Joey Mack Posted 4 hours ago Share Posted 4 hours ago Man I hope you threw a ringer...... Quote Link to comment https://www.bigmacktrucks.com/topic/76364-another-mp7-no-crank-no-start-with-history-of-burned-ecm%E2%80%99s/page/2/#findComment-594743 Share on other sites More sharing options...
96bulldogpower Posted 4 hours ago Author Share Posted 4 hours ago 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76364-another-mp7-no-crank-no-start-with-history-of-burned-ecm%E2%80%99s/page/2/#findComment-594744 Share on other sites More sharing options...
96bulldogpower Posted 4 hours ago Author Share Posted 4 hours ago On 3/4/2026 at 11:38 PM, Mackpro said: Also, does the bad ECM’s smell burned? I’ve had several that you could smell it as soon as you unplugged the connectors. Some had melted pins even. Also look and see if there is a bracket that’s is bolted to the air compressor head that holds the chassis harness before it plugs into the engine harness at the big green connector. Seen the power wire for engine ecm rub and short out on this bracket. Usually it blows the engine ECm fuse but not always. Oh the ecm’s were absolutely burned internally. We opened one up and it was charred. I did go through all the wiring from the battery in search for shorts, even as much as I could through the cab but I found nothing. I’m thinking it was something in the engine harness. Quote Link to comment https://www.bigmacktrucks.com/topic/76364-another-mp7-no-crank-no-start-with-history-of-burned-ecm%E2%80%99s/page/2/#findComment-594745 Share on other sites More sharing options...
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