[A26B]

Originally Posted by SAHall

............ When I turn the ignition to start and push the clutch pedal down the starter does not engage, but the gauge shows a small voltage drop when the clutch switch is activating......................

The 1990 does not have a relay in the starter loop. Consequently, when you turn the ignition switch to start BEFORE depressing the clutch pedal, the full voltage arcs across the contacts in the clutch safety switch, which damages the contacts, ultimately to the point of failure. This is the reasoning behind installation of a relay in the starter circuit.

The correct way to start is to depress the clutch pedal fully BEFORE turning the ignition switch to start. This way, the contacts are engaged before the voltage is applied.

I would suggest you bypass the clutch safety switch, only as a test to verify the switch.