Low Beam Headlight Switch

[Don Spithaler]

When I turn my low beam headlights on sometimes they won't come on.
The high beams will work. I put a new switch in & thought that
corrected the problem. The only thing that seems to work is to wiggle
the cannon plug then it will work for a while & then it will not work
& this is when he bus has not been moved. The plug is P20. I was
wandering if any one has a drawing to tell what the # of that wire is
from the low beam head light switch or how would be a good way to find
the bad wire?
Don Spithaler
89 SP 36'
Butler, PA