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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

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Old 09-14-2009, 02:22 PM
inkmanj inkmanj is offline
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1998 ford f150 no voltage to fuel pump

have replaced fuel pump relay,checked shutoff under dash,checked fuselink,??????????????
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Old 09-15-2009, 07:03 PM
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Quote:
Originally Posted by inkmanj View Post
have replaced fuel pump relay,checked shutoff under dash,checked fuselink,??????????????
Where is your fuel pump relay?

Im in the same boat. Mines a 91 F150 and their is no power to the fuel pump. Im thinking its my EEC (computer) but want to replace the relay 1st.
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Old 09-15-2009, 08:25 PM
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DarkNite,
The relays:
Click the image to open in full size.

Click the image to open in full size.

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Old 09-16-2009, 08:30 AM
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Subford, THANK YOU!!!!!!!!!!!!!!!!!!!!!!
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Old 09-19-2009, 05:07 PM
turbolaser turbolaser is offline
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I just had same problem with my 87 f250. If the relay does not fix it start check wires for proper voltage before you replace the eec. I had a corroded wire in my wire harness that was only allowing 3 volts to get thru instead of the 12 volts that it should of had. It took me about 3 hours of traceing wires, testing with meter and unwrapping electrical tape from the harness but i found it. Cut out the bad spot and soldered in new wire and now i have power to the pump again. Always test before buying electical parts, since they can'nt always be returned if it did not fix the problem.
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Old 09-19-2009, 08:17 PM
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I just had same problem with my 87 f250. If the relay does not fix it start check wires for proper voltage before you replace the eec. I had a corroded wire in my wire harness that was only allowing 3 volts to get thru instead of the 12 volts that it should of had. It took me about 3 hours of traceing wires, testing with meter and unwrapping electrical tape from the harness but i found it. Cut out the bad spot and soldered in new wire and now i have power to the pump again. Always test before buying electical parts, since they can'nt always be returned if it did not fix the problem.
I replaced the Fuel pump relay and it fired right up...went to bolt the bracket back up and it shut off. Got to playing around with it and it seems to be the connection to the EEC relay. So Im going to replace that and see if it fixes it.
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Old 09-30-2009, 09:57 PM
ksmith3838 ksmith3838 is offline
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so my 92 f150.. relay not kicking on.. where is the EEC module?? thanks
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Old 10-01-2009, 06:42 AM
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so my 92 f150.. relay not kicking on.. where is the EEC module?? thanks
Your PCM is behind the drivers kick panel.
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Old 10-01-2009, 07:36 AM
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Check the fusible links to the relays. Fuel pump relay and the EEC Relay.
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Old 10-01-2009, 07:48 AM
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Check the fusible links to the relays. Fuel pump relay and the EEC Relay.
The only fusible links on a 92 are for the alternator and main power. If the main power fusible links are open the truck would be dead with no power to anything.
He might want to check all the fuse in the engine compartment fuse/relay box.
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Old 10-01-2009, 07:53 AM
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Quote:
Originally Posted by inkmanj View Post
have replaced fuel pump relay,checked shutoff under dash,checked fuselink,??????????????
See thread:
http://www.ford-trucks.com/forums/88...not-start.html

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Old 10-01-2009, 10:13 PM
ksmith3838 ksmith3838 is offline
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Quote:
Originally Posted by subford View Post
Your PCM is behind the drivers kick panel.
Nope not there... neighbor said he thought it was behind the ash tray... according to electrical drawing it should have like 48 wires on it... just not sure what it looks like... thanks..
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Old 10-01-2009, 10:38 PM
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Yes, it is. If you truck is stock.

Look at the firewall side. You'll see the connector. The EEC is on the other side of the firewall. You'll also see a bracket that holds it in. There is one bolt at the top, remove that bolt and slide it into the inner fender well. our gonna have to be creative, you can remove the computer with-out removing the inner fender well. My brother did and he's not too bright so, I am sure you can do it.
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Old 10-01-2009, 10:55 PM
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Quote:
Originally Posted by ksmith3838 View Post
Nope not there... neighbor said he thought it was behind the ash tray... according to electrical drawing it should have like 48 wires on it... just not sure what it looks like... thanks..

Jeez...no wonder I am confused. You are one of 3 posters in this thread with the same questions, and 3 different trucks. Go post your own thread and quit crapping in this one. When you do this is really screws stuff up.
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Old 10-02-2009, 12:36 AM
1988F-150 1988F-150 is offline
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The fuel pumps on my '88 did the same. Both fuel pump wires had corroded out of the EEC connector or whatever it was. The EEC thing above the wheel well. I'd check every connector you can think of and find in wiring diagrams before you go replacing things. You'll spend more money than need to and be one pissy panda.
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Old 10-02-2009, 12:36 AM
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