Battery drain over night

Hi,

Are you referring to the light which indicates the anti theft system is armed? If so, it can't be turned off. What all have you checked so far? Take a look through this link. It explains a lot of different things that can cause this type of issue.

https://www.2carpros.com/articles/car-battery-dead-overnight

Let me know if anything there helps. Also, let me know how you are determining the draw.

Joe

i check everything today and its putting out 0.53 on my Innova tester when turn off over night , is that normal ? if not what number am i looking for this?

Good evening,

I thought I would throw mt 2 cents in for you.

The red light on the dash by the windshield is normal for flashing and cannot be turned off.

Normal draw is 50 to 75 milli amps. That is .050 to .075 amps.

How you check it is to remove the negative cable and put a voltmeter in line with the cable end and the battery. Set the meter to DC amps. Then let it sit for 15 to 20 minutes.

If the draw is higher than spec, remove the fuses one by one until the draw drops to spec. Then you need to find out what components are on that fuse and disconnect them one at a time until you find the component that is causing the draw.

Roy

Is that amps or milliamps? It it is milliamps, that is acceptable. If it is amps, then it's too high. It should be around .05 amps.

Sorry, not sure if it's amps or multiamp ?

That is 1/2 amp. Way too high.

When the reading is correct it will read .050.

Roy

Okay. Thanks guys for all feed back!! i re did all fuses again and had 1 fuse that made it drop to .42 and was mirror lights etc.. what else can i check under hood with tester to see why there is .42amps putting out? maybe a bad diode? did alternator test already and was good 14.3 when running .

That is still too high. It needs to drop to 50-75 milli amps.

Remove each fuse one at a time until it drops to that. Then let me know the fuse number and I will get the power distribution for that fuse.

Make sure the doors are closed and the hood is closed enough to turn off the lamp if you have one.

Roy

hi , i recheck all fuses and relays and stay the same .42 with 1 fuse out and wondering if .42 is good because i used innova 3300 and it said it's a multi-reader device. past 2 days i checked fuses and came to .52 with all fuses in . what do you think ?

No, again, it should be .050. You have 1/2 amp reading.

Can you take a picture of how you have you meter hooked up?

Roy

It's called multi-reader I guess?

I need to see where the leads are connected.

Roy

Here's a good picture:

No, this one sorry.

Good. Now leave them attached and remove each fuse one at a time and see if the draw drops.

Roy

yes, i did that 3 times in 2 days bud and not one fuse made it drop . stayed the same and pulled out . only fuse box i found was on the passenger side on my SUV. is there more fuses elsewhere i can check? I will take picture of box and was a lot.

Here box bud, thanks for your patience.

You have 3 relay panels but no other fuse boxes.

Did you disconnect the big wire on the back of the alternator?

Roy

no, i didn't disconnect the wire on alternator. what do i do?

Remove the wire from the back of the alternator. It should be held by a nut.

Then check the draw.

Roy

There's 2 wires going to alternator , 1 has black and red wire going to back in a plug in plug style no nut . And 1 black plug going to right side back of alternator with plug on plug style too. Which one I unplug? Thanks

The black/red wire is the one to disconnect.

Do you have the hood or a door open during this testing?

Roy

yes, and i don't have hood light and look around and nothing.

If you door is open, it will cause a draw. Make sure it is closed.

Roy

i can't get at alternator so going buy socket for it tomorrow. could i just unhook 1 cable that is coming to positive on battery that runs to the alternator? will that work ?

No, that turns off the test.

You need to disconnect the alternator.

Roy

I check again with alternator unplug and still at .44 and I have a actuator that clicks under dash board but I think that has nothing to do with anything.

Only had truck for 2 weeks and suspension light is on in the dashboard and wondering if that doing anything drain power?

Terry,

I wrote this and then after submitting it, realized I had the sequence mixed up. There are three things I need you to try. I indicated order at the start of each check. Sorry about that.


Roy, I thought you had it with the alternator / diode thought. However, I want to try something with this. Since the suspension light is on, there is an air suspension module under the dash that may be drawing power. Also, the idea that a relay is being heard needs to be looked considered.

Do this 3rd --- I attached a pic of the module. With the battery disconnected, unplug the suspension module and then do the test. The air suspension control module is mounted to the lower left side of the dash above the parking brake. Make sure the battery is disconnected before disconnecting or reconnecting the module.

Do this 1st --- There should be an air ride on off switch in the rear left of the vehicle. Chances are it is hidden behind the trim. It is a toggle switch. See if that changes things.

Do this 2nd --- If you haven't already, remove the fuses in the fuse box at the right side kick panel. That is the place you would rest your right foot if you were the passenger. See pic 2 for fuses I'm referring to. I have a feeling we found the issue, and it's related to the air ride. Note that the relay for the air ride is under the hood.


Let us know.

Joe

Relay in front of washer fluid was on the right side , was that suspension relay? Also under dash I unplug both and that was air suspension control module? If so still at .44 but I started truck and charge system light is on now flashing and when I drove it , it was warning me about it every 10 secs

Did you test it with the alternator unplugged?

Roy

yep, yesterday and was still the same.44.

going to do it again tomorrow because of the warning light got today.

Keep us updated.

Roy