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2002 Ford F-350 truck stop running.

Tiny
WMJC4308
  • MEMBER
  • 2002 FORD F-350
  • 7.3L
  • V8
  • TURBO
  • 4WD
  • AUTOMATIC
  • 128,000 MILES
Removed PCM power relay and the injector drive module power relay. Installed new fuse and fuse didn't blow, engine turned over. Put PCM power relay back in and fuse blew. Removed relay and replaced fuse, put injector driver module power relay back in. Changed fuse. Fuse did not blow and engine turned over. Inner changed driver module with another driver module with same number, installed into PCM power relay port an fuse blew. Need help, what do I do next metered out modules reads okay. My PCM is not install. Is more PCM related component.
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Tuesday, July 15th, 2014 AT 2:41 PM

1 Reply

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
You really haven't proven much of anything yet. The PCM power relay operates many things, including the injector driver module so having either relay unplugged interrupts the power flow to the injectors. The PCM relay also powers the fuel pump relay.

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Tuesday, July 15th, 2014 AT 3:23 PM

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