Hello all,
I am wrapping up my 6+ month build. I bought a 1999 TJ with a bad tub and frame, but good interior, body parts and drivetrain (only 86k miles). Most of the wiring worked on the old Jeep before I swapped everything to a new frame and tub, so my guess is I did something wrong. But I'm stumped on what I did. I have two primary issues: it only starts if I jump the starter from the battery, and I have a NO BUS issue on the dash.
No start issue: If I turn the key to on, the fuel pump kicks in. If I turn it to run and jump the starter, it fires right up and runs perfect. I even took it for two short drives around my neighborhood. It has new plugs, wires, battery, battery clamps, and a new starter. I ordered a new ignition switch and actuator pin. Ignition switch is delayed at customs so I don't know when it will be here. I bought those on the recommendation of others on here, but I don't think it's going to be the problem. When I turn the key to start the Jeep, it clicks in the fuse panel behind the glove box. So it's clearly sending a signal through there. When I test for power at the starter wire, I get nothing. So I'm guessing the connection is bad/broken somewhere between the ignition and starter. I'm just not great at reading wiring diagrams to track this down, so I'm hoping someone can help me and put it in simple terms. I've checked all the fuses that could be the cause and they all work. I don't want to buy a relay yet unless there's a good chance that is it. I tried watching videos on jumping the relay with a wire to see if it's bad, but it didn't make complete sense to me as to what I was supposed to do. Where do I go from here?
NO BUS issue: I have disconnected, inspected, cleaned, and reconnected every wire harness I can find, including the two that plug into the gauge cluster. I can't find what's wrong. All the lights on the outside of the Jeep are new and all work. Radio works. HVAC works. Fuel pump works. Everything electronic is working, so I don't know what is left that isn't connected. I replaced the coolant temp sensor because it was snapped and had a broken wire. I disconnected and inspected the other 5v connectors (throttle position sensor, crank position sensor, cam position sensor, and so on), and I saw no issues with them. There was no NO BUS issue on the Jeep when I bought it, so I definitely think it's something I did wrong or forgot to do. All grounds are hooked up inside including the two to the speaker mounts, back of the radio, and to the kick panels on each side. The main battery wire harness under the hood is grounded to the firewall, engine is grounded to the frame, and the ribbon from the block is attached to the hood. What else is left to check?
Are these two issues related? I am at the very end of this build and these are going to keep me from being able to drive it everywhere. I need to repair, paint and remount the roll bar and fix these wiring issues, and it'll be driving. I'm getting very frustrated trying to track these two issues down.
I am wrapping up my 6+ month build. I bought a 1999 TJ with a bad tub and frame, but good interior, body parts and drivetrain (only 86k miles). Most of the wiring worked on the old Jeep before I swapped everything to a new frame and tub, so my guess is I did something wrong. But I'm stumped on what I did. I have two primary issues: it only starts if I jump the starter from the battery, and I have a NO BUS issue on the dash.
No start issue: If I turn the key to on, the fuel pump kicks in. If I turn it to run and jump the starter, it fires right up and runs perfect. I even took it for two short drives around my neighborhood. It has new plugs, wires, battery, battery clamps, and a new starter. I ordered a new ignition switch and actuator pin. Ignition switch is delayed at customs so I don't know when it will be here. I bought those on the recommendation of others on here, but I don't think it's going to be the problem. When I turn the key to start the Jeep, it clicks in the fuse panel behind the glove box. So it's clearly sending a signal through there. When I test for power at the starter wire, I get nothing. So I'm guessing the connection is bad/broken somewhere between the ignition and starter. I'm just not great at reading wiring diagrams to track this down, so I'm hoping someone can help me and put it in simple terms. I've checked all the fuses that could be the cause and they all work. I don't want to buy a relay yet unless there's a good chance that is it. I tried watching videos on jumping the relay with a wire to see if it's bad, but it didn't make complete sense to me as to what I was supposed to do. Where do I go from here?
NO BUS issue: I have disconnected, inspected, cleaned, and reconnected every wire harness I can find, including the two that plug into the gauge cluster. I can't find what's wrong. All the lights on the outside of the Jeep are new and all work. Radio works. HVAC works. Fuel pump works. Everything electronic is working, so I don't know what is left that isn't connected. I replaced the coolant temp sensor because it was snapped and had a broken wire. I disconnected and inspected the other 5v connectors (throttle position sensor, crank position sensor, cam position sensor, and so on), and I saw no issues with them. There was no NO BUS issue on the Jeep when I bought it, so I definitely think it's something I did wrong or forgot to do. All grounds are hooked up inside including the two to the speaker mounts, back of the radio, and to the kick panels on each side. The main battery wire harness under the hood is grounded to the firewall, engine is grounded to the frame, and the ribbon from the block is attached to the hood. What else is left to check?
Are these two issues related? I am at the very end of this build and these are going to keep me from being able to drive it everywhere. I need to repair, paint and remount the roll bar and fix these wiring issues, and it'll be driving. I'm getting very frustrated trying to track these two issues down.