no power to fuel pump

1990 FORD E-SERIES VAN
266 MILES • 6 CYL • 2WD • AUTOMATIC
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JBRACHMAN
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  • 6 POSTS
I have a 1990 E350. 4.9L Inline 6cyl. Just overhauled. Not getting any power to fuel pump. I'm getting 12 volts into the relay, but little to nothing out. I can jump the relay & the fuel pump kicks on. (Inertia switch & relay are fine)Could this be a PCM problem? Or could there be a fusible link somewhere? It seemed to work intermittantly for a short bit. I did have a stuck solenoid, so when I tried to reconnect the battery, there was some "excitement."
Dec 4, 2010 at 2:29 PM
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HMAC300
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  • 48,601 POSTS
it still may be your inertia switch. press teh white button on the floorboard to left and above where steering column passes through the floorboard. Also your relay for the fuel pump is the RB relay and #18 is the fuse for it.
Dec 4, 2010 at 4:10 PM
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JBRACHMAN
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Not it. I've bypassed the inertia switch. I can jump the relay from the hot wire in - to the power line to the inertia switch & the pump kicks on.
Dec 4, 2010 at 5:19 PM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
see if you have power to the yellow wire going to the fuel pump relay. If you don't then there is a blue wire running off the starter relay that is a fusible link. that is probably burnt up or not giving power to the yellow wire that its connected to.
Dec 4, 2010 at 5:35 PM
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JBRACHMAN
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There is power to the yellow wire... PCM the only other culprit?
Dec 5, 2010 at 10:25 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
if you have power then it can be a bad connection to the pcm. Idoubt it's the pcm, but could be. I'd check the connection first as it could be a broken wire someplace.
Dec 5, 2010 at 1:24 PM
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