14 GA or 16 GA Fusible Link?
cutting and pasting the checks.
from the '73 FSM. Slip ring to slip ring the rotor should be 3 to 4 ohms at room temperature. [/QUOTE]
Field draw test.
First make sure there isn't a short to ground. ( Measure the resistance from brush field terminal to ground. Measured through the brushes may be more than 3-4 ohms, or if one of these '60 amp' rotors maybe as low as 2 ohms. )
Then loosen the alternator enough you can turn the pulley by hand.
Using a meter that can measure a few amps, set it to the 10 amps scale and alligator clip it like this.
Be super careful not to let either clip touch ground.
[/QUOTE]
Its in the service manual but hopefully this makes it clearer.
cutting and pasting the checks.
from the '73 FSM. Slip ring to slip ring the rotor should be 3 to 4 ohms at room temperature. [/QUOTE]
Field draw test.
First make sure there isn't a short to ground. ( Measure the resistance from brush field terminal to ground. Measured through the brushes may be more than 3-4 ohms, or if one of these '60 amp' rotors maybe as low as 2 ohms. )
Then loosen the alternator enough you can turn the pulley by hand.
Using a meter that can measure a few amps, set it to the 10 amps scale and alligator clip it like this.
Be super careful not to let either clip touch ground.
Its in the service manual but hopefully this makes it clearer.
