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My UK model 260Z has suddenly started eating batteries. Is anyone aware of a particular part of the wiring that is likely to short out and create a drain? She was fine for ages but then the battery started to fail and I had to put her on a charger every few days. Then I missed a "charge" and the battery went flat. I bought a brand new battery but the same problem happened and the new one is now junk too (I know, I know... I should have disconnected it!). The only thing I'd done before this prob appeared was to add an earth strap from the negative terminal to the bodyshell - this wouldn't be a problem surely? The alternator seems fine and charges well, so I reckon it's a short.

Due to bad weather and lack of time I've not yet started the laborious business of trying to find the short circuit. Does anyone have a pointer to a particular circuit that might be known as prone to shorting?

All help gratefully recieved!

Thanks,

TL
 

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I doubt if the ground strap has anything to do with it, but have you disconnected it to see if there is a difference? One good way to check for shorts or leakages is to connect an ammeter in series with the battery cable and see what kind of draw you have with nothing turned on. Just sitting. If there is a draw then go to the fuse box and start pulling fuses one at a time until the draw drops to zero (may have a small draw from the clock but not enough to discharge in a short time). When you find the fuse that clears the current draw, you then have the circuit, or circuits that need to be checked for frayed wires. Not likely to be anything on ignition or accessory circuits. Most likely items on BAT circuits like lights. Might possibly be an alternator or regulator. Easy way to check them is to disconnect and see if there is a current drop also. Possibly a leaking noise condensor on the altenator also. Just disconnect it to test. Make sure you don't disconnect the altenator main wire while the battery is hooked up. Just unhook bat then the alt wire then reconnect the battery and your test connections. We don't want big sparks flying do we?
 
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