Open Hood Latch = Dead Battery

Team141 · 01-20-2019, 10:42 AM

I’ve scoured the internets looking for a schematic or definitive answer, but can’t seem to find any supporting data on this subject.

Question: If you leave your hood up (in the heated garage), for say a week while working on cosmetics, will the latch switch/sensor recognize that the “hood is open” and not allow the computer to go to sleep fully? Never had an issue w my battery when car sits for weeks at a time, until I left the hood open. I’ve since charged the battery and it tests fine, so the battery is not bad. I’ve also set the latch into the “latched” position, and I’ve seen no voltage drop (draw) over the past 2 days.

Just curious! Thanks in advance!

-Chad

franksredhot · 01-20-2019, 07:20 PM

I leave my hood open with a battery tender hooked up. I noticed that my battery would weaken if I don't drive for a couple of weeks. Get the Tender Jr. I picked one up for $25. For just a trickle its good enough.

Memphis SS · 01-21-2019, 01:00 AM

I leave the hood up sometimes after taking a drive, I will put the battery tender on and the tender goes into standby about the same time frame as when I leave the hood down. I don't think that it matters. It will be interesting to see feedback on this

Magnum922 · 01-21-2019, 03:24 PM

Quote:

Originally Posted by Memphis SS

I leave the hood up sometimes after taking a drive, I will put the battery tender on and the tender goes into standby about the same time frame as when I leave the hood down. I don't think that it matter. It will be interesting to see feedback on this

I do the same.

Bumbleboy92 · 01-21-2019, 08:38 PM

I had my car sitting in the garage for a week with the hood up while I was installing the RS headlights. The car died on the 7th day but I don’t think it was the hood. It did start and stay with enough juice throughout the days though

zag · 01-22-2019, 12:36 PM

Could you please post a pic where this sensor is located?

THANKS

GroundhogSS · 01-22-2019, 07:12 PM

I have heard/read that leaving the hood up is hard on the gas cylinders in the hood supports. They shouldn't be left in the extended position. Not sure it that is true. When I have the battery charger connected, I just prop the hood up a little with a spray paint can.

STEVE41 · 01-22-2019, 11:17 PM

i leave my hood open when ever i am not driving it. sometimes i don't start it for like 6 days straight and never had a problem. not even sure if leaving hood open will drain the battery or not.

Jhunsberger · 01-23-2019, 05:33 AM

Last week i switched over my battery tender to the Camaro, with the hood popped but not open. Last time i had it out a few weeks ago, it was slow to start. After 3 days the tender is in stand by mode. Doesnt really answer the questions, but just my current experience.

Team141 · 01-23-2019, 12:01 PM

Sorry for the delay, but thank you for the info. Great info out there on Transport Mode, as well as the suggestions for a Battery Tender. I’ve gone ahead and picked one up and plan to install it this weekend.

Before I install the Battery Tender, I’ll be doing a few tests, as well as a Parasitic Draw Test. I’ll be sure to focus on the Hoodlatch Switch and it’s corresponding Circuit/Fuse. The engineer side of me has my curiosity peaked. I’d be willing to bet that the switch/sensor does in fact cause issues with the car not being able to go completely asleep. Time will tell based on the mA/A Draw recorded. I’ll be sure to post my findings.

For the user that wanted to see pictures of the latch/switch location, I’ll post those as well.

Thanks!
Chad

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zag · 01-23-2019, 03:49 PM

Thanks for posting the pics. Peoples follow through is one of the things that make this forum great.

17rsvert · 01-23-2019, 05:49 PM

Quote:

Originally Posted by Team141

Before I install the Battery Tender, I’ll be doing a few tests, as well as a Parasitic Draw Test. ...

I believe the electronics go through stages of shut down and sleep, so when you check the parasitic draw, the amp draw will change over time. I don't know any details, so if you could provide some findings from your tests over time it would be greatly appreciated!

GroundhogSS · 01-23-2019, 11:39 PM

Thanks for doing these tests. Looking forward to the results.

Fatty1707 · 01-24-2019, 10:47 AM

My zl1 came with a factory charger and seems to work. I have 4 others from "battery tender" that work great for many years.

01-20-2019, 10:42 AM	#1
Team141 Drives: 2016 Camaro 2SS M6 Join Date: May 2017 Location: Danville, IN Posts: 4	Open Hood Latch = Dead Battery I’ve scoured the internets looking for a schematic or definitive answer, but can’t seem to find any supporting data on this subject. Question: If you leave your hood up (in the heated garage), for say a week while working on cosmetics, will the latch switch/sensor recognize that the “hood is open” and not allow the computer to go to sleep fully? Never had an issue w my battery when car sits for weeks at a time, until I left the hood open. I’ve since charged the battery and it tests fine, so the battery is not bad. I’ve also set the latch into the “latched” position, and I’ve seen no voltage drop (draw) over the past 2 days. Just curious! Thanks in advance! -Chad Last edited by Team141; 01-20-2019 at 12:03 PM. Reason: Changed title to describe better

01-21-2019, 01:00 AM	#3
Memphis SS Drives: 2017 SS A8 Hyper Blue/White Stripes Join Date: Jun 2010 Location: Arlington, TN. Posts: 1,874	I leave the hood up sometimes after taking a drive, I will put the battery tender on and the tender goes into standby about the same time frame as when I leave the hood down. I don't think that it matters. It will be interesting to see feedback on this __________________ *2017 Camaro 2SS Hyper Blue* *2011 Camaro 2SS* *2004 Corvette CE SOLD* Last edited by Memphis SS; 01-21-2019 at 07:50 PM.

01-22-2019, 07:12 PM	#7
GroundhogSS Drives: '17 2SS convertible'20 Yukon Denali Join Date: Nov 2011 Location: Cedar Park, Texas Posts: 2,934	I have heard/read that leaving the hood up is hard on the gas cylinders in the hood supports. They shouldn't be left in the extended position. Not sure it that is true. When I have the battery charger connected, I just prop the hood up a little with a spray paint can. __________________ Richard 2017 2SS SIM convertible, A8, NPP, MRC, 56R wheels, GM CAI, Diode Dynamics Side Markers Delivered: 08/15/2016 #TeamBeckyD Last edited by GroundhogSS; 01-23-2019 at 11:40 PM.

01-23-2019, 05:33 AM	#9
Jhunsberger Drives: 2017 Camaro 1SS M6 (SOLD) Join Date: Oct 2016 Location: 19518 Posts: 402	Last week i switched over my battery tender to the Camaro, with the hood popped but not open. Last time i had it out a few weeks ago, it was slow to start. After 3 days the tender is in stand by mode. Doesnt really answer the questions, but just my current experience. __________________ 2017 1SS M6 Hyper Blue Metallic NPP, MMR 228 Z/28 replica wheels, Front: 20 x 9, Rear 20 x 11 Stock: 416hp/427tq, 12.21 @ 116.80 Modified 02/2019: Whipple SC w/ 3.500 pulley, LT4 fueling, NW 103 TB, Roto-Fab Big Gulp, Kooks 2" jet coated, full Borla ATAK exhaust, DSS axles, Gforce driveshaft. Tuned by EFX Tuning 688hp/632tq Best 1/4 to date: 10.705 @ 131.92

01-23-2019, 11:39 PM	#13
GroundhogSS Drives: '17 2SS convertible'20 Yukon Denali Join Date: Nov 2011 Location: Cedar Park, Texas Posts: 2,934	Thanks for doing these tests. Looking forward to the results. __________________ Richard 2017 2SS SIM convertible, A8, NPP, MRC, 56R wheels, GM CAI, Diode Dynamics Side Markers Delivered: 08/15/2016 #TeamBeckyD

01-20-2019, 07:20 PM	#2
franksredhot Drives: 2016 Red Hot Camaro 1SS A8 Join Date: Jun 2016 Location: Queens, NY Posts: 114	I leave my hood open with a battery tender hooked up. I noticed that my battery would weaken if I don't drive for a couple of weeks. Get the Tender Jr. I picked one up for $25. For just a trickle its good enough.

01-21-2019, 08:38 PM	#5
Bumbleboy92 Long hauler Drives: 2022 Camaro 2SS 1LE Join Date: Mar 2017 Location: Houston, TX Posts: 1,617 View My Garage	I had my car sitting in the garage for a week with the hood up while I was installing the RS headlights. The car died on the 7th day but I don’t think it was the hood. It did start and stay with enough juice throughout the days though

01-22-2019, 12:36 PM	#6
zag Drives: 2018 camaro 2 ss Join Date: Feb 2018 Location: FL Posts: 51	Could you please post a pic where this sensor is located? THANKS

01-22-2019, 11:17 PM	#8
STEVE41 Drives: 2016 SS Join Date: Jan 2016 Location: PHOENIX Posts: 156	i leave my hood open when ever i am not driving it. sometimes i don't start it for like 6 days straight and never had a problem. not even sure if leaving hood open will drain the battery or not.

01-23-2019, 12:01 PM	#10
Team141 Drives: 2016 Camaro 2SS M6 Join Date: May 2017 Location: Danville, IN Posts: 4	Sorry for the delay, but thank you for the info. Great info out there on Transport Mode, as well as the suggestions for a Battery Tender. I’ve gone ahead and picked one up and plan to install it this weekend. Before I install the Battery Tender, I’ll be doing a few tests, as well as a Parasitic Draw Test. I’ll be sure to focus on the Hoodlatch Switch and it’s corresponding Circuit/Fuse. The engineer side of me has my curiosity peaked. I’d be willing to bet that the switch/sensor does in fact cause issues with the car not being able to go completely asleep. Time will tell based on the mA/A Draw recorded. I’ll be sure to post my findings. For the user that wanted to see pictures of the latch/switch location, I’ll post those as well. Thanks! Chad

01-23-2019, 03:49 PM	#11
zag Drives: 2018 camaro 2 ss Join Date: Feb 2018 Location: FL Posts: 51	Thanks for posting the pics. Peoples follow through is one of the things that make this forum great.

01-24-2019, 10:47 AM	#14
Fatty1707 Drives: 2019 ZL1 A10 Join Date: Jan 2019 Location: Naples, FL Posts: 100	My zl1 came with a factory charger and seems to work. I have 4 others from "battery tender" that work great for many years.

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