!996 JGC died while running yesterday all wiring has been checked for ground an continuity. Terminals are good fuseable links good. When you now try to start the jeep it has power everywhere but when you engage the key it clicks at the pdc somewhere in the relays? all the fusses are great it never loses power just clicks no sylinoid noise no nothing just clicks @ relays but I dont understand if it is starter or starter relay why the vehicle died while running and now will not start?
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Check to make sure the power lead from the alternator to the battery has a good connection. Sometimes the connectors get corroded, or the wire separates inside the insulation. You can check the wire for continuity with an Ohm meter...make sure to disconnect the wire at both ends when you use the Ohm meter.
Make sure the battery has a good clean ground. Make sure the alternator is grounded to the engine and the engine ground strap is intact and has clean grounds on both the engine and frame. Test the alternator with the engine running using a voltmeter across the battery. You should read 13.5 to 14.7 volts. If the alternator is not charging the battery will go dead under normal operation. If you don't get the correct charging voltage either your connections are bad or the alternator is bad.
Check for.dirty ir.loose.connection.at the terminal to wire connection also all ground wires leading from battery fusable links are inline.with wires they look like little.rectangular or.round erasers on the wires check. Owners manual or download a free repair manual online fir.ground locations and fuseable link locations. Also check all fuses and relays associated with starter and main relay a bad engine to frame/body ground wire or connection will cause car to not.start.
I'm not positive the wiring is the same for trucks and vans, but you should have a yellow wire for both relays that go to a fuseable link off the starter solenoid. The key switch powers the EEC relay on, and the computer grounds the fuel pump relay on. You may want to check the fuseable links and power coming from the key switch.
You didn't post an engine size but you are correct in thinking there is a fusible link that blew when you grounded the orange wire but there is also an inline fuse that protects the oil pressure switch and the fuel pump relay. It is usually located on the firewall.
You can check the fusible links near the starter for continuity. If one of them is burnt up start there by replacing it. If none of them are bad you will need to find the inline fuse. At least the 3.3 liter engine is set up this way.
Pour some gas down the intake manifold and see if it starts to verify this problem. If it starts you may have a bad fuel pump or possibly a bad ground for the body check all your body grounds. But if you're able to ground out the fuel pump and you hear it run you may have a clogged fuel filter. If you can keep the fuel pump running see if it will start if it starts you may have a wiring problem. Remember that computer controls both the positive in the ground going to the fuel pump. Good luck.
if it starts runs and dies instantly, the fuel pump could be the culprit, its getting the signal to sqirt fuel to start but then no voltage to continue pressure.. check fuel pump and also worse case senerio is the ECU (main computer could be bad)