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mayhem1 · 08-07-2019, **(Subject: 2007 Mack MP7 cranks, no start )**

No communication to engine ecm. Both power wires are good to ecm, all terminals and battery cables are clean and tight. I have read where the fuseboxes go bad but not sure which one(one on top of dash, one by clutch pedal) nor what symptons are to have to replace them. All fuses are good. If won't communicate with mid 128 on the dash, Jpro, or Tech Tool. Any direction someone could give me would be major help! TIA!!

tree98 · 08-07-2019, **(Subject: 2007 Mack MP7 cranks, no start )**

Total shot in the dark here.... bad ECM ?? Can you verify the ecm is getting power?

mayhem1 · 08-07-2019, **(Subject: 2007 Mack MP7 cranks, no start )**

Yes I have 12 volts on both power pins of ecm.

Creek · 08-23-2019, **(Subject: 2007 Mack MP7 cranks, no start )**

Is it getting fuel?

RPM1 · 08-23-2019, **(Subject: 2007 Mack MP7 cranks, no start )**

U can go in line and get a diagram for fuses , i think there's like 2 0r 3 to run the thing , allot of mack stuff on line for codes trouble shooting and what not , i ran a 07 mp7 mack for a bit , check wiring harness for injectors , comes out back of head , check the plug , clutch pedal switch fuel lines cracked looses prime , when u crank dose tac work, did it run one day an not the next ?