- 1,764
- 2,413
- 113
- Location
- Rosamond, CA
Let's try this again..............
There are three wire making connections to the 60 amp units plus a ground (4).
Ground - strap to a bolt or ?? mechanical to engine ?? wire # 3B
High current output= 5A Larger 8 gauge
Sense (control to turn on = 568 Smaller pig-tail off of 5A wire
AC tap (signal to control box) = 2A Smaller wire with ring terminal
Wire number are the little tags at end of wire.
You will not have (should not) a battery voltage on the 5A and the 568 wire with the switch in STOP
You will have (should have) 24 Volts with switch in the RUN position.
The AC tap wire 2A is a signal to the controller (BOX) letting the box know engine is running.
Engine running a charge voltage in the mid green area of dash voltmeter. About 28.5 Volts.
These alternators have brushes that wear and a regulator that can fail. Like any other components. 60 amp set-up have been noted to fail / headache time. Remove, inspect, test, replace parts or whole as needed. $$$ OUCH.
60 amp truck have a contactor connecting the output to battery in the RUN position in the BOX.
Not meeting the above tests... time to dig-in to the alternator or wallet.
Test, check and wrench, CAMO
NO (should NOT have a voltage unless ?? Time to work it out. Here comes the old ground stories. 
There are three wire making connections to the 60 amp units plus a ground (4).
Ground - strap to a bolt or ?? mechanical to engine ?? wire # 3B
High current output= 5A Larger 8 gauge
Sense (control to turn on = 568 Smaller pig-tail off of 5A wire
AC tap (signal to control box) = 2A Smaller wire with ring terminal
Wire number are the little tags at end of wire.
You will not have (should not) a battery voltage on the 5A and the 568 wire with the switch in STOP
You will have (should have) 24 Volts with switch in the RUN position.
The AC tap wire 2A is a signal to the controller (BOX) letting the box know engine is running.
Engine running a charge voltage in the mid green area of dash voltmeter. About 28.5 Volts.
These alternators have brushes that wear and a regulator that can fail. Like any other components. 60 amp set-up have been noted to fail / headache time. Remove, inspect, test, replace parts or whole as needed. $$$ OUCH.
60 amp truck have a contactor connecting the output to battery in the RUN position in the BOX.
Not meeting the above tests... time to dig-in to the alternator or wallet.
Test, check and wrench, CAMO
NO (should NOT have a voltage unless ?? Time to work it out. Here comes the old ground stories.