I was installing a new stereo in my Jeep yesterday. Got everything installed and worked perfectly. I drove it around for about ten minutes and went inside. Came back out and drove it an hour later and all of a sudden all my lights on the dash went off. Stopped to check it out, and now it won't start. No power to the fuel pump. I can't hear it at all when the key is in the on position. Switched around the relays and still nothing. Checked the ground wire and it's tight. Any help would be much appreciated. This is my DD and I'm stranded at my sister's house!
No codes, no lights, turns over but won't start. I thought I may have accidentally cut the ground wire when I was removing the old speaker wire, but from searching this site found that the ground wire in the 93 is on the firewall behind the battery. I'm stumped! it ran great and then all of a sudden, nothing.
Well if you have a late I6 like my 94 here you can go to your relay box and run power directly to the terminal marked with a green arrow, It leads to the fuel pump so if your fuel pump still works, you can get running and get yourself home to fix it right.
No power to the fuel pump means an electrical problem. Disconnect the ground wire terminal on the fuel pump and clean the area down to bare metal again, confirming good chassis ground, reinstall. Start from the battery and work your way back towards the pump, following the pumps Hot + wire. Make sure you have a good charge on the battery too, and also confirm that your Alternator is able to keep up with the electrical demand.
I had that happen to me years ago when I first bought my Jeep, I put in a new radio, drove around for a day or two, and BAM! Dash lights went out, lost all indications and electrical power, fuel pump failed and my Jeep stalled-out. My problem was the Alternator. I guess my old Alternator couldn't handle anymore juice taken from it, and the battery slowly drained away since it wasn't being charged.
That is strange. Sounds almost like you have a bad major ground (or supply). Check the power distro box by the battery. Is the cable and connector there on tight? not corroded? in good shape? What about the power wire to the starter? and ground? Ground to the firewall? Wiggle the connections and make sure they are solid and well connected.
I ended up replacing all of these cables at once time and, when I did, found that two of those connections were rusted under the otherwise solid looking connection.
Denis A. Baldwin
1991 YJ 99 Vortec 5.7L, SM465, NP205, 14 Bolt Rear, Dana 60 Front, 5.13 Gears, Detroit Lockers, 395/85R20 46" Michelin XML tires on 20" XD Wheels, Cherokee Offset Springs (10" front to back stretch total), Bilstein 5150s, 1in. BL, custom cage, Warn M8000, Double D Dash/OHC, 4Low Front Stinger Bumper, DirtWorx Rear Bumper WTC, Tube Fenders, Comp Cut, 1 Ton HD Kingpin High Steering and PAID FOR.
I switched the relay with the horn and nothing, no fuel OR horn so I thought maybe both were bad. Got two more and replaced fuel pump and asd relay still nothing. All wire connections are good, grounds are good. What on earth...
I can't hear my fuel pump running unless my tank is low so I would say no
also if your battery is topped you should be able to start either way you can check the battery with a multi-meter or you can try getting started with a jump.
Did you try running power directly to your pump to see if you got fuel pressure?
If you try and there is no pressure it could be a clogged fuel filter, bad regulator or dead pump.