Ford Corsar Repair Manual page 854

EXTERIOR LAMP
1
Test lamp (27W)
I
Battery SEL122E
Combination Flasher Unit Check
Before checking, ensure that bulbs meet specifications.
Connect a battery and test lamp to the combination flasher
unit, as shown. Combination flasher unit is properly func-
tioning if it blinks when power is supplied to the circuit.
Bulb Specifications