All Models
Ford, Mercury and Meteor have an 81/4 ampere circuit breaker in fuse panel. Mustang, Fairmont, Zephyr, Monarch, Granada and Versailles have a 6 ampere circuit breaker in the wiper control switch. All rotary pin terminal switches have a circuit breaker rating of 81/4 amperes. Slide switches have no circuit breakers.
Before connecting leads, short them together and adjust current draw so that it equals circuit breaker rating. Connect meter as shown. Leave breaker connected to meter for ten minutes. Current reading should remain at rated current. If circuit breaker opens during the ten minutes it should be replaced.
Now adjust current draw to twice the rated current. The current reading on the ammeter should drop to zero within 30 seconds. If it takes longer than 30 seconds for breaker to open, it should be replaced.