"Ignoramus15109" wrote:
, Jon Elson wrote:
First, get an Ohmmeter and see if you can detect continuity from the
case (or ground prong) to either of the flat plug terminals. If so,
then you want to work on the drill until the ohmmeter reads infinity
to the same terminal. Open up the drill, and inspect the brush
holders for greasy black deposits. Cleant that off, and clean
around the commutator (carefully) for similar gunk. Check the plug
for conductance again. If that fixed it, you got off easy. If not,
check the cord, switch/speed control and anywhere else in the drill
where wires run for bare contacts and something like dirt, chips,
greasy goo that could conduct electricity. If there is nothing more
to be found, then you either have a short in the armature or field
windings. You can disconnect things to isolate the faulty part, but
other than getting a replacement part from B&D, it is not easy to
fix, unless you want to learn the intricate art of motor rewinding.

Thanks Jon. It is either a quick fix or toss to garbage. I suspect
that the cause is crud accumulated in various places.

There should be a law forbiding people from throwing away old metal-bodied
power tools.

Jon