TROUBLESHOOTING FAILURES WITHOUT FAULT CODES - Continued
CORRECTIVE ACTION - Continued
Connect DC voltmeter to relay field flash (KFF), pins 8(+) and 5(-) (FO-4,
Set DEAD CRANK SWITCH to NORMAL and ENGINE CONTROL switch to
MANUAL START. Engine should crank.
If +24 Vdc battery voltage is not indicated on voltmeter, check DC voltage
between relay KFF-14 (+) and 13 (-).
a. If 24 Vdc is present, replace relay KFF (WP 0041 Guide).
b. If 24 Vdc is not present, check for 24 Vdc at GSC RM-18 (+) and ground with
ENGINE CONTROL switch set to MANUAL START.
(1) If 24 Vdc is present, repair wiring between RM-18 and relay KFF-14.
(2) If 24 Vdc is not present, replace GSC (WP 0040).
Set ENGINE CONTROL switch to OFF/RESET.
Connect DC voltmeter to digital voltage regulator (DVR) pins A3-F1 (+) and
A3-F2 (-) (FO-4, sheet 3).
Set ENGINE CONTROL switch to MANUAL START. Engine should crank.
a. If +9 to +16 Vdc is not indicated on voltmeter, replace diode CRFF (WP 0041
b. If diode is good, replace 15 ohm 25W resistor on resistor assembly A7
Allow engine to start and verify generator is rotating at or near proper speed.
Measure DC generator excitation voltage at DVR pins A3-F1 (+) and A3-F2 (-).
a. If voltage is less than +9 Vdc, replace DVR (WP 0041 Guide).
b. If voltage is greater than +15 Vdc, replace generator (WP 0097).
Verify the problem has been resolved.
Generator Produces Low Voltage Under No Load Condition.
Check for DVR fault codes.
a. If DVR fault codes are present, troubleshoot DVR (WP 0010).
b. If DVR fault codes are not present, proceed to step 2.