Starter relay help
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From: ct
Starter relay help
I have a '90 f250 with 5.8, 4x4 first off. I just put in a new battery today, and while connecting the neg cable to it , it started to spark like crazy. This caused good amounts of smoke to come out my start relay. Needless to say the truck wont start. My questions are....where can I see a diagram of this relay with wires. Im curious to see if my fuel pump goes to this too because my pump use to run all the time when it was in the accesory position. It does not run now. The green wire that goes to my relay feels like it is broken through the wire cover. Maybe my pump wire(if its that) was bad causing it to run all the time and it blew out the relay when I hooked up the battery???? Im confused here and now its snowing and this truck is out of service with my plow on it. I know I need the relay. My lights and other electrical work now, just wont start. Help please. Thanks, Bull.
Last edited by rangershloman; Dec 26, 2004 at 02:50 PM.
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From: Virginia
This is generally what's going on.
It sounds like you need to investigate point #3 in the diagram. The factory uses that point to power the truck's electrical system. You could take all of the smaller wires off point #3, but leave the large one connected. Then connect the battery and see if everything is ok.
If all is ok, you can take a small jumper wire and jump #3 to #5 in the diagram. It should turn the engine over.
If that all works, sounds like your starting system is ok. If you have more than one small wire that was on Point #3, then put them back on one at a time till you find which one has the problem. See if it's rubbing anywhere. The problem should be right around the relay area, since most of these wires have fusible links that would burn out if there was a dead short somewhere else in the truck.
It sounds like you need to investigate point #3 in the diagram. The factory uses that point to power the truck's electrical system. You could take all of the smaller wires off point #3, but leave the large one connected. Then connect the battery and see if everything is ok.
If all is ok, you can take a small jumper wire and jump #3 to #5 in the diagram. It should turn the engine over.
If that all works, sounds like your starting system is ok. If you have more than one small wire that was on Point #3, then put them back on one at a time till you find which one has the problem. See if it's rubbing anywhere. The problem should be right around the relay area, since most of these wires have fusible links that would burn out if there was a dead short somewhere else in the truck.
Moderator
Joined: Jan 2001
Posts: 56,971
Likes: 2,731
From: Virginia
Here's some free diagrams, and I guess they are better than nothing. You can try www.helminc.com where you can order the better factory diagrams too.
http://www.autozone.com/images/cds/g...3d800a3a4d.gif
In the above diagram you can see the fuel pump is fed by fusible link w. Most of the fusible links are fed by the wire going to point #3 in the diagram in the previous post.
Here's the one other diagram that has the lights.
http://www.autozone.com/images/cds/g...3d800a3a5c.gif
http://www.autozone.com/images/cds/g...3d800a3a5d.gif
http://www.autozone.com/images/cds/g...3d800a3a4d.gif
In the above diagram you can see the fuel pump is fed by fusible link w. Most of the fusible links are fed by the wire going to point #3 in the diagram in the previous post.
Here's the one other diagram that has the lights.
http://www.autozone.com/images/cds/g...3d800a3a5c.gif
http://www.autozone.com/images/cds/g...3d800a3a5d.gif
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