CRV overnight battery drain
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CRV overnight battery drain
We have a 2007 CRV (original owner) with no modifications. It’s been a very good vehicle-372,000 kms.
A few years ago we noticed you can’t leave anything on for more than a few minutes without draining the battery.
Battery was changed every 4-5 years. Very Weak start in cold weather. An Electrical System check by Honda & an independent garage stated-No issues.
I read some & got a multimeter.
CRV Tested as Follows:
-CRV off for over 1 hour, everything off, key removed, doors closed
-Battery tested to have 12.3 Volts
-With Neg clamp removed approx a 700 mA draw was measured
-Engine Compartment Fuse Box-removed all relays/ fuses 1 at a time
-Fuse 23 removed-meter read O.000
A Brief check of various systems found that only the radio wasn’t working with fuse 23 removed.
A few years ago we noticed you can’t leave anything on for more than a few minutes without draining the battery.
Battery was changed every 4-5 years. Very Weak start in cold weather. An Electrical System check by Honda & an independent garage stated-No issues.
I read some & got a multimeter.
CRV Tested as Follows:
-CRV off for over 1 hour, everything off, key removed, doors closed
-Battery tested to have 12.3 Volts
-With Neg clamp removed approx a 700 mA draw was measured
-Engine Compartment Fuse Box-removed all relays/ fuses 1 at a time
-Fuse 23 removed-meter read O.000
A Brief check of various systems found that only the radio wasn’t working with fuse 23 removed.
If you think a good mechanic is expensive, try hiring a bad one
Joined: Dec 2011
Posts: 32,017
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From: Midwest. Aiming about mid-chest
Rep Power: 519 
Re: 07 Civic overnight battery drain
-With Neg clamp removed approx a 700 mA draw was measured
Several items in the car share fuse 23 ("back up"), but completely unplugging the radio might be a check you can do
If you think a good mechanic is expensive, try hiring a bad one
Joined: Dec 2011
Posts: 32,017
Likes: 256
From: Midwest. Aiming about mid-chest
Rep Power: 519 Re: CRV overnight battery drain
Modules can 'wake up' when battery is disconnected then reconnected, so if you didn't already have your meter connected in series beforehand you could end up with a false reading.
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