fuel pump relay BLUE WIRE (HELP)
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fuel pump relay BLUE WIRE (HELP)
my question is does the power go into relay from the yellow wire's and come out into the the blue wire the runs the pump. i still dont have power to fuel pump's in i put power to the blue wire coming out of the relay thepumps fire up. or does the pwer to the blue wire come from another sourec. please help running out of patience's. LOL.
Fleet Owner
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From: Easton,Ks
Originally Posted by fordmancounty
my question is does the power go into relay from the yellow wire's and come out into the the blue wire the runs the pump. i still dont have power to fuel pump's in i put power to the blue wire coming out of the relay thepumps fire up. or does the pwer to the blue wire come from another sourec. please help running out of patience's. LOL.
Lead Driver
Joined: Aug 2006
Posts: 5,670
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From: Sand Lake, MI
Had what sounds like the same problem with a bronco, would run with a jumper wire in place of the pump relay (but pumped fuel the whole time the key was on) but wouldn't run with the relay in place.
Tracked it down and found it had only one wire to the relay that never had juice to it, read in the manual that wire came from the computer, put a different computer in and it cycled the pumps on and off as it should and ran right with the relay in place.
Not sure if thats your problem but it kinda sounds like it, I will say it is the first time I ever had to replace a computer in all my years running fords, (lots of years). Don't go spend top dollar on one until you know for sure.
When you turn the key to the "on" position without starting it that wire from the computer should be live for a few seconds and run the pumps. Find out if that blue wire does come from the computer on yours.
I traced it back from the relay to the computer to be sure it was in fact the same wire.
The manual I have states the colors in it's diagrams may not be representative of the actual wire colors used on the trucks, handy huh? lol
Tracked it down and found it had only one wire to the relay that never had juice to it, read in the manual that wire came from the computer, put a different computer in and it cycled the pumps on and off as it should and ran right with the relay in place.
Not sure if thats your problem but it kinda sounds like it, I will say it is the first time I ever had to replace a computer in all my years running fords, (lots of years). Don't go spend top dollar on one until you know for sure.
When you turn the key to the "on" position without starting it that wire from the computer should be live for a few seconds and run the pumps. Find out if that blue wire does come from the computer on yours.
I traced it back from the relay to the computer to be sure it was in fact the same wire.
The manual I have states the colors in it's diagrams may not be representative of the actual wire colors used on the trucks, handy huh? lol
Lead Driver
Joined: Aug 2006
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From: Sand Lake, MI
Originally Posted by fordmancounty
i still have no spark i have replaced the pick-up and module on the out side and ditributor cap and rotor. any idea's. coil is giving power to cap but nothing coming out.
This is a new problem or another symptom of/with the first, did you fix the fuel pump issue?
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From: Easton,Ks
Sounds like he is talking about the EEC Power Relay and not the Fuel Pump relay. I think he is calling the Blue Fuse Link a blue wire.
Starting to sound like a bad Ignition Switch.
Starting to sound like a bad Ignition Switch.
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Fleet Owner
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From: Easton,Ks
Originally Posted by 88F-150pimp
On my truck, power comes from the yellow wire into the relay, and then goes to the inertia and fuel pump switch via a brown wire.
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i think i figure it out.if i put a jumper to the yellow and blue fuse link / red wire and a jumper from the yellow and brown wire i have spark and fuel pumps so i'm thinking that my inertia switch is bad. i keep working on it till i get it running. what do you guys think. fixed or not.
Fleet Owner
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From: Easton,Ks
Originally Posted by fordmancounty
i think i figure it out.if i put a jumper to the yellow and blue fuse link / red wire and a jumper from the yellow and brown wire i have spark and fuel pumps so i'm thinking that my inertia switch is bad. i keep working on it till i get it running. what do you guys think. fixed or not.
The power relay should close when you turn on the key.
Make sure the small black wire with a green stripe has a good ground at the NEG post of the battery, this may be your problem.
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