Jumping battery if alone?

[imapseudonym]

Looks like the dual battery setup is the only safe way if you’re going to be out and about on your own since none of these battery packs work

We’ll be purchasing the genesis setup. Had it on our jk and it was awesome.

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[sjappers]

I don’t know for sure...I used it recently in a different dual battery system. It wouldn’t start right away...but I left it connected for a few minutes and it then started the vehicle up. That being said I still don’t like not having quick access to that smaller starting battery, so I am yanking it out.

how do you jump start the jeep? on all other cards I would hookup both clips to battery terminals on running vehicle, then neg and pos to batter terminals of jeep jl? neg first... that should work right? or is it more complicated than that?

on a side note I did a test this weekend and the gb150 ran my dometic fridge over night set at 21deg F in garage that was 55deg F

 

[47Jeepster]

how do you jump start the jeep? on all other cards I would hookup both clips to battery terminals on running vehicle, then neg and pos to batter terminals of jeep jl? neg first... that should work right? or is it more complicated than that? ...

Always attach the positive terminal first on each vehicle! The reasoning is this; by hooking up both leads at the charging vehicle and the negative lead at the dead battery you've effectively created a welder. Drop the positive lead on a grounded spot and you'll see lots of sparks. I've been told that if you do this with the motor running on the charging vehicle, you stand a chance of frying the alternator. One other thing ... if you make the last connection (negative at the dead battery) you stand a chance of arcing and igniting any gas that is around the vents on the dead battery. So, use a good ground location on the body of the Jeep.

Here's the official (read that safest) method:

 

[will1111]

This guy cracks me up

 

[RussJeep1]

how do you jump start the jeep? on all other cards I would hookup both clips to battery terminals on running vehicle, then neg and pos to batter terminals of jeep jl? neg first... that should work right? or is it more complicated than that?

on a side note I did a test this weekend and the gb150 ran my dometic fridge over night set at 21deg F in garage that was 55deg F

@sjappers : nothing about the standard method of jump starting a JL, particularly at least how you connect the jumper cables from another vehicle, is different than in other vehicles, as @47Jeepster included the graphic for.

What might be considered different, at least according to the manual is to effect the connections while the working vehicle is off, and then to start this vehicle and wait a couple of minutes before attempting to crank the disabled JL.

What I'd like to know is what's happening during those few minutes you are suppose to wait. My guess--and maybe it's already mentioned on the bboard--is that some level of charge is first being applied to the ESS/Aux battery that the JL's computer needs to see on this battery alone, before even attempting the crank.

 

[RubenZ]

I didn't read most of the thread but can't SOLAR power be used in this situation to provide trickle charge constantly? Just wondering if this is an option. Say you stop to eat for an hour or so at least the Batts can be getting g a trickle charge.

 

[RussJeep1]

I didn't read most of the thread but can't SOLAR power be used in this situation to provide trickle charge constantly? Just wondering if this is an option. Say you stop to eat for an hour or so at least the Batts can be getting g a trickle charge.

Ruben: I have one of these on another rig that tends to not see much use anymore, relegated to my driveway, and I like it. It's about 12" x 2" in size and plugs into the cigarette lighter. I'd like to think that it helps a fully charged battery stay that way against the forces of time, as oppose to usage, that tend to draw charge away from the battery. Does it work? I've never had a problem with battery charge preventing the rig for cranking, but I'd be hesitant to say yes. I don't think it hurts--at least I hope not.

But the OP was describing a situation where off road appliances like a refrigerator, likely operated when the rig is off and its alternator is not charging the batteries might deplete the batteries' charge, despite auto cut off technology associated with the appliance, based on monitoring battery strength.

A trickle charger in this case is more likely not effective as it's not only being surpassed by the draw of power leaving the battery versus that it puts back in, but of limited use even on a battery that faces no load, is still rechargeable and not ready for the garbage can, but is at only a small fraction of its capacity.

As you probably realize, envision the trickle charger as the drops of water that fall into a swimming pool to counteract evaporative properties (i.e. loss of charge over time due strictly to natural forces) not pool drainage (i.e. appliance load) . Taking the analogy further, envision these drops of water to slow down in periodicity, ironically when needed most, when the pool is less than half full.



Now, would I like to see the rig top footprint sized solar panel above the rig, or that maybe comes to lie at an angle on ground that does more than trickle charge, you bet.

 

[ormandj]

I had a JL, no start situation. A tow guy came with a brand new power pack ... I believe it was 6000 amps. The guy had charged it up overnight and I was first customer that day he used the power pack on. NO, would not start the JL. All it managed to do was get the evic lights to light up and no more.

So, we took battery cables and used his flat bed truck battery bank as the donor. Hooked up the battery cables and let it sit for say 3-5 minutes and YES, the JL started right up.

IF, if I thought a power pack like your would do the deed, I would have one in the back of my JL. Can tell you, I carry battery cables in the back all the time now.

.

How was a 6000 AMP supply not able to start the JL? That's waaaaay more current than anything would need to start. Did it not supply power when attached to help 'charge' your drained battery, as I assume the jumper cables did with the 3-5 minute wait?

 

[Rhinebeck01]

How was a 6000 AMP supply not able to start the JL? That's waaaaay more current than anything would need to start. Did it not supply power when attached to help 'charge' your drained battery, as I assume the jumper cables did with the 3-5 minute wait?

@ormandj

All I can attest to is it did not. With the battery cable approach, it started right up. I might mention that others here have also stated they have had bad luck with he power pack approach.

 

[ormandj]

@ormandj

All I can attest to is it did not. With the battery cable approach, it started right up. I might mention that others here have also stated they have had bad luck with he power pack approach.

Strange. I'll have to test next time I see a JL with a 3.6 (my order is 2.0). I've got a few jump n' carry packs that have started 7+ liter diesel engines. Wonder what would cause that. Those dinky Chinese clone starters don't have much cranking power so that makes sense, but not a 6000A monster. My biggest pack is 800A if I remember correctly and I haven't found anything it wouldn't start multiple times.

 

[Rhinebeck01]

@ormandj

The flat bed truck guy was at a loss when his power pack could not start the JL. He said it was a recently new power pack and it was fully charged and it had not been used prior to my vehicle that day. He mentioned that he started "big rigs" as he called them with the power pack.

When I asked if he had battery cables he went and got them but I truly think he was saying to himself that this jeep is not going to start and will have to be flat towed. He looked surprised that the cables did the deed...

I have to lets commend the tow guy... he got my respect lets say... because, when he went to connect the battery cables to my JL, it was obvious the cables would rest on the JL's painted fenders... with no prompting on my part, he took off his hoodie sweatshirt and used it as a fender cover to protect my Jl's fender from possible damage. That alone got him a $15 tip. 8)

 

[Mousehunter]

Well mine is bricked in my driveway at the moment. Both main and aux are dead and both are registered bad on my smart chargers. 12hrs of trickle and still 6v on the main. Can not even trickle the aux. starter feature on my Schumacher will not start it. Not sure if I will test the booster before I try chump starting it yet

 

[AlamedaJeep]

@ormandj

The flat bed truck guy was at a loss when his power pack could not start the JL. He said it was a recently new power pack and it was fully charged and it had not been used prior to my vehicle that day. He mentioned that he started "big rigs" as he called them with the power pack.

When I asked if he had battery cables he went and got them but I truly think he was saying to himself that this jeep is not going to start and will have to be flat towed. He looked surprised that the cables did the deed...

I have to lets commend the tow guy... he got my respect lets say... because, when he went to connect the battery cables to my JL, it was obvious the cables would rest on the JL's painted fenders... with no prompting on my part, he took off his hoodie sweatshirt and used it as a fender cover to protect my Jl's fender from possible damage. That alone got him a $15 tip. 8)

I've never used a power pack so I don't know how it differs from jump starting from another vehicle. If the power pack were connected for a few minutes before attempting to start similar to what seems to work when jump starting from a vehicle, would that make a difference?

 

[ormandj]

I've never used a power pack so I don't know how it differs from jump starting from another vehicle. If the power pack were connected for a few minutes before attempting to start similar to what seems to work when jump starting from a vehicle, would that make a difference?

It should be the exact same, assuming the power pack provides current when connected. I'm just wondering if there's some safety feature in the power packs that's preventing them from working with the JL/3.6 and aux battery combo thing. Someone should put current clamps on the leads and see what happens when first attached (take voltage too), and then when trying to jump start.

 

[LennyV]

Just bought a power pack. Following this thread.

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