|This may sound like I'm a dummy but. How do I check for faults with an ohm |meter? |Dave
Well you should not use an ohm meter on a circuit that is energized. The voltage may blow a fuse in your meter or worse. Ohm meter is only good for non-energized circuit.
Use volt meter instead, you know how to do that. This is not an easy problem. Electrical system problems are amongst the toughest to solves sometimes. Not easy to do.
You could have a defective hi-lo beam switch, that is leaking current when it is supposed to be -off-. Maybe this is the problem, maybe not.
To check it quickly, detach the connector to the back of your left headlight. See if there is a voltage there when the light is supposed to be off. If there is a voltage there when the light is supposed to be off, there is the problem. Not enough current to light the lamp, but enough of a parasitic load to run your battery down.
What is the chance of this happening? 1 in a million. The same as for anything else being wrong. But that is the fastest/easiest way to check for hi-low beam switch without tinkering with the steering column.
You should see zero volts when lights are switched off. If you do, that is checked off the list of possible faults.
also, remove your dome light or turn it off when you are making these tests, because with your door open, of course that is going to be pulling current from the battery.
Lg