B-1 Check For Open Circuit

^ Remove three-pin alternator regulator connector.

^ Measure voltage at wiring harness "A" terminal, Circuit 37 (Y).

^ Is voltage at "A" terminal equal to battery voltage?

YES -- Go to B2. B-2 Check For Voltage Drop In "I" Circuit

NO -- Check fuse T (15A) in power distribution box and replace if required. If OK, service open in circuit 37 (Y).