Checking The Relays - Yamaha YFM70RY Service Manual

EAS28040

CHECKING THE RELAYS

Check each switch for continuity with the pocket
tester. If the continuity reading is incorrect, re-
place the relay.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
1. Disconnect the relay from the wire harness.
2. Connect the pocket tester (Ω × 1) and battery
(12 V) to the relay terminal as shown.
Check the relay operation.
Out of specification → Replace.
Starter relay
3
R
B
4
1. Positive battery terminal
2. Negative battery terminal
3. Positive tester probe
4. Negative tester probe
Result
Continuity
(between "3" and "4")
Relay unit (starting circuit cut-off relay)
1 2
3
Br/G L/W
L/W L/R Br L/G L/Y
1. Positive battery terminal
2. Negative battery terminal
3. Positive tester probe
4. Negative tester probe
R R
L/W Br
1 2
4
+
R/B L/B R/L
Sb B/Y Lg
ELECTRICAL COMPONENTS
Result
Continuity
(between "3" and "4")
Relay unit (fuel pump relay)
2
3
Br/G L/W
L/W L/R
1. Positive battery terminal
2. Negative battery terminal
3. Positive tester probe
4. Negative tester probe
Result
Continuity
(between "3" and "4")
Headlight relay
First step:
1
2
1. Positive tester probe
2. Negative tester probe
3. Negative tester probe
Result
Continuity
(between "1" and "2")
No continuity
(between "1" and "3")
8-65
1 4
R/B L/B R/L
Br L/G L/Y Sb B/Y Lg
3
B G Y
Y
L
+