Knocking sound from front end while charging battery?
Thread Starter
Intermediate
Joined: Dec 2000
Posts: 41
Likes: 0
From: Burnaby, BC, Canada
Knocking sound from front end while charging battery?
I was going to take the car out of storage this weekend so I decided to check the car out. The battery was dead so I hooked up the charger and left it for a few hours. When I came back, there was a ticking/knocking sound coming from somewhere on the front of the car. I'd say around 5 ticks per second. I quickly disconnected the battery so I couldn't pinpoint where the sound was coming from. It's an '01 C5 if that makes any difference. Any ideas?
Melting Slicks
Joined: Jun 2001
Posts: 2,565
Likes: 2
From: Chicagoland Illinois
Re: Knocking sound from front end while charging battery? (c5davey)
Was it the ticking sound that a TOTALLY dead battery makes when it only gets a short re-charge??? If this might be it...just charge it some more...The AGM batteries are not supposed to lose their charge if they are disconnected...if it was still connected, they can lose their charge in a short time. I hope this helps. :chevy :seeya
Racer
Joined: Feb 2001
Posts: 468
Likes: 0
From: Lawrenceville GA
Re: Knocking sound from front end while charging battery? (c5davey)
What you heard was probably some relays opening and closing as they received some stray current. I've not had a problem with the battery on my Z, but my father had his die last winter (2K coupe). He said he heard some of the same noises you did when he was charging. Given the number of computers on these cars, for peace of mind, I'd disconnect the battery before charging.
Drifting
Joined: Dec 1999
Posts: 1,683
Likes: 23
From: Newark CA
Re: Knocking sound from front end while charging battery?
I heard the same sound last week. Didn't drive the car for a month and the battery went down. When I hit the unlock button on the fob, the ticking started. Somewhere near the battery. A few minutes after hooking up the charger the noise stopped.
Thread Starter
Intermediate
Joined: Dec 2000
Posts: 41
Likes: 0
From: Burnaby, BC, Canada
Re: Knocking sound from front end while charging battery? (c5davey)
Thanks guys. All is fine after a full charge. Just a few more ticks as I connected the battery. I think I'l invest in a battery tender for next winter.
Instructor
Joined: Jan 2000
Posts: 189
Likes: 0
From: Santa Fe, NM
Re: Knocking sound from front end while charging battery? (c5davey)
A Battery Tender is the only way to go if you don't drive the car alot. I keep one on all the time and I drive my car every week -- batterys last a lot longer if kept charged. Sears has something similar to a Battery Tender for about $25, thats what I use. Its also not a bad idea to get a Optima battery, they won't leak on the computer thats under the battery. :cheers:
