Blowing fuse no. 74

Tiny
JEFF RITT
  • MEMBER
  • 2008 FORD F-550
  • 6.4L
  • V8
  • 2WD
  • AUTOMATIC
  • 245,000 MILES
Blowing fuse no.74. Have high pres fuel pump cover, no chaffing of wires or short to ground when solenoids on HPFP are disconnected there is no shorts
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Wednesday, August 24th, 2016 AT 12:03 PM

3 Replies

Tiny
HMAC300
  • EXPERT
This fuse goes to a bunch of things, it's an engine harness check to see if it's rubbed through on frame or engine it's grn/wht wire goes to mass air flow, accelerator pedal as well as glow pulg module. Have it scanned for codes to see if anything gets picked up
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Wednesday, August 24th, 2016 AT 4:10 PM
Tiny
JEFF RITT
  • MEMBER
When I unplug four wire connector to HPFP, the fuse stays intact. It is when I plug four wire connector together the fuse blows. This is why I think it is in one of the components on HPFP.
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Wednesday, August 24th, 2016 AT 8:44 PM
Tiny
HMAC300
  • EXPERT
The the pump is probably drawing to many amps or a short in that wiring
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Thursday, August 25th, 2016 AT 5:27 AM

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