Fuel pump relay
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Postmaster
Joined: Oct 2003
Posts: 4,516
Likes: 1
From: SoCal
Yep, i've got one. Ignition switch to EEC relay is red/light green. Starter relay -red fuse link- to EEC relay is yellow.
For the pump relay: Starter relay -blue fuse link-to pump relay is also yellow.
EEC relay to fuel pump relay is red,
And yes the relays should click when you turn the key on.
For the pump relay: Starter relay -blue fuse link-to pump relay is also yellow.
EEC relay to fuel pump relay is red,
And yes the relays should click when you turn the key on.
Last edited by 87 XLT; Sep 27, 2005 at 12:57 AM.
Moderator
Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
The power to energize the relays, comes from the ignition switch.
So if they are not working, 87XLT will have to give you the color codes for those wires, so you can check for voltage coming from the ignition switch, to the relays operating coils.
So if they are not working, 87XLT will have to give you the color codes for those wires, so you can check for voltage coming from the ignition switch, to the relays operating coils.
Cargo Master
Joined: May 2001
Posts: 3,208
Likes: 13
Ground the fuel pump test pin on the eec test plug and turn on the ignition switch the pump should run. If it does then check to make sure you have voltage at the PCM. The pcm does nothing but turns on ground for the FPR circuit I think it is a yellow with green stripe wire I don't have my books here to give you the pin outs on the pcm. If there is no voltage there then it is a wiring issue if there is voltage it is a pcm issue. I have a mustang I have wired that circuit up to a switch because the PCM FPR circuit is bad.
Freshman User
Joined: Jul 2005
Posts: 31
Likes: 0
From: Everett Pa
ok well a couple days ago i was checking some things out and trying to clean up all the ground wires i could find. but heres the problem now well acouple days ago i left my switch on for like 10 minutes or so and i was looking around and found out that my alternator was hott. is it supposed to get hot like that with just the switch left on? well today i went out and tried to check that out like wtroger said but now i am not getting any power in the cab at all. the battery is good i put it on the charger and its fully charged, i also checked to see if anything was going in with the charger on and still nothing. so then i checked and im getting power too the relays and the one does click when i put the battery terminal on. so ummm...... now what? lol
P.S. does anyone have a distributor drive gear? (the gear on the end of the shaft?)
P.S. does anyone have a distributor drive gear? (the gear on the end of the shaft?)
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Joined: Jul 2005
Posts: 31
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From: Everett Pa
hello when i put the battery terminals on the battery light inside in the dash comes on but is real dim and when i turn the switch over it goes out. but the battery isnt dead cause i have noticed if i let the terminals on the battery has been going dead so i charged it up and checked it with my meter and its fine. but anyhow the lights dont come on neither does the dome light or anything.
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