Multimeter results: do i have a parasitic draw?

crazyone64 · Jun 6, 2021

Car is stored, not driving it right now.
Battery lasts less than a week.
Bought a new battery, still lasts 5 to 7 days.
I've attached the multimeter results if someone could help confirm if I have a parasite.

Noobz347 · Jun 6, 2021

The short answer is "yes" you have a parasitic draw. All computer-controlled cars do.

I agree that 7-days on a fresh battery is excessive but an El-Cheapo battery with a small reserve can help contribute to that.

One of the first things that I would check is the alternator. If the diode is bad then the battery tries to run the alternator like a motor when the engine is off.

After that, I would begin a process of elimination by pulling fuses one by one and checking the current draw from the battery as you do.

View: https://www.youtube.com/watch?v=KF1gijj03_0&ab_channel=EricTheCarGuy

crazyone64 · Jun 6, 2021

Noobz347 said:
The short answer is "yes" you have a parasitic draw. All computer-controlled cars do.

I agree that 7-days on a fresh battery is excessive but an El-Cheapo battery with a small reserve can help contribute to that.

One of the first things that I would check is the alternator. If the diode is bad then the battery tries to run the alternator like a motor when the engine is off.

After that, I would begin a process of elimination by pulling fuses one by one and checking the current draw from the battery as you do.

View: https://www.youtube.com/watch?v=KF1gijj03_0&ab_channel=EricTheCarGuy

Thanks for the reply.
It turned out to be 2 areas..
1. I disconnected my car audio fuse holder which is under the hood. That dropped it from 2.6 to 1.8.
2. Under the hood fuse #6. 40a. Instrument Custer, powertrain control module. And it dropped from. 1.8 to 0.

Any ideas about #2?

crazyone64 · Jun 6, 2021

I found that #6 pertains to:
Interior fuse box:
#1
#7
#13
#19
#25
#31

I'll try removing these next and hopefully see the culprit

crazyone64 · Jun 7, 2021

With the battery disconnected, I removed the mentioned fuses that I thought pertained to #6 under the hood..

I closed the door, inserted the #6 under the hood, the drain is present.

I was hoping that by removing one of those 6 fuses, or all 6, would stop the drain.

Is it fair to say it is the pcm?

Noobz347 · Jun 7, 2021

So wait... Does the number 6 fuse cause a significant drain?

If so, I'd be looking at the instrument cluster according to your image.

What takes you to the PCM?

Noobz347 · Jun 7, 2021

Oh, I see... It does both.

Pull the cluster and get a good lock at the back of it. See if you have any shorts or burnt leads.

crazyone64 · Jun 7, 2021

Noobz347 said:
Oh, I see... It does both.

Pull the cluster and get a good lock at the back of it. See if you have any shorts or burnt leads.

Thank you, I will remove the instrument cluster and post pics tomorrow.

What if I disconnect the instrument cluster and retest with my multi, with all fuses back in.
This should confirm if it's draining my battery right?

crazyone64 · Jun 8, 2021

I disconnected and removed the instrument cluster,
Put all fuses back in.
Retested with the multi.

I still have the battery drain.
I guess this implies it is my pcm?? since the issue is present with the cluster removed and those were the only 2 options according to the manual (pcm / cluster)
Any advice?

crazyone64 · Jun 8, 2021

crazyone64 said:
I disconnected and removed the instrument cluster,
Put all fuses back in.
Retested with the multi.

I still have the battery drain.
I guess this implies it is my pcm?? since the issue is present with the cluster removed and those were the only 2 options according to the manual (pcm / cluster)
Any advice?

I noticed fuse 35 inside the car is for pcm, I removed it as well and the drain is still present.

Noobz347 · Jun 8, 2021

Try disconnecting the PCM.

crazyone64 · Jun 8, 2021

Noobz347 said:
Try disconnecting the PCM.

Thank you, I will do exactly that and report back tomorrow.

crazyone64 · Jun 8, 2021

crazyone64 said:
Thank you, I will do exactly that and report back tomorrow.

crazyone64 · Jun 10, 2021

I unplugged the pcm, Retested and I still have a battery drain.
Im confused, I removed both the instrument cluster and the pcm. How can I still have a drain?

Please help

crazyone64 · Jun 10, 2021

Found the parasite:
Fuse 39 5A GEM

Once I yanked that bugger, the drain stopped!

7991LXnSHO · Jun 11, 2021

crazyone64 said:
Found the parasite:
Fuse 39 5A GEM

Once I yanked that bugger, the drain stopped!

So what is that supposed to run?

crazyone64 · Jun 11, 2021

7991LXnSHO said:
So what is that supposed to run?

I found the following in another article.

"One of the keys to solve this problem is to look at the INPUTS to the GEM. It seems possible to me there is some signal that is keeping the GEM awake (or causing it to wake back up).

Door ajar
Driver's door key lock activation.
interior lights
trunk ajar
remote door lock/unlock "

Noobz347 · Jun 11, 2021

Check all of your door switches, and column and console switches.

Something may be keeping the GEM module from going to sleep.

crazyone64 · Jun 11, 2021

I found in the manual a section for 'wiring diagram component location'

Component: Generic electronic module
Wiring diagram: Body Control modules, electronic suspension

I'll try and upload the 2 diagrams if anyone is familiar with wiring diagrams?
I can't make sense of it yet but I'm hoping someone here can

Noobz347 · Jun 11, 2021

Start with the simple stuff like door and trunk latches. Make sure the courtesy lights turn off.

Multimeter results: do i have a parasitic draw?

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