Check your alternator is charging and you have battery voltage at starter and check for over charging shouldn’t be more than roughly 14.5V I believe . Check battery voltage. Check all ground connections on engine and frame etc. check wiring, check ecm pins, check starter connections, scan and get codes or take to shop and get a scan done and printed then post it. Probably best as the first step actually. Googling the codes may show related faults and may help narrowing down the code to chase
Check your alternator is charging and you have battery voltage at starter and check for over charging shouldn’t be more than roughly 14.5V I believe . Check battery voltage. Check all ground connections on engine and frame etc. check wiring, check ecm pins, check starter connections, scan and get codes or take to shop and get a scan done and printed then post it. Probably best as the first step actually. Googling the codes may show related faults and may help narrowing down the code to chase