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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
Wednesday, August 24th, 2016 AT 12:03 PM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
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
  • 2 POSTS
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
  • MECHANIC
  • 48,601 POSTS
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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