I have an 05 TJ that lost all power this afternoon. I've been having trouble with the oil pressure gauge sticking causing the "check gauges" light to come on. Otherwise the jeep has been running nicely. Usually if I turn the jeep off, then back on it resets and works fine. Today when I did that, I lost all power to the jeep. I tried to jump it and nothing happened. I've checked all the fuses and relays still nothing. I read someone on another site say that it could be the ignition switch so I replaced that. Wrong again. I have no power what so ever, no lights, no horn, just a useless hunk of metal at this point. I'm hoping someone has some good suggestions to help me out. What's the next step to figure this out? Thanks in advance!
No power
- Thread starter cope_angel88
- Start date
A battery can be so dead that the engine can't be started even with a jump start. A couple common reasons for that are as follows... 1) The dead battery is sucking in so much current from the jump battery that there's not enough power left to start the engine. That has happened to me. The test for that is to disconnect the dead battery completely and connect the jump start cables directly to the disconnected battery cables and see if it starts then. 2) The jumper cables have such a light gauge (small diameter) that they can't carry enough current to jump start an engine. I have personal experience with both of those issues preventing an engine from being jump started.
The headlights can be turned on without the ignition switch being on. Will the headlights go on at full brightness? If the headlights can't be turned on either I suspect your battery is simply toast-dead. A "load test" is the only way a battery's true health can be determined, any battery shop can conduct a load test for you to give you an accurate indication of your battery's true health. Caution that while many auto parts stores can conduct a battery load test, not many know how to conduct them properly. An improperly conducted load test can indicate a good battery when it is actually nearly dead. And even a nearly dead battery can indicate 12 volts on a volt meter since volt meters don't place a load on what they're measuring.
The headlights can be turned on without the ignition switch being on. Will the headlights go on at full brightness? If the headlights can't be turned on either I suspect your battery is simply toast-dead. A "load test" is the only way a battery's true health can be determined, any battery shop can conduct a load test for you to give you an accurate indication of your battery's true health. Caution that while many auto parts stores can conduct a battery load test, not many know how to conduct them properly. An improperly conducted load test can indicate a good battery when it is actually nearly dead. And even a nearly dead battery can indicate 12 volts on a volt meter since volt meters don't place a load on what they're measuring.
Update! Took the battery to have it tested. Everything checks out fine. Put the battery back in, she starts up fine. Leads me to believe there was a connection loose somewhere. Thank you for leading me back to the battery.
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
I'll bet it was indeed a connection issue. What do your battery terminal connections look like? That's a very common point of failure.
The terminals are fairly new, so they are nice and clean. The ground seemed a bit loose when I disconnected it though.
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
Similar threads
