1969 Ski-Doo Snowmobiles Service Manual, Page 111Get this manual
c) Join the small red and black test leads togetherd) Press on the red button; adjust the scale by turning (left or right) the meter set knob for scales and 6, then release
the red button
CAPACITY TEST
a) Connect the small red test lead to the condenser central terminal and the small black test lead to the condenser housingSee Fig#7b) Press on the red button, take the reading on scale 4, then release the buttonc) Compare your reading with the specificationsStep 7: CONDENSER LEAKAGE AND SHORT TEST