RubiSc0tt
Well-Known Member
- First Name
- Scott
- Joined
- Jun 12, 2018
- Threads
- 64
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- 1,737
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- 2,362
- Location
- Upstate NY
- Vehicle(s)
- 2019 JLUR in Punk'n Orange
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- Turn Wrenches/ Write code
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- #1
2019 JLUR, 59k mi. 3.6L, Manual transmission (further stats in signature)
Trying to troubleshoot through this:
Two weekends ago I was getting low voltage warning, telling me Aux Switches were not available. Jeep would not start- The cluster would light up, but when I press the clutch and the start button, it blips and would not start. So I disconnected the ESS Battey as shown in this video ; Negative terminal on the main battery disconnected, to the ESS battery, pulled fuse 42 and made sure system was off via Tazer. Fired right up, no check engine or warning lights, and drove away. No issues all week.
Last weekend, the Jeep was totally dead when I went to start it. Push in the clutch to roll forward and pop start and it worked fine. Went inside for about an hour or so, come out and as I start it it does the same thing: cuts out, dies, then comes back. Go to get gas 5 mins away, same thing. Voltmeter on the dash is reading 12-13v.
Had the main battery and alternator checked at NAPA, both reading good.
Coming home from a quick grocery trip store and the Jeep freaked out. All sorts of warning lights, the “stop safely vehicle will shut off soon” message, etc. as soon as I was half way up my driveway, it died. Checked the codes, BCM code U1514-87 which has been a constant for a bit now, but also 3 ABS codes: C212A-16, C2101-17, P212-A17. Nothing has changed, the Jeep was in the driveway all day while we worked on house stuff. My son did mention there is a crack in the passenger side tail light and I’ve read if water gets in there it can cause some issues. Used some canned air to try to blow the water out, and taped over the crack to try to keep water out.
No driving Monday. Tuesday, the Jeep freaked out multiple times on the way to work. (32 mi one way). Power fading out and then almost shutting down, no warnings beforehand, infotainment freezing, wipers coming on, typical freak out. This was on the highway as well. No discernable pattern- smooth cruising, stop and go traffic, brakes, no brakes, shifting, no shifting, body roll, no body roll. Nothing easily disceernable to motion of the Jeep or the road. Same error codes and warning lights as above: voltage, ABS, and when I got home "Stop safely vehicle will shut down soon." Parked the Jeep until I could examine it more.
Wednesday, I pulled the tail light, turned it upside down and emptied the water out, and then used more canned air to blow out whatever water i could. put it in the sun to dry out (hopefully). Went for a spin around the neighborhood without a tail light just to see what would happen- no issues, and no warnings- with no tail light connected. This was very curious as I thought there would at least be a "tail light out" warning.
After work, I pulled the ESS battery completely out and taped off the connections to eliminate the possibility of any sort of weird parasitic draw or shorting out on that end. Interestingly, When I put my wrench on the positive terminal it sparked once even with the negative terminal disconnected and separated- so I’m wondering if something was causing it to short out.
I'm going to leave the ESS battery out for now, and try to seal up the crack in the tail light, reinstall it and see how it goes.
Has anyone else dealt with this? Is there anything I'm missing? I've read several threads on here but they were older so I'm wondering if anyone has learned anything new since those.
Trying to troubleshoot through this:
Two weekends ago I was getting low voltage warning, telling me Aux Switches were not available. Jeep would not start- The cluster would light up, but when I press the clutch and the start button, it blips and would not start. So I disconnected the ESS Battey as shown in this video ; Negative terminal on the main battery disconnected, to the ESS battery, pulled fuse 42 and made sure system was off via Tazer. Fired right up, no check engine or warning lights, and drove away. No issues all week.
Last weekend, the Jeep was totally dead when I went to start it. Push in the clutch to roll forward and pop start and it worked fine. Went inside for about an hour or so, come out and as I start it it does the same thing: cuts out, dies, then comes back. Go to get gas 5 mins away, same thing. Voltmeter on the dash is reading 12-13v.
Had the main battery and alternator checked at NAPA, both reading good.
Coming home from a quick grocery trip store and the Jeep freaked out. All sorts of warning lights, the “stop safely vehicle will shut off soon” message, etc. as soon as I was half way up my driveway, it died. Checked the codes, BCM code U1514-87 which has been a constant for a bit now, but also 3 ABS codes: C212A-16, C2101-17, P212-A17. Nothing has changed, the Jeep was in the driveway all day while we worked on house stuff. My son did mention there is a crack in the passenger side tail light and I’ve read if water gets in there it can cause some issues. Used some canned air to try to blow the water out, and taped over the crack to try to keep water out.
No driving Monday. Tuesday, the Jeep freaked out multiple times on the way to work. (32 mi one way). Power fading out and then almost shutting down, no warnings beforehand, infotainment freezing, wipers coming on, typical freak out. This was on the highway as well. No discernable pattern- smooth cruising, stop and go traffic, brakes, no brakes, shifting, no shifting, body roll, no body roll. Nothing easily disceernable to motion of the Jeep or the road. Same error codes and warning lights as above: voltage, ABS, and when I got home "Stop safely vehicle will shut down soon." Parked the Jeep until I could examine it more.
Wednesday, I pulled the tail light, turned it upside down and emptied the water out, and then used more canned air to blow out whatever water i could. put it in the sun to dry out (hopefully). Went for a spin around the neighborhood without a tail light just to see what would happen- no issues, and no warnings- with no tail light connected. This was very curious as I thought there would at least be a "tail light out" warning.
After work, I pulled the ESS battery completely out and taped off the connections to eliminate the possibility of any sort of weird parasitic draw or shorting out on that end. Interestingly, When I put my wrench on the positive terminal it sparked once even with the negative terminal disconnected and separated- so I’m wondering if something was causing it to short out.
I'm going to leave the ESS battery out for now, and try to seal up the crack in the tail light, reinstall it and see how it goes.
Has anyone else dealt with this? Is there anything I'm missing? I've read several threads on here but they were older so I'm wondering if anyone has learned anything new since those.
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