Relay Tests - Jacobsen AR-3 Technical/Repair Manual

ELECTRICAL

Relay Tests

Start Relay
See Figure 4-31.
Required Tools or Equipment
Digital Multimeter, Ohmmeter, or Continuity Tester
12-Volt DC Power Source and Leads
1. Park the mower safely. (See "Park Mower Safely" on
page 1-7.)
2. Remove the start relay. (See "Start Relay" on
page 4-78.)
1
4
5
3. Connect one test lead to terminal (4).
4. Connect the other test lead to terminal (1) and check
for continuity.
Is continuity indicated?
YES Proceed to step 5.
NO The relay is faulty; replace the relay.
5. Connect one test lead to terminal (4).
6. Connect the other test lead to terminal (3).
7. Connect a 12-volt DC power source to terminals
(5 and 2).
8. Check for continuity across terminals (4 and 3).
Is continuity indicated?
YES The relay is good.
NO The relay is faulty; replace the relay.
4-62
2
3
4
Figure 4-31
Glow Plug Relay
See Figure 4-32.
Required Tools or Equipment
Digital Multimeter, Ohmmeter, or Continuity Tester
12-Volt DC Power Source and Leads
1. Park the mower safely. (See "Park Mower Safely" on
page 1-7.)
2. Remove the glow plug relay. (See "Glow Plug Relay"
on page 4-79.)
1
4
3. Connect one test lead to terminal (4).
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4. Connect the other test lead to terminal (2) and check
for continuity.
Is continuity indicated?
YES The relay is faulty; replace the relay.
NO Proceed to step 5.
5. With the test leads connected, as described in step
4, connect a 12-volt DC power source to terminals (3)
and (1).
6. Check for continuity across terminals (4 and 2).
Is continuity indicated?
YES The relay is good.
NO The relay is faulty; replace the relay.
2
3
Figure 4-32
4181384 First Edition
TN1100