1989 Ford Aerostar fuel pump-checks

97,000 MILES • 6 CYL • 2WD • AUTOMATIC
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APAYNTER
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  • 1 POST
when i turn the key on the fuel pump kicks on some of the time, now it doesnt kick on at all, I've replaced fuel relay, replaced fuel pump, checked the connector at the inertia swich with a test light, (light turns on for a couple seconds when the ignition is fisrt turned on, and stays lit when cranking) so does that mean the inertia switch is bad? I just cant figure out why the pump doesn't turn on, I re-checked the pump twice and wiring, every thing is connected right in the tank. at a loss, can you help?
Jan 16, 2008 at 2:08 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Check the fuel pump's power supply voltage and its ground.

The computer energizes the fuel pump relay-if you don't hear the pump for 2secs when key is 1st turn to On start checking the relay for power in and out of it to the pump.
Jan 16, 2008 at 8:10 PM
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