ONSTAR WILL DRAIN YOUR HUMMER H2 BATTERY

[@sidcollins5309]

After trying everything, (disconnect onstar, radio,seats,etc.) to stop battery drain I realized that wet carpets from past leak was the problem due to electric connections underneath seat. After leaving all doors open, under a carport, during the heat of summer for about 2 weeks the carpet finally dried out completely. The battery drain stopped. It stays under cover now, only driven on dry days.

[@jackg45]

If you have a battery killing drain that occurs sometimes, not all the time, check your interior dash head light switch. The switch has a wheel type dimmer control it should feel tight with no wobble. As the switch ages, it can cause a drain and kill your battery. I am not sure, but I believe it is due to the dimming wheel getting loose and a little wobbly. The looseness of the wheel can cause a constant internal connection that will kill your battery. It is an intermittent drain and battery killer because when you use the wheel sometimes the wheel position is left in the correct position and other times it if left in the wobbled offset position that causes the draining. If you are not sure about your switch, just change it. It is not expensive and at least you can rule it out.

[@kianustarr]

Thanks so much for this information, Brother. That's EXACTLY what's happening to my 2004 H2. I've been wondering what's been the issue.

[@jeszepeda22]

I have been working on a 2006 Hummer H2. It now has a new battery, alternator, all fuses and relays, drive belt (it needed it), and it still drains at night after resting 7 or more hours. I'm going to check on this tomorrow. Edit: The owner of the Hummer added a Viper alarm just like the one you described. And every 3 months, like clockwork, there's a battery issue. I'll check that too, and update later.

[@dailydrivenH2]

I learned that in the past some installers always warned me about older viper alarms not being installed properly and eventually become battery eaters.

[@jeszepeda22]

@@dailydrivenH2 well the viper alarm has been eating it... it happened again today and after following all the wires, I found the viper alarm box under the steering column. Problem is once its disconnected, the only way to open the doors is manually and the owner doesn't like that. We are going to see over night if disconnecting the alarm is the problem (or part of it since I still haven't been able to remove the Ostar).

[@JimmieAgapay]

Thanks for the info on the battery drain had a long problem chasing the battery drain on my H2, so I rip it out & no more battery drain once again thanks for the advice.

[@dailydrivenH2]

Glad I could help you thanks for watching

[@alaskabarb8089]

Thank you! That’s probably exactly what’s happening to my 2003 H2.

[@bu5761]

I have an OS-2Bose for the after market head unit. Green led stays on so mine may be a RAP or BCM issue. I will still remove the onstar crap anyway. Those 12v/cig lighter wires are a bitch to get on/off if you don’t remove the shifter cover first.

[@dailydrivenH2]

got my hands all messed up trying to disconnect them cig lighter cables .

[@jackg45]

2005 Hummer H2: I am planning to remove my OnStar unit to add a switch panel or pocket. I am thinking that I should not pull the VCM fuse (Fuse for OnStar), as it might be needed for other systems. Does anyone know if the VMC is used for anything other than the OnStar.

[@rafaelluis96]

Very good content buddy. I’ll look forward for more.

[@KingRalphFoster]

I just want to remove fuse. Any body Know where fuse is located ...

[@AlanTrades]

So just unplug the wires to the onstar ? What about the fuse?

[@randyfleming3004]

Once you unplug the wires on the back of unit your good.. You can leave the fuse where its at.. 👍

[@DIZEMANPHOTO]

I have a 2007 H2 with ON STAR, I would rather have a switch facia or CB Radio or PA System in that slot... I never use ON STAR, is there any reason I should not just yank it and put something else in that hole?

[@randyfleming3004]

I put a c.b. in mine and it slid right in the onstar spot

[@Didewro]

@@randyfleming3004 What model/brand CB did you use. I want to do the same think.

[@LiRaishhh]

I took out the on-star unit and battery got drained faster than ever within a matter of minutes now won’t crank and clicks when I turn it over any advice ?

[@dailydrivenH2]

Do you have an aftermarket radio or the stock one ?? Sometimes I had sen bad installations be the problem too . I f you watch one of my last videos on the H2 it’s really hard to trace this electrical issues. kzbin.info/www/bejne/qJbJho1pbtOae5Ysi=K2vNoxe_bGrXElBe

[@Didewro]

Ok is their a fuse that disable onstar? Or do i have to remove the dash.

[@dailydrivenH2]

I would take a part that center piece and just pull out the onstar module that should be enough .

[@Didewro]

@@dailydrivenH2 Added a remote start, car alarm, led warning lights. I need to go through and locate/remove parasitic draws. Question: Im not towing anything. Trailer connect at rear bumber is drawing amps. Is thier a fuse for that?

[@dailydrivenH2]

Have you taken the time to look at the connector for any wires underneath that may look worn out ??

[@Didewro]

@@dailydrivenH2 I just pulled the Data fuse and that stopped the drain......recharged the battery....plus bought a 7.5 amp tricle solor charger and sit in on the roof while sitting....all good now.

[@dailydrivenH2]

Good to know 👌

[@sherrihitt1565]

I have a 2006 H2 with battery draining. Could it be an ONSTAR issue with a 2006?

[@dailydrivenH2]

It could be a possibility. The easiest way to find out would be to take of the onstar module.

[@longlivechina7538]

I pulled the onstar fuse but still dying. Do you think i should pull out the console piece? Thx man

[@dailydrivenH2]

I would pull out everything.

[@longlivechina7538]

@@dailydrivenH2 thank you

[@Didewro]

Where is the fuse?

[@longlivechina7538]

@@Didewro bottom right, google it, it was the battery terminal that need cleaned

[@longlivechina7538]

Hey bro, my battery total drain after a few hours any thoughts? I let it run for 5 min after a jump, maybe didn’t let run long enough?

[@dailydrivenH2]

Try about 30 mins see what happens

[@longlivechina7538]

@@dailydrivenH2 good call ran for 30 min everything seems good now

[@dailydrivenH2]

Thats great to hear

[@edgarleo2858]

Amigo perdona mi ignorancia pero para que es el on star ??

[@dailydrivenH2]

Hace tiempo cuando casi nadie tenia cell valia la pena tener el servicio de onstar basicamente te da tu propio numero de telefono para el carro si tienes un accidente grande el systema llama al 911 solo , te ayudan si estas perdido con direcciones y tambien si te roban el carro te pueden ayudar a encontrarlo . por todo eso se paga una mensualisad , en algunos carros ya viejos ese systema no funciona y se come la battery algunas beses por eso quite el mio .

[@makatv2176]

Amigo tengo un problema mi h2 se prenden u apagan la luces de adentro y las puerta se bloquean y se desbloquea. La larma dejo de funcionar y el tableros sale el candado abierto que indica que una puerta está abierta

[@dailydrivenH2]

tienes alguna alarma que no sea la original ????

[@amgeezy_2709]

Need someone to 3D print a cubby to fill that spot now without the on star.

[@randyfleming3004]

Thank you, awesome 👍

[@AG-tm3yc]

I’m not saying it’s not possible. But I have owned several old gm’s never upgraded onstar. If all the old onstars did this there would be a crap ton of gms eating batteries. Sounds like your gm was molested which caused a multitude of issues. If you are chasing a draw, take out fuses that you can track. Once you narrow down the block in question you can find the issue. Found a bad pigtail this way

[@dailydrivenH2]

Its been a known issue for onstar to kill the battery on older vehicles for years ask any older gm tech and he’ll tell you .

[@AG-tm3yc]

Again I’m not saying it couldn’t I’m saying do your due diligence. Onstar should only look for a signal if activated. I have 2 gms in my driveway 04 and 05 with analog onstar. I’m sure there are other factors with the vehicles with voltage issues as gms are persnickety.

[@dailydrivenH2]

@AG-tm3yc the old analog onstar module is always looking for a signal that will never find cause it was shut down after gm started to offer the upgraded units to transition to digital signal.all the module needs is power to be constantly looking for a signal weather it was activated or not . Back in the days it was a normal piece of advice from the service guys to tell customers assuming your onstar is the issue just jank the unit out or just pull the power cable from behind the module and you be all set )

[@Didewro]

I plan to remove mine after i figure out what type of head unit i want to install.

[@dailydrivenH2]

For years i had been trying to get a aftermarket unit just cant pick one .