Turn Signal Switch Testing

Recently, I had a situation on my 68 convertible where the Left Rear tail light night marking lights would work but not the turn signal or brake light.  In my case the issue was traced to being a combination ground and short in my left light assembly.  My tail lights house Scott Drake analog sequential turn signal modification so they're a bit more complicated than factory but the debugging is

source: 1968 Mustang Convertible Restoration http://bit.ly/2YQDxs8

Engine Idle after Reassembly

Engine idle after Reassembly 
Tuning still required





source: Fox Body Mustang Restoration http://bit.ly/2DXYdpU