Canman Posted January 15, 2023 Share Posted January 15, 2023 Truck was running died and won’t start new batteries installed new mag switch installed starter is hitting but won’t start Quote Link to comment https://www.bigmacktrucks.com/topic/71059-2013-gu813-won%E2%80%99t-start/ Share on other sites More sharing options...
Onyx610 Posted January 15, 2023 Share Posted January 15, 2023 Start with checking fuses/relays. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/71059-2013-gu813-won%E2%80%99t-start/#findComment-521302 Share on other sites More sharing options...
Mackpro Posted January 15, 2023 Share Posted January 15, 2023 Is the starter turning the engine over? Go into trip data in your dash display and look at engine hours. If you only see dashes for your engine hours then the Engine ECM is not powering up or gone bad. Also the engine ECM controls the ground on the small solenoid that’s bolted to the starter. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/71059-2013-gu813-won%E2%80%99t-start/#findComment-521314 Share on other sites More sharing options...
Canman Posted January 30, 2023 Author Share Posted January 30, 2023 Seems like something worked itself loose connecting to the ecm. It starts and runs great now that we zip tied all the wires up under the hood thanks Quote Link to comment https://www.bigmacktrucks.com/topic/71059-2013-gu813-won%E2%80%99t-start/#findComment-524189 Share on other sites More sharing options...
Joey Mack Posted January 30, 2023 Share Posted January 30, 2023 The gray wires in the truck are the grounds.. have a look at those.. on the firewall is a 'pass through' check it out.. Good luck . The other 2 guys that posted comments are Brilliant,. You are in good hands.. jojo 1 Quote Link to comment https://www.bigmacktrucks.com/topic/71059-2013-gu813-won%E2%80%99t-start/#findComment-524206 Share on other sites More sharing options...
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