Textron Jacobsen Super LF 1880 Fairway Mower with ROPS, Service & Repair Instructions

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ELECTRICAL SYSTEM
10E-12
VOLTAGE TEST
1. Set multimeter to 20 DC volts.
2. Connect NEG (-) lead of multimeter to a good
ground.
3. Touch the POS (+) lead of the multimeter to the
“B” terminal of alternator.
The multimeter should read battery voltage, pro-
ceed with Step 4.
No or low voltage, check battery, connections and
wiring.
4. Remove plug from back of the alternator.
5. Turn ignition switch to the RUN position.
6. Touch POS (+) lead to plug terminal of the two
wires ORG and ORG/BLK (Figure 10E-2).
The multimeter should read battery voltage, pro-
ceed with Step 5.
No or low voltage, faulty wiring, battery, or system
relay.
7. Remove the resistor and test as shown in
Section 10C. Replace if necessary.
Figure 10E-2. Circuit Voltage Test
REGULATOR TEST
1. Remove the plug from the back of the alternator
(Figure 10E-3).
Figure 10E-3. Alternator
2. Set multimeter to the continuity scale
(Figure 10E-4).
3. Touch the multimeter leads to the two terminals of
the alternator, and then switch lead positions.
The multimeter should indicate continuity in one
direction but not the other.
If continuity is not available or available in both
directions, the regulator may be faulty. Refer to
the engine manufacturer’s service manual for
detail test and repair instructions.
Figure 10E-4. Regulator Test
Alternator Plug Alternator