milli ohm meter query

[Toby Paddock]

Can you just run some current thru the "affected area" 
and then probe around with a volt meter looking for a 
few mV of IR drop?

 - -- -  Toby Paddock

Paul Perry

I'm doing a lot of hunting for shorts on PCBs at the moment.
Naturally i can't afford a 'proper' millohm meter (and I only
need somethng going up to say 100 millohms full scale.

Is there any way I can adapt my cheap digital multimeter for this,
with some kind of little external add-on ckt?
Accuracy isn't important.
It  has a 4 ohm scale.

paul perry melbourne australia