1. Disconnect battery ground cable.
2. Remove four screws securing regulator to alternator.
3. Position regulator to allow access to the buss bar
link. The buss bar link and voltage setting terminals are
located under sealant. It maybe necessary to scrape
away some of the sealant to access the buss bar link
4. To adjust the voltage setting to 27.2 volts (for hot or
desert condition), loosen screw E0 and remove screws
E1 and E2. Rotate bus bar link to E2. Reinstall screws
E1 and E2 and tighten screw E0.
5. Apply RTV sealant to fully cover buss bar link and
voltage setting terminals.
6. Install regulator to alternator with four screws.
7. Connect battery ground cable.
8. Check output voltage, it should read 27.2 volts.
To reset alternator output voltage to 28 volts, the buss
bar link should be connected between E0 and E1. The
terminal connection E0 and E3 provides an output
voltage of 28.8 volts (for arctic conditions). When
operation in hot weather or arctic conditions cease, the
alternator output voltage should be reset to its normal
28.0 volt setting.
9. Mark the output voltage setting on the alternator and
annotate the information in the vehicle log book for
This procedure resets the alternator output approximately
0.8 volts on either side of 28 volts, but will not correct for
If an overcharge condition exists, wiring to regulator is
STE/ICE-R TEST 10
1. Start test 10, Engine RPM.
2. Crank or start the engine. Displayed reading is
RPM. Engine RPM should be 850.
0-45 DC VOLTS
STE/ICE-R TEST 89
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.