Battery Drain Problem

khryslerkid said:

I'd have the multimeter set to voltage first to check for a draw. Have it set to the 20 volt position. Amperage setting might be too sensitive.

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Can’t agree, symptoms indicate a draw of a couple of amps or less, an accurate current measurement is a must to pin point what to look for quickly. Much more information than a voltage drop measurement.

Guys - Think I've cracked it (with your help!) and my newly aquired multi meter.
Confirmed no problem with charging system after driving car in most conditions and voltages just fine.
Continuity checked all fuses and fuse holders.
Cleaned up all earth connections from negative side.
Found significant drain with meter when the car was standing between battery post and negative battery connector.
Don - You put me on the right track!
Car doesn't have a horn on the wheel boss after it's suspected history as track / street racer.
Car has a separate button on the dash to activate the horn which I think was fitted presumably after it was returned to the street for Hot Rod Power Tour duty.
Disassembled aftermarket old Grant steering wheel and found two ends of a broken black wire under the steering wheel hub one of which appeared to have exposed copper resting on the steering wheel housing.
Think I disturbed it while trying to resolve an issue with the indicator switch, though it appears to have been broken a long time ago.
Taped off the wire ends, and zero battery drain to earth!
So, will continue with the discipline to to use battery isolator switch when not using the car.
On to my next electrical issue which is having an always ON oil idiot light when ignition on, despite having plenty of oil pressure, and relacing sender at motor twice, but will raise a separate thread for that!
Thanks again to all of you for your help and advice, and patience with a new guy!
So much appreciated,
Limey

I contributed nothing to this thread but it does my heart good to see a member like Limey thank those that took the time to try and help him. Too often the 'thanks' is missing...