Eric sicca Posted June 27, 2019 Share Posted June 27, 2019 Can anyone help with this wiring issue. Got the pump working but guage isn't hooked up. Blue goes to the guage but I got 3 extra wires coming from the plug Link to comment Share on other sites More sharing options...
Jeep Driver Posted June 28, 2019 Share Posted June 28, 2019 Something there isn't right. Are you sure that is the harness for the pump? Link to comment Share on other sites More sharing options...
Ωhm Posted June 28, 2019 Share Posted June 28, 2019 What year??? Link to comment Share on other sites More sharing options...
Eric sicca Posted June 28, 2019 Author Share Posted June 28, 2019 5 hours ago, Ωhm said: What year??? It's an 88 Link to comment Share on other sites More sharing options...
Eric sicca Posted June 28, 2019 Author Share Posted June 28, 2019 5 hours ago, Jeep Driver said: Something there isn't right. Are you sure that is the harness for the pump? I just got this jeep from down south. Its pumping fine. I think it's a cheap aftermarket unit from rock auto or something Link to comment Share on other sites More sharing options...
Jeep Driver Posted June 28, 2019 Share Posted June 28, 2019 44 minutes ago, Eric sicca said: I just got this jeep from down south. Its pumping fine. I think it's a cheap aftermarket unit from rock auto or something OK.............well..................... Fuel pump plugs into C139 which has three wires, red, black, tan. Red is power, black is ground, tan is gauge. I have no idea what you have it tapped into but it ain't C139. Someone here will post for you a link to the '88 electrical manual............you need to trace this down. And that type of splice is not acceptable for longevity. Link to comment Share on other sites More sharing options...
Eric sicca Posted June 28, 2019 Author Share Posted June 28, 2019 The previous owner did a 4.0 Ho swap so I'm assuming these wires are from a newer xj Link to comment Share on other sites More sharing options...
Jeep Driver Posted June 28, 2019 Share Posted June 28, 2019 46 minutes ago, Eric sicca said: I just got this jeep from down south. Its pumping fine. I think it's a cheap aftermarket unit from rock auto or something Well, now that you mention it.......... From the south or not, from rockauto or not........that is not an MJ pump/sender anyway. Anyway, Welcome! Link to comment Share on other sites More sharing options...
Eric sicca Posted June 28, 2019 Author Share Posted June 28, 2019 12 minutes ago, Jeep Driver said: Well, now that you mention it.......... From the south or not, from rockauto or not........that is not an MJ pump/sender anyway. Anyway, Welcome! Well it fits and runs just fine so I'm assuming it is a aftermarket pump. My mechanic friend said to just touch the wires together until the right one makes the needle jump.. I was leery of this but he saying it's fine since anything is is o ly 12 volts and won t cuase an issue Link to comment Share on other sites More sharing options...
Jeep Driver Posted June 28, 2019 Share Posted June 28, 2019 5 hours ago, Eric sicca said: Well it fits and runs just fine Link to comment Share on other sites More sharing options...
cruiser54 Posted June 28, 2019 Share Posted June 28, 2019 Sounds like ya got it figgered out. Got a fire extinguisher standing by? Link to comment Share on other sites More sharing options...
Eric sicca Posted June 28, 2019 Author Share Posted June 28, 2019 2 minutes ago, cruiser54 said: Sounds like ya got it figgered out. Got a fire extinguisher standing by? Funny Link to comment Share on other sites More sharing options...
Jeep Driver Posted June 28, 2019 Share Posted June 28, 2019 14 minutes ago, Eric sicca said: Funny If you want help from us you will have to be more forthcoming......that's how it works, we are not here to pull teeth. You could have told us from the beginning that it was a late model swap, that said, I still don't believe that is the harness even for a later pump. Too many wires. You may have 12v from somewhere and the pump may run.........but............it still does not look right. Link to comment Share on other sites More sharing options...
Ωhm Posted June 28, 2019 Share Posted June 28, 2019 Fuel pump running 'fine' and 'as intended' can be two different things. Does fuel pump cycle ON, then OFF when KEY is turned to the ON position? Link to comment Share on other sites More sharing options...
Eric sicca Posted June 28, 2019 Author Share Posted June 28, 2019 21 minutes ago, Ωhm said: Fuel pump running 'fine' and 'as intended' can be two different things. Does fuel pump cycle ON, then OFF when KEY is turned to the ON position? Absolutely Link to comment Share on other sites More sharing options...
Eric sicca Posted June 28, 2019 Author Share Posted June 28, 2019 29 minutes ago, Jeep Driver said: If you want help from us you will have to be more forthcoming......that's how it works, we are not here to pull teeth. You could have told us from the beginning that it was a late model swap, that said, I still don't believe that is the harness even for a later pump. Too many wires. You may have 12v from somewhere and the pump may run.........but............it still does not look right. Link to comment Share on other sites More sharing options...
Eric sicca Posted June 28, 2019 Author Share Posted June 28, 2019 6 minutes ago, Eric sicca said: Absolutely Everything works but the guage. Toggles on and off with key Link to comment Share on other sites More sharing options...
Ωhm Posted June 28, 2019 Share Posted June 28, 2019 From that connector in your photo, backtrack the harness to wherever it goes and see where it splice into the MJ harness. Could be a second plate of spaghetti wires waiting for you. Maybe fuel gauge wire live there or can tell you which wire goes to the gauge. Link to comment Share on other sites More sharing options...
Eric sicca Posted June 28, 2019 Author Share Posted June 28, 2019 Appreciated. I know some of the years had a violet wire which was the guage. Maybe that faded pinkish was violet at one time Link to comment Share on other sites More sharing options...
Ωhm Posted June 28, 2019 Share Posted June 28, 2019 37 minutes ago, Eric sicca said: Maybe that faded pinkish was violet at one time That harness you have is not factory. It's a 'someone added me on harness'. Harness needs backtracking or if you're feeling lucky, just connect it to your loose wires one at a time. Link to comment Share on other sites More sharing options...
Eric sicca Posted June 28, 2019 Author Share Posted June 28, 2019 2 minutes ago, Ωhm said: That harness you have is not factory. It's a 'someone added me on harness'. Harness needs backtracking or if you're feeling lucky, just connect it to your loose wires one at a time. NOt feeling lucky.... that's why I asked for help Link to comment Share on other sites More sharing options...
shelbyluvv Posted June 28, 2019 Share Posted June 28, 2019 Did the PO switch the cluster to a 91+? That is a XJ HO pump and sender. Link to comment Share on other sites More sharing options...
Ωhm Posted June 28, 2019 Share Posted June 28, 2019 Link to comment Share on other sites More sharing options...
Eric sicca Posted June 28, 2019 Author Share Posted June 28, 2019 Just now, Eric sicca said: NOt feeling lucky.... that's why I asked for help It's a Frankenstein but a rust free one. Link to comment Share on other sites More sharing options...
Eric sicca Posted June 28, 2019 Author Share Posted June 28, 2019 1 minute ago, shelbyluvv said: Did the PO switch the cluster to a 91+? That is a XJ HO pump and sender. Yes but not sure of the exact year 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