Tazer ESS Battery Testing

[Jebiruph]

@Jebiruph it seems to over complicate things taking voltages off N1and N2, as you have pointed out to get just basic voltsge of each both battery one only needs to remove one cable and just swap the nagative leads around

Yes and if you are regularly monitoring both battery voltages, putting an m8 1.25 wing nut on that ESS negative cable will facilitate cable removal.

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[WranglerMan]

Well here is day 7 and all seems normal, next week I am plugging in the Tazer after my batteries come off the tender and we will again test voltages, but this this past 7 days it seems I have no issues at all having the Tazer married with a few vehicle changes made but not plugged in so not using any live features

Day 7

12.62 Main
12.62 N1
12.61 N2
12.62 ESS
13.5 EVIC

 

[OldGuyNewJeep]

Yes. Both battery's positive cables connect to the main battery positive, so moving the negative meter lead to the disconnected ESS negative cable gives you ESS battery voltage.

In attached photo (stolen from another thread) which one is the ESS negative?

Re: parasitic battery draw by the Tazer, I’m convinced there’s a specific combination of settings/hardware that is to blame. Time will tell when Joe narrows it down. All I can tell you is that my battery is exactly the same with and without the Tazer plugged in. My 12.4x resting voltage, I believe, is due to the cold weather. When I pull off my tender it’s like 12.9x. After sitting a few hours in the cold, it’s back to 12.4x. This is with no Tazer. Everything, including ESS, works fine. Driving even a short distance puts my voltage test into the 12.6x range. (Warm battery from engine heat and alternator topping it off is my guess.)

TL;DR - I believe my Tazer is not wearing down my battery, and so I’ve plugged it back in.

@Rhinebeck01 - FYI that pulling the radio fuse does not, unfortunately, do the same thing as issuing a full reboot via the Tazer. While it did restart my radio (and wiped out some preferences), it did not fix my missing reverse lines. Plugged in my Tazer, issued a reboot, and viola - lines are back.

 

[Rhinebeck01]

@OldGuyNewJeep
Pull the TWO fuses and l believe it will. Your pulling F11 alone is a no go.

#6 in pic is ESS neg.

 

[OldGuyNewJeep]

@OldGuyNewJeep
Pull the TWO fuses and l believe it will. Your pulling F12 alone is a no go.

#6 in pic is ESS neg.

Thanks!

I will try, next time, to satisfy my curiosity. I only pulled the one marked radio (I think it was F96 or F97 - I can’t recall).

 

[OldGuyNewJeep]

@OldGuyNewJeep
#6 in pic is ESS neg.

Excellent, thank you. Now that my Tazer is back I will monitor both batteries.

 

[Rhinebeck01]

@OldGuyNewJeep

I typoed. It's F11.... and F97.

 

[OldGuyNewJeep]

Yes and if you are regularly monitoring both battery voltages, putting an m8 1.25 wing nut on that ESS negative cable will facilitate cable removal.

OK, I measured each battery independently and they are exactly the same - 12.55, each. Jeep has been sitting for 2hrs since I last drove it and is still warm. I’ll repeat this test every day to see if there is any change.

 

[WranglerMan]

I’m going to plug my taser back in next week and start my 7 day test all over but currently with my Tazer married and not plugged in when I get in my JL the EVIC displayed voltage is in the 13.4-13.7 range and that’s after it’s been sitting for 10-12 hrs and both batteries are in the 12.55-12.65 range and these are isolated battery readings as I have a M8 wingnut on the negative ESS terminal #6 in the pic so it’s pretty easy to pull off and do a quick check of both.

After a 30-45 min drive the EVIC displayed voltage is in the 12.6-12.8 range at idle and like always it ramps up to over 14 when braking or just letting off the gas and ESS along with everything else works perfectly so hoping when I plug the Tazer back in it does the same

 

[WranglerMan]

Here are my ending numbers after 7 days with the Tazer married and just a few vehicle settings changed but not plugged in, keep in mind that 12.66 is a fully charged battery at 80 deg and will drop approx .2 volts for every 10 deg so at 30 deg a fully charged battery will be approx 12.58, the voltages I have quoted here are what I have researched and not actually verified by me as it never really gets that cold here in Houston

My ESS average seems low but I can only guess it’s do to the size in amp rating so it may dissipate more quickly than the main.

After the 7 days I no longer took readings and all seems normal as ESS along with everything else works perfectly, currently EVIC displayed voltage is approx 13.3-13.8 and after 45 mins or so of driving it drops to the 12.7-12.9 range and ramps up to over 14 when slowing down

12.62 Main
12.62 N1
12.62 N2
13.1 EVIC
12.58 ESS

 

[WranglerMan]

Let the charging begin, hopefully in 10-12 hours I can pull some voltage readings then plug in the Tazer and start testing live features to see if my voltages are affected

 

[jeepauug]

seems something similar happened to mine - not sure if it is tazer related, but a couple days post tazer install (worked like a champ), batter dead. I noticed my auto start didn't work 1 day - but that "went" away. today, craziness then dead as a doornail.

 

[WranglerMan]

seems something similar happened to mine - not sure if it is tazer related, but a couple days post tazer install (worked like a champ), batter dead. I noticed my auto start didn't work 1 day - but that "went" away. today, craziness then dead as a doornail.

Several have commented that they believe keeping the Tazer plugged in slowly drains there battery but I cannot and will not say that the Tazer killed my battery that was replaced under warranty but after installing it I started seeing higher than normal voltages displayed and ESS quit working after I removed the Tazer as the battery was bad and it never charged to the point so ESS would work

I spent the first week with the Tazer married but not plugged in reading daily voltages and all have been good and even not after almost two weeks all works as it’s supposed to but the Tazer is not installed it’s just married to my JL and I am only taking advantage of a few vehicle settings like tire size, tpms limits and I think the seat belt chime is disabled but that’s it and no live features are being utilized which requires it to be left plugged in so now after my JL comes off my battery tender I will again take daily voltage readings and compare those to what I got with it unplugged.

 

[WranglerMan]

Well just went out to check the tender and after approx 8.0 hrs we are good to go

So here are fresh off the tender voltages and just like before the voltages are high but will settle down within a few hours and I will report those later today but here are the current ones

Day 1

13.07 Main
13.07 N1
13.06 N2
12.7 EVIC
13.05 ESS

Tazer JL using 11.06 and have tire size set along with TPMS limits adjusted but now am using the below live settings which require the unit to be plugged in so we will see how the voltages shake out over the next week

Track kill off
SS Kill on
AP Kill off

Full reboot after all charges made, I also have my phone on the floorboard set to record video and am going to run it for 60 mins to see if the Tazer wakes up with it being parked and off

 

[jeepauug]

Hi there. Can you post pics of how you’re connected to the battery ?

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