GGTtexas Posted 7 hours ago Share Posted 7 hours ago (edited) I have a 2012 Mack pinnacle chu613 with the mp8 that is having a no crank issue. I parked the truck in our lot, came back a day later and had a no crank issue. Automatically assumed starter since I tried to jump it at the solenoid and had no response. After replacing it still had a no crank issue so I started diagnosing the system the next day I come back and the truck would only get power to the dash in the crank position found the pre ems relay burned out replaced it and got power to the dash at run position again but was resetting power every 5 seconds found fuse 7 for ignition start burned out so I replaced it as well and have constant power back to the dash however when I try to crank it blows the fuse again. Noticed my engine hours have dashes would a bad ECM cause my blown fuse issue or am I dealing with wiring that is causing both? I have power to pins 57 & 60 on my ecm but it is also not reading engine diagnostics on truck all others are reading. Edited 7 hours ago by GGTtexas Quote Link to comment https://www.bigmacktrucks.com/topic/75643-possible-ecm-issue/ Share on other sites More sharing options...
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