shane h.
Well-Known Member
2019 JLUR. Went to start it yesterday and got clicks. What time is it???
Bought a hoss of an H7 AGM battery. Put that in and the Jeep started right up. But I'm left with a 34 month old crappy AUX battery that is just going to cause me grief - probably in the worst spot possible... halfway up Black Gap Road 100 hard miles from any help at all.
Pulled the passenger fender flare (broke 4 clips, but had 12 extras ready). So easy.
Disconnected the AUX ground from main battery and applied a copious amount of electrical tape to the end of it.
Removed the main battery so there would be room to maneuver in there.
Disconnected and removed the AUX battery.
Disconnected all of the main power lines from the PCM so there would be room to snake the AUX positive cable up into main battery area (this took forever - remove that crappy red cover first).
Reinstalled all of the main power lines to the PCM.
Reinstalled the main battery in the compartment.
Attached positive lead to main battery.
Worked on the AUX positive lead so it would fit on the main positive lead.
Attached the AUX positive lead to the main positive.
Attached negative lead to main battery.
Started up the Jeep. NO WARNING LIGHTS
Edit: Just drove around 20 miles on the single battery set-up. Voltage display went from a constant value of 14.3v to 14.4v down to a constant value of 12.7v to 12.8v. I'm calling this a win.
Jeep is paid for and out of warranty, so I figured WTH and went this route rather than having to replace both batteries every time that dinky AUX battery decides to die. And finding the AUX battery here in DFW is nigh on impossible right now anyway.
Bought a hoss of an H7 AGM battery. Put that in and the Jeep started right up. But I'm left with a 34 month old crappy AUX battery that is just going to cause me grief - probably in the worst spot possible... halfway up Black Gap Road 100 hard miles from any help at all.
Pulled the passenger fender flare (broke 4 clips, but had 12 extras ready). So easy.
Disconnected the AUX ground from main battery and applied a copious amount of electrical tape to the end of it.
Removed the main battery so there would be room to maneuver in there.
Disconnected and removed the AUX battery.
Disconnected all of the main power lines from the PCM so there would be room to snake the AUX positive cable up into main battery area (this took forever - remove that crappy red cover first).
Reinstalled all of the main power lines to the PCM.
Reinstalled the main battery in the compartment.
Attached positive lead to main battery.
Worked on the AUX positive lead so it would fit on the main positive lead.
Attached the AUX positive lead to the main positive.
Attached negative lead to main battery.
Started up the Jeep. NO WARNING LIGHTS
Edit: Just drove around 20 miles on the single battery set-up. Voltage display went from a constant value of 14.3v to 14.4v down to a constant value of 12.7v to 12.8v. I'm calling this a win.
Jeep is paid for and out of warranty, so I figured WTH and went this route rather than having to replace both batteries every time that dinky AUX battery decides to die. And finding the AUX battery here in DFW is nigh on impossible right now anyway.
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