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Old 03-04-2006, 17:34   #1 (permalink)
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96 ranger v-6 (3.0) - fuel pump not working

Hi - The truck was running and starting fine. Went to start it up to go home, and it just turned over, won't start.

I believe that I have it mostly figured out. I don't hear the fuel pump when I turn on the ignition.

- checked the inertia switch as best that I could: the button was pushed in, but I toggled it back and forth and
checked for continuity - 3 connections, marked as NO-C-NC, which I assume is "normally open-C-normally closed".

With the button in, the circuit is continuous between C and "normally closed", and with the button out, the circuit is continuous between "normally open" and C. I checked the voltage across the wires that go to C and NC, and I see
12V. I think all is well there..., but I don't quite understand why 3 wires...

- On to the fuel pump: not very accesible, ouch; I want to see if there is voltage at the electric fuel pump mounted on the top of the plastic tank. The problem that I have, is that I don't understand how to get the wires off of the pump! There are little pieces of soft rubber near the connector for each wire. Can I take these wires off somehow to check for voltage? I'll have to look at a wiring diagram, because I would have expected 2 wires, 12V and ground, but there are more.

If it turns out that there is voltage at the pump and it still doesn't pump (can't hear a thing) then is there anything else to look at, assuming that the connections are good?

btw, I checked the fuse, and it is good.

Thanks!
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Old 03-05-2006, 02:59   #2 (permalink)
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Re: 96 ranger v-6 (3.0) - fuel pump not working

theres normaly 3/4 wires that go to the pump 1 is the live 2 ground 3/4 fuel gauge. the pumps starts as soon as you turn on but only goes for a few secs but runs again when turning over. you need to check if you have power from the realy to the pump. hope that helps
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Old 03-05-2006, 10:03   #3 (permalink)
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Re: 96 ranger v-6 (3.0) - fuel pump not working

thx welshandproud - I looked at a wiring diagram, and it confirms what you said. The problem I'm having is trying to get the wires off to test them at the pump location. There's power everywhere else.

I want to make sure that the ground and 12V right at the pump are good.

Rob
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