AzraeL Posted February 26, 2018 Author Share Posted February 26, 2018 Both new assembly and old run out of the truck hot wired/jumped or on the normal plug. Primes when i hit the key and everything. But as soon as any piece of either assembly touch the tank, it will not work. Or the hot wire lead wants to burn up. I'm stumped. Drop the tank and inspect above it? Idk... Link to comment Share on other sites More sharing options...
AzraeL Posted February 26, 2018 Author Share Posted February 26, 2018 It doesn't make any sense to me. Link to comment Share on other sites More sharing options...
Jeep Driver Posted February 26, 2018 Share Posted February 26, 2018 'll have to look at my old photographs but if I'm not mistaken there are two wires that go through the assembly to the outside of the tank that's the hot to the pump in the wire to the sending unit the pump itself is grounded to the assembly Did you check to see if there was continuity between the hot wire and the assembly itself in other words is the hot wire grounding out through the assembly if you say you have them trouble on on both of them I would guess not but I'm wondering if you're using the sender wire as a ground Link to comment Share on other sites More sharing options...
AzraeL Posted February 26, 2018 Author Share Posted February 26, 2018 That would make sense. Except they both work out of the tank sitting on a piece of wood on the ground even by the plug coming from the truck. Itll prime when i hit the key. So its something to do with the tank itself. Both assemblies are fine I'm more than sure. Also there are three wires for the pump plug, a ground, the sender unit (float) and the power to pump. Link to comment Share on other sites More sharing options...
AzraeL Posted February 26, 2018 Author Share Posted February 26, 2018 Is there any idea or reason as to why the tank would short the pump? Link to comment Share on other sites More sharing options...
AzraeL Posted February 26, 2018 Author Share Posted February 26, 2018 Sender wire is purple, ground black, and + wire is grey. Link to comment Share on other sites More sharing options...
Ωhm Posted February 26, 2018 Share Posted February 26, 2018 Did you reuse the fuel pump tank/sending unit gasket? If it is new, then maybe the wrong one, not thick enough. Link to comment Share on other sites More sharing options...
HOrnbrod Posted February 26, 2018 Share Posted February 26, 2018 The 88 Electrical Manual shows the 12V to the pump is ORN, Ground is BLK, and the sender wire is VIO. Test these inputs on the tank 3-pin connector and make sure they match up correctly with the three sender wires. Link to comment Share on other sites More sharing options...
AzraeL Posted February 26, 2018 Author Share Posted February 26, 2018 Okay, also it ran with out the gasket that goes in between the pump and tank but not with it? Link to comment Share on other sites More sharing options...
AzraeL Posted February 26, 2018 Author Share Posted February 26, 2018 And when i put it in the tank with out the gasket it almost started when it primed and ran but seems to not have enough pressure. But i think thats because its letting air in with out the gasket in. So still at a loss. Link to comment Share on other sites More sharing options...
AzraeL Posted February 27, 2018 Author Share Posted February 27, 2018 So i put a ground on the skid plate bolt to frame. Also noticed my old pump assembly missing a rubber boot on the end that insulates it. And that the PO had the pump in wrong! I have never done one on this style tank before and didn't realize until now. So thats why it shorted, it was touching the inside of the tank. I installed the new assembly correctly and plugged her in and I'm good. She's alive again. Link to comment Share on other sites More sharing options...
AzraeL Posted February 27, 2018 Author Share Posted February 27, 2018 Thanks for all the help and ill definitely post again if i need any more! Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now