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Ford f-150 low voltage from fuel relay
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IvelB
Novice
Jul 24, 2012, 1:13 PM
Post #1 of 9
(5017 views)
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Ford f-150 low voltage from fuel relay
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I have a 1994 ford f-150 truck, 300 6cyl. 4.9L elec.fuel injection, twin tanks , yesterday while driving it just shut off, i thoght it might be one of the two fuel pumps, so I hot wired the pumps and they work fine, so then I thought it might be the fuel relay, bought a new one and installed it, truck still won't start. The system is only getting 6 volts from the relay to the pumps, should be 12 volts, Do you know what the problem is?
(This post was edited by IvelB on Jul 24, 2012, 1:19 PM)
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 24, 2012, 1:23 PM
Post #2 of 9
(5010 views)
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Re: Ford f-150 low voltage from fuel relay
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Check the Inertia switch under the dash on the passenger side.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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IvelB
Novice
Jul 24, 2012, 1:50 PM
Post #3 of 9
(4991 views)
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Re: Ford f-150 low voltage from fuel relay
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The Inertia switch is fine, Power is going to the pumps from the relay, but it's only 6 volts instead of the 12 volts needed.
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 24, 2012, 2:01 PM
Post #4 of 9
(4984 views)
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Re: Ford f-150 low voltage from fuel relay
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Well it's 12 when it comes into the relay, or should be. You need to do some testing to include a voltage drop test. Make sure you are testing that with the pump unplugged because the pump could be pulling it down.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
(This post was edited by Hammer Time on Jul 24, 2012, 2:01 PM)
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IvelB
Novice
Jul 24, 2012, 2:13 PM
Post #5 of 9
(4972 views)
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Re: Ford f-150 low voltage from fuel relay
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Voltage drop test where? Only getting 6 volts to inerta switch.
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 24, 2012, 2:49 PM
Post #6 of 9
(4955 views)
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Re: Ford f-150 low voltage from fuel relay
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It's pretty obvious that you are over your head with electrical diagnostics. I suggest you bring it to diagnostic tech.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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IvelB
Novice
Jul 24, 2012, 2:57 PM
Post #7 of 9
(4950 views)
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Re: Ford f-150 low voltage from fuel relay
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no, you just don't know the answer so you say I'm over my head
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 24, 2012, 2:59 PM
Post #8 of 9
(4945 views)
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Re: Ford f-150 low voltage from fuel relay
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Hahaha,................ Yeah, that's what it must be.
Don't expect much help that way.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 24, 2012, 3:35 PM
Post #9 of 9
(4933 views)
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Re: Ford f-150 low voltage from fuel relay
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I have deleted your other abusive post and removed your access to the forum.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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