I also have an '04 and connect right to the battery top posts
Battery Minder hookup
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5th Gear
Joined: Jun 2006
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Battery Minder hookup
This is my first winter with my 04 C5. As the weather here in MA is nasty, I'm storing her for the next few months. Following some suggestions from the forum I bought a battey minder. I have the original AC Delco battery and hope I can get some help on hooking the tender up. 1. Is the ground on the AC Delco battery attached to the postive or negative post? 2. the instructions say to attach the 2ed minder lead clamp to the block, but the lead won't reach, any other suggested points to attach the second lead? Any advice would be really appreciated. Thanks in advance.
Melting Slicks
Joined: Aug 2006
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From: canada
the battery in the C5 is a negative grounded battery.
my instruction manual for my 'battery float charger and maintainer" says :
connect the positive cable to the positive terminal on the battery.
BUT, connect the negative cable to the chassis somewhere.
thats just mine tho....
my instruction manual for my 'battery float charger and maintainer" says :
connect the positive cable to the positive terminal on the battery.
BUT, connect the negative cable to the chassis somewhere.
thats just mine tho....
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I had a really old MG once that had positive Earth. I don't think there are any of them out there any more are there?
Negative earth, ground is the black.
I hook my tender up at the battery.
Negative earth, ground is the black.
I hook my tender up at the battery.
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Safety Car
Joined: Jan 2001
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From: Boise ID
Hooking the negative to block or frame the final connection – A manufactures way of protecting their butt in case sparks erupt and the battery blows itself on you. Not so much anymore with today’s batteries. 
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From: monroeville pa
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Melting Slicks
Joined: Aug 2006
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From: canada
thanks for that input....i was wondering why i had to hook it up that way !!
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