My '66 S has an overdrive that does not switch on but the dash light illuminates when switched. The previous owner replaced the solenoid with no success. I have not been under yet to test for power but I wanted to check for other faults first as there is no tell-tale click from underneath when switched. The wiring diagram shows an in-line fuse, but I cannot find it. Does anyone know where this fuse is in the circuit? I assumed it would be readily accessible behind the fascia but one never knows. There are a few other in-line fuses noted on the circuit diagram and I wonder where they might be, but I haven’t had a need to check yet.