65 dead battery

[Ronald C.]

[Timothy B.]

Re: 65 dead battery

Ronald, I would fully charge the battery and load test it, the battery may be going bad.

[Ronald C.]

Re: 65 dead battery

it is anew restoration battery, repalced about 3 weeks ago.

[Jack H.]

Re: 65 dead battery

I always disconnect the negative battery lead when trailering etc. recently i noticed that after about 40 hours the battery is dead. this must mean that a device/gauge etc is drawing power and relying on a ground elsewhere ... but anyway to locate readily? other than measure DC amps and remove one fuse at time until it falls off? i am thinking the water temp gauge as i have seen it spike off scale from time to time but it is for a matter of seconds then returns to normal. happens with motor cold and off so i am suspect about the gauge but can’t believe it could kill the battery.

Cant put a disconnect on the positive terminal due to interference with the firewall electrical connections.

Unless I misunderstood something....if the battery is disconnected, either by removing positive cable or the negative/ground cable or both, then the battery can't be drained from some other device ("relying on ground elsewhere"). Even with just the negative cable disconnected, the device would need the negative connected to have a common ground. Ground is not ground unless it's a common ground, and the only way to achieve that is to connect the negative cable.

I suspect a faulty battery.

[Richard L.]

Re: 65 dead battery

I bought a Restoration Battery for my 69 and it was dead in one week. Although they promptly replaced it, you never know about a "new" battery.

[Ronald C.]

Re: 65 dead battery

but if a device is grounded to the frame is the path not complete? and thus disscharigning?

[Paul J.]

Re: 65 dead battery

Ronald, as Jack pointed out your OP is not clear on whether or not the battery goes dead before or after the negative cable is disconnected. If it goes dead when it is connected, then the easiest way to find the drain is pulling fuses like you mentioned. If it goes dead 40 hours after disconnecting the negative cable then it is the battery. As for a mystery ground, something has to touch the negative side of the battery to form a circuit where any ground would come into play.

Paul

[Jack H.]

Re: 65 dead battery

but if a device is grounded to the frame is the path not complete? and thus disscharigning?

Nope. Not unless the battery (negative side) is somehow connected to the frame providing a common ground as Paul mentioned above.

[Dennis O.]

Re: 65 dead battery

[QUOTE=Richard Lomax (51088);660145]I bought a Restoration Battery for my 69 and it was dead in one week. Although they promptly replaced it, you never know about a

Same thing happened to me.