fuel pump relay
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New User
Joined: Jun 2002
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fuel pump relay
Have a 1989 F-150, 302-EFI-, Truck ran fine, switched from rear tank to front tank and truck quit ,switched back tanks and still wont run, both tanks are full of fuel and I have no noise from either fuel pump at all, checked for power at the fuel pump relay, Had power in and out with key on,Checked the reset on the inertia switch and it was never tripped, checked the wires to the inertia switch and found these wires to be dead, My question is this, should there be power to the two wires coming to and leaving the switch. I checked for power with a test light and had nothing, I can run a jumper wire from the Brown/White wire under the truck and get the pump to work but have lost power or ground to the circuit, had friend put it on his computer and it said code #97 which is open fuel pump circuitry, but am having trouble locating the problem area, any ideas, Thank You
Elder User
Joined: Jan 2002
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fuel pump relay
I had trouble in the shop with one of these a few years ago and if my memory serves me I believe it was the fusible link near the starter relay. Check there first and if not you can give the relay a try because corrorsion is there worst problem. I dont have a wiring diagram handy go give you much more help.
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fuel pump relay
I though they were "GROUND ACTUATED" circuits.
Aways power to them > the ground in the computer closes the circuit.
[font color=red]Dennis
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Aways power to them > the ground in the computer closes the circuit.
[font color=red]Dennis
Calgary,Alberta,Canada[/font]
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fuel pump relay
I have a 1992 Ford F-150 XLT 302 EFI, and whenever I switch over to my rear tank, the truck dies and stalls, and the gas gauge reads 0, my guess is that the pump is shot if so, how much for the pump, and how much for the labor of putting the pump inside the rear gas tank.
New User
Joined: Jan 2008
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fuel pump relay
There are two pumps are there not?
Three when there are Dual tanks.
That sounds like a tank divertor/switch problem.
[font color=red]Dennis
Calgary,Alberta,Canada[/font]
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Please Don't Ask Me Any Tough Questions,
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Three when there are Dual tanks.
That sounds like a tank divertor/switch problem.
[font color=red]Dennis
Calgary,Alberta,Canada[/font]
[link:www.ford-trucks.com/guidelines.html|FTEModerator]
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http://www.clubfte.com/users/mil1ion/Mil1ion.html
[font color=red]
Please Don't Ask Me Any Tough Questions,
"I'm Saving My Memory For When I Develop Alzheimer's" [/font]
[font color=blue]78 F-150 429CJ,Silver,Explorer Pkg.
[/font]
New User
Joined: Dec 2001
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fuel pump relay
Your post is old, so hopefully your up and running.
My '89 Bronco recently wasn't getting gas. I did the test at the Data Link Connector and the pumps didn't run. As far as I could tell the fuseible link was OK. I changed the fuel pump relay and it didn't help. I changed the EEC relay and it fired up like a dream. I don't know how to test directly for the relay but maybe that is your problem.
Norten
My '89 Bronco recently wasn't getting gas. I did the test at the Data Link Connector and the pumps didn't run. As far as I could tell the fuseible link was OK. I changed the fuel pump relay and it didn't help. I changed the EEC relay and it fired up like a dream. I don't know how to test directly for the relay but maybe that is your problem.
Norten
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Freshman User
Joined: Apr 2002
Posts: 48
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From: San Antonio USA
fuel pump relay
I have an 89 460 and recently went through all of the EEC IV EFI electrics to stuff it into my '70 Highboy. I have all if the electrical diagrams and EFI manuals. If you are still having problems let me know.
There is a test connector under the hood that will fire up the fuel pump relay without cranking the engine.
If you have two tanks then there is a mechanical gas reservoir on the driver's inside framerail that acts both as a reservoir and a mechanical fuel line switch (on the 460). It switches both the gas from the tank and the gas returning. It is switched by the intank fuel pump running.
Too much other info to type. Let me know if you need the docs.
Russ
There is a test connector under the hood that will fire up the fuel pump relay without cranking the engine.
If you have two tanks then there is a mechanical gas reservoir on the driver's inside framerail that acts both as a reservoir and a mechanical fuel line switch (on the 460). It switches both the gas from the tank and the gas returning. It is switched by the intank fuel pump running.
Too much other info to type. Let me know if you need the docs.
Russ
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Joined: Nov 2002
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From: Concord, NC
fuel pump relay
[updated:LAST EDITED ON 10-Dec-02 AT 12:24 PM (EST)]This is getting confusing. I'm not sure which responses are to which questions. The 89 I think still has low pressure in-tank pumps, and a high pressure in-line pump on the frame. I believe the '92's had only the in-tank pumps and no frame rail reservoir/valve. Ford switched to high pressure in-tank pumps with a check valve built into them to keep the pumps from pumping gas from one tank to the other, without a selector valve, and without a high pressure frame rail pump. And the problem sounds like it is electrical to me. Hope this helps.
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