2018-2021 Jeep Compass Battery Dies Overnight. Auxiliary (Start Stop) Battery Testing/Replacement.

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Today we have a 2018 Jeep Compass that has a battery that will die every night. The customer has already had the main battery replaced, but continues to have to jump start their car every morning. This vehicle is equipped with an auxiliary (aka start stop) battery. We show you how to isolate this battery as a cause and even show you some testing and theories behind performing what is called a parasitic load (aka current draw) test to determine the cause of this issue. This is a pretty common issue on Dodge, Jeeps, and Chrysler products and generally speaking we usually recommend just replacing both batteries at the same time when you get one. Nowadays, parasitic load issues are pretty uncommon due to body control modules having the ability to disable circuits that are causing the draws, but knowing how to test it can still come in handy at times. This should be the same procedure on 2018 Jeep Compass, 2019 Jeep Compass, 2020 Jeep Compass, and 2021 Jeep Compass.

Опубликовано:

12 сен 2024

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Комментарии : 70

@top20louisiana11 Год назад

I replaced my auxiliary battery today with a size 10 and 13, wasn’t hard at all just don’t play around with that electrical stuff. Must be a AMG or the battery will fry in no time. The start/stop still is tripping so I just turn it off when I drive. This is the first day in a week I was able to start it without jumping the battery. Thanks again my hero!

@top20louisiana11 Год назад

Here’s an update: I Haven’t had any problems starting my Jeep; only annoying thing is the start/stop won’t work, I don’t care about it so I just turn it off when I drive

@CaretHalfgem 8 месяцев назад

@@top20louisiana11how did you turn off the start/stop function?

@top20louisiana11 8 месяцев назад

@@CaretHalfgem it’s by the gear box. The start stop icon is an A with Circle around it. Just push it and it will stop it

@CaretHalfgem 8 месяцев назад

@@top20louisiana11 lol that’s easy enough. It’s from my step daughter’s car. Thank you.

@top20louisiana11 Год назад

I have the same issue. I have Jeep Trailhawk and wouldn’t crank for work one morning. I had to buy a Noco GB40 to jump auxiliary. I am going to auto zone in the morning to have this pain in the but removed. Thanks so much for this video, keep at it bud!

@VictoryousTheGloryous Год назад

This was exactly the same issue I was having in my Compass. So glad that your video came out right around when I was experiencing this problem. I thought my 1 year old battery had somehow gone bad early and so I got it replaced under the warranty but it still died if I didn't drive it for 3 days. I started tracking the voltage and realized something must be drawing extra power from the main battery. Ended up having to jump my car about 5 times before I finally got the aux battery replaced. So far so good.

@automotiveinsight Год назад

That’s awesome!

@saltdrum 9 месяцев назад

same

@saltdrum 9 месяцев назад

thank you for your video. i cant believe i was staring right at that aux battery and never saw it.

@franklincormorant8312 8 месяцев назад

I swear these Compass aux batteries are scheduled to die right at 60K miles. Every one I deal with has 60-65K on it.

@CSUnited14 7 месяцев назад

died at 39k yesterday here but it is a 2018

@iamriddim9143 7 месяцев назад

@@CSUnited14I got a 2018 and mine died at 80k miles just the other day and my transmission is slipping now :(

@josephsellers5978 6 месяцев назад

I mean that's a good four to five years on average, doesn't really sound excessive to me.

@derek.doesitwell452 6 месяцев назад

It’s only funny cuz this deadass true nd this car needs a damn recal

@usmc_7934 5 месяцев назад

@@iamriddim9143 same

@TheMainManChuccy 7 месяцев назад

Thank you so much man! I’ve been going through hell with my compass! I finally got my auxiliary battery and my car works perfectly now

@GTXKen Год назад

Thanks, I just sent this to my buddy who is having issues with their compass

@EmmanuelGloriaBMore Год назад

Thanks you saved me a trip to Jeep dealer and 4 or 5 days of diagnosis.

@ca96766 Год назад

My thoughts exactly ….. me as well

@JaggerSebastian 11 месяцев назад

Passive entry is draining the aux battery. Everyone should turn it off especially if you are having battery problems.

@talibanstrode6744 11 месяцев назад

How do you do tiis

@LushonM Год назад

Currently sitting in my 2018 Jeep Compass that decided that it didn’t want to start this morning. Now I have to go change my auxiliary battery bc the car starts when the regular battery is charged. At least I know the it’s the second artery for sure.

@brettzirkle131 9 месяцев назад

Solid video, saved me tryin to change a starter!!

@gilbertouzcategui668 Год назад

Hey thanks for the amazing and helpful video. Is there anyways to completely remove the aux battery and just use regular battery and don’t use the save gas function ?

@automotiveinsight Год назад

Thank you. I haven’t seen anything that allows you to get rid of the other battery. With enough ingenuity anything can be done, but it probably isn’t worth it. They do sell start stop disablers though.

@Realistic702 7 месяцев назад

I'm subscribing to your Chanel your videos are different you add a laugh to it I love it!

@automotiveinsight 7 месяцев назад

Haha! Thank you.

@xilbus Год назад

Can you boost the aux battery?

@LaZerMouse 8 месяцев назад

Great video. I’m an emergency situation, u would jump start the car by connecting to the main larger battery? Thank you

@eldendevoe6909 3 месяца назад

Thanks very helpful

@delsinmcgrath882 8 месяцев назад

You are a God send!!!

@titanTitan-oo9hi Год назад

Since the car is five years old, would it be wise just to change the main battery as well?

@automotiveinsight Год назад

If it’s original, then yes. This car just had the main battery replaced.

@jimmyr4981 6 дней назад

Hi, have 2018 compass. Says stop safely vehicle will shutdown and battery light on

@SweetnspicyXx 28 дней назад

I am getting a click and the emc warning. Monday my neighbor is going to change it out for me.. ugh I hate not being able to drive my jeep.

@DanLoFat Год назад

Dude that's hilarious using inagodadavida as a Time counter just listen to the song four times album version. Maybe only needs threeAnd a half times ! The longest side I remember on an album would have been 18 and a half minutes I think was the most they could get out of it, and inagodadavida had to be between 15 and 18m. Think I have that correct. I have the album I mean the original vinyl.

@automotiveinsight Год назад

Thank you! Peter Frampton’s live version of “do you feel like I do” is pretty freaking long too!

@beckibenz1136 8 месяцев назад

Place i took mine said aux battery tested fine, but this keeps happening and I’ve gotten 2 new batteries

@daniellaarredondo7987 Год назад

Could this be why my main battery dies every 3 months?

@demetriagriggs1482 Месяц назад

After changing the auxiliary battery, do you have to reset?

@kellymac76 10 месяцев назад

I have a 2017 Compass and the start/ stop has been a problem sinceI got the car but at year 3 it became a nightmare. Dealer of no help. I reached the point that I would stall at every stop sign and intersection. I finely turn off the start/ stop the last year. and all was fine. I have never got a warning message. on my dash. A week ago the battery is dead at my mountain house. Finely after getting someone with a Bronco we were able to jump the Aux battery after letting the Bronco run for 40 minutes. . My question is my main battery is still the original battery. The car has run fine for a week and made a 10 hour drive fine. Do I change out both batteries? I don't trust the dealer and I have a good repair shop I think can do the work. Can you suggest a portable battery charger that will start the Aux. battery when in a situation like being stranded on a mountain and no roadside assistance anywhere near you?

@automotiveinsight 10 месяцев назад

It’s not going to hurt anything to change them both. As far as portable battery chargers: I carry a NOCO GB70 with me at all times. It’s a bit pricey, but will jump start pretty much anything.

@tomcat375 9 дней назад

So if my car got a bad auxiliary battery is going to drain my main battery?

@decarlosperry5111 Месяц назад

Can my auxiliary battery drain a new main battery I replaced my main battery a few days ago but not the auxiliary they both were the original ones when I got the car it’s a 2020 and I got it about 2 years ago I did once have to take it to the dealership for them to recharge it. When I replaced the main battery it started and everything came back on I didn’t drive one day and when I went out yesterday after it hadn’t been driven it was dead all the lights and nothing would come on I’m hoping I just have to change that battery and it’s nothing worse

@PinkyxWinky Месяц назад

Yes. It can drain it. I’m literally sitting in my compass typing this waiting for AAA to bring me a new one lol

@decarlosperry5111 Месяц назад

@@PinkyxWinky sorry to hear that hopefully they’ll get to you quickly

@raudy_4519 Год назад

So Usefull! Thank God i found this video does the aux battery also make jeep malfunction like sending codes service engine and other codes like U1428 also noticed that the auto off light would come out causing it not to work...

@automotiveinsight Год назад

Idk about that specific code, but weak batteries cause all kinds of dtc’s and faults.

@taylorknight5379 11 месяцев назад

my jeep was giving that same code yesterday after my car keeps dying! did the aux battery help?

@debpriebe1880 4 месяца назад

Both batteries have been replaced. Issue remains. Any idea?

@user-zl6vn5zp9w 11 месяцев назад

I have a question is it required to keep the battery insulated blanket on the main battery of a 2018 Jeep compass?

@rturo101 11 месяцев назад

My dash is reading my auxiliary battery is in a protection mode, it’s been replaced 2 years ago, my main battery was drained and had to be boost off. Should I change both batteries or the main?

@rturo101 11 месяцев назад

The start/stop function isn’t working because of being in the protection mode

@talibanstrode6744 11 месяцев назад

My girlfriends car throws a bunch of codes then they go away then they come back days later ? Could this help. The dealership was no help

@casyematthews3946 10 месяцев назад

Literally blew me away. Just had this happen to me and all the service shops wouldn't help me and I just recovered from the flu and then bam my battery dies. I got a jump then the camera won't turn off. Then today it died this morning won't turn on or take a jump. But no one I said no one knew there was an axillary battery . And thar battery is at least 5yrs old today and jas never been replaced. Gonna try this Wednesday 100% sure this is it. 😅 wish me luck.

@automotiveinsight 10 месяцев назад

Good luck!

@iamriddim9143 9 месяцев назад

Yo did it work?? My car has been dead for 1 month after 5 battery replacements in 2 weeks. Im thinking this is the problem and I’m very interested in knowing if this fixed your car!? Im thinking this will fix mine

@casyematthews3946 9 месяцев назад

@iamriddim9143 I did work. My car runs fine now. But my back up Camara is still on.

@casyematthews3946 9 месяцев назад

@iamriddim9143 It needs 2 batteries. My main still reads low but no issues whats so ever. Even my start/ stop started working again. I plan on replacing the main battery at my next oil change

@grandsport3270 Год назад

Will this stop the truck from starting up even if attempted to jump it ?

@CSUnited14 7 месяцев назад

gotta jump off the aux battery i couldnt get a crank from main so put jumpers on aux battery started right up

@user-kj1iq3cs9b 15 дней назад

My auxillary batter is under my fuse box , can't believe those idiots at jeep would make it do difficult to remove the auxiliary battery on the 2019 trailhawk.

@Hobistar7 Год назад

4:08

@bluesman3794 Месяц назад

Just eliminate auxiliary battery if you’re not using the start stop function. Connect pos to pos and neg to neg battery terminal. Not rocket science. Lol

@ronaldoquintos1675 6 месяцев назад

All these vehicles are peace of garbage. They make it have a battery drain after a few years. Then they make its so that the modules will go bad as a result of jump starting the vehicle. I just worked on one it’s not the auxiliary battery causing the parasitic drain. I gave it back to the customer. I told him it’s gonna cost 150 dollars an hours to diagnose it, and 800 dollars just to start. I meant to run them away. I work with hybrid and electric vehicles I ain’t got time for regular car with cheap customers