Change 1 2-223
For 60 amp Prestolite alternator, go to B, page 2-204.
For 100 amp Prestolite alternator, go to C, page 2-208.
For 200 amp Prestolite alternator, go to D, page 2-212.
For 200 amp single voltage Niehoff alternator, go to E, page 2-218.
For 100 amp single voltage Niehoff alternator, continue with F.
For 100 amp dual voltage Niehoff alternator, go to F.1, page 2-224.2.
For 200 amp dual voltage Niehoff alternator, go to G, page 2-224.6.
For 400 amp dual voltage Niehoff alternator, go to H, page 2-224.10.
The regulator for this model alternator has
overvoltage protection. Any output voltage over
30.5 volts is an overvoltage.
1. Connect RED clip to the indicated test point,
BLACK clip to negative or ground.
2. Start Test 89, DC volts.
3. Displayed reading is in volts.
0-45 DC VOLTS
STE/ICE-R TEST 89
1. Start test 10, Engine RPM.
2. Crank or start the engine. Displayed reading is
RPM. Engine RPM should be 1200-1500.
STE/ICE-R TEST 10
Voltage on wire 568 signals regulator to turn on. Without
voltage, regulator can't operate. Wire 568A is connected
with wire 5A inside engine wire harness. If there is no
loose end on wire 568A, wire harness repair is required.
Output voltage of 25-30.5 is acceptable for this