crank. All four batteries show 12 volts, volt gauge reads about 25, main switch does activate panel (I disconnected alarm for sanity's sake) and there is power at the start button. All wires/ connections look good inside cab and on engine. However, I have not installed the trans ECU and selector. Given the interaction with the Trans ECU and engine, would the ECU's absence cause this? Any other quick tips? TM suggests checking compressor, but it seems the engine should still turn.