Fuse 29 - current draw
Thread Starter
Pro
Joined: Aug 2014
Posts: 604
Likes: 25
Fuse 29 - current draw
I've had an issue lately with my battery being low after sitting for a few days.
Last week i left a battery tender on the battery (unhooked from the car) for 2-3 days. I hooked everything up, started the car up and drove it to work.
By that afternoon, there wasn't enough juice left to start the car.
so I started hunting the current draw. I think I narrowed it down to fuse 29 courtesy lamp. Prior to pulling that fuse, current was 88 mA. After pulling the fuse it dropped to 15mA.
How can i fix this other than leaving the fuse out? The lights aren't on, so why is it drawing current? Does that circuit have any other loads on it?
I also pulled the fuse for the tonneau cover. Not even sure why my car had a fuse in that position. But it didn't change anything on the current draw.
I also found my glove glove box light was staying on all the time. My glove box door is sagging on the right side and doesn't close the switch to turn off the light. So I removed the bulb there.
Last week i left a battery tender on the battery (unhooked from the car) for 2-3 days. I hooked everything up, started the car up and drove it to work.
By that afternoon, there wasn't enough juice left to start the car.
so I started hunting the current draw. I think I narrowed it down to fuse 29 courtesy lamp. Prior to pulling that fuse, current was 88 mA. After pulling the fuse it dropped to 15mA.
How can i fix this other than leaving the fuse out? The lights aren't on, so why is it drawing current? Does that circuit have any other loads on it?
I also pulled the fuse for the tonneau cover. Not even sure why my car had a fuse in that position. But it didn't change anything on the current draw.
I also found my glove glove box light was staying on all the time. My glove box door is sagging on the right side and doesn't close the switch to turn off the light. So I removed the bulb there.
Last edited by TX Z06 02; Nov 2, 2016 at 10:07 PM.
Thread Starter
Pro
Joined: Aug 2014
Posts: 604
Likes: 25
So it just dawned on my that the Data Link Connector is the OBDII port?
If thats the case, I leave my HP Tuners module plugged into the OBDII all the time, regardless of if I have my laptop plugged on or not. Could this be the reason this circuit doesnt ever drop out?
Will test this theory tonight as well.
If thats the case, I leave my HP Tuners module plugged into the OBDII all the time, regardless of if I have my laptop plugged on or not. Could this be the reason this circuit doesnt ever drop out?
Will test this theory tonight as well.
Last edited by TX Z06 02; Nov 3, 2016 at 03:24 PM.
Thread Starter
Pro
Joined: Aug 2014
Posts: 604
Likes: 25
It appears that unplugging the hp tuners module from the obdii has fixed the problem. It's not that it draws much current, it was only 6mA. It's that it doesn't allow the ebcm to shut down the data link, and that's what was drawing another 70 mA.
But im down to 15 mA now. So we will see if the battery stays charged.
But im down to 15 mA now. So we will see if the battery stays charged.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
OUTSTANDING job on figuring out your issue!
15ma is an outstanding reading that will provide you a LONG LONG reserve capacity on the battery.
My 02 ZO6 draws 20ma and I let it sit for 32 days and she started up just fine when I returned. Yes the battery needed to be charged but,,,,,,,,,, it still started just fine.
Bill
15ma is an outstanding reading that will provide you a LONG LONG reserve capacity on the battery.
My 02 ZO6 draws 20ma and I let it sit for 32 days and she started up just fine when I returned. Yes the battery needed to be charged but,,,,,,,,,, it still started just fine.
Bill
Thread Starter
Pro
Joined: Aug 2014
Posts: 604
Likes: 25
Thanks Bill. Its been great driving it today, started every time without the slightest drag or hesitation from lack of cranking amps.
I really think this fixed the problem.
And I have verified the 15mA on multiple occasions during this scenario when its really in sleep mode.
I agree with 8VETTE7 that removing the glove box light wasnt necessary, I was just looking for anything at that point.
I really think this fixed the problem.
And I have verified the 15mA on multiple occasions during this scenario when its really in sleep mode.
I agree with 8VETTE7 that removing the glove box light wasnt necessary, I was just looking for anything at that point.
