IM NOT GETTING POWER TO THE FUEL PUMP

  • Tiny
  • kevdawg37
  • 1994 Mazda b3000
  • 120,000 miles

Im not getting power to the fuel pump. I have using a circut tester checked for power at, the pump, the inertial cutoff switch and the relay. The relay has power at least to it's socket. No power at all to the rest of the system. The relay appears to be working I can feel it clicking anyway. I connected the fuel pump to an alternate 12 volt source and it does work. I can't figure out where it's grounded. Initially I thought the fuel pump was bad as it was not getting any gas to the rail. I replaced the fuel pump only to discover the the old one still worked. A little lost here.

Thursday, October 11th, 2012 AT 4:19 PM

1 Answer

  • Tiny
  • hmac300
  • Expert
  • 41,700 posts

If you get power to inertia switch then the problem is between there and tank, if not it's between pcm and relay. Check pin 8 & 22 on pcm those go to fp relay.

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Thursday, October 11th, 2012 AT 4:42 PM

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