16-80 ELECTRICAL SYSTEM
Junction Box
The junction box [A] has fuses [B], relays, and diodes. The relays and diodes can not be removed.
Junction• Box Fuse Circuit Inspection
•Remove the seats (see Frame chapter). Remove the junction box [A].
•Pull off the connectors [A] from the junction box [B]. |
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•Make sure all connector terminals are clean and tight, and |
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none of them have been bent. |
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Clean the dirty terminals, and straighten slightly–bent ter- |
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minals. |
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•Check conductivity of the numbered terminals with the |
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hand tester. |
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Refer to the Junction Box Internal Circuit. |
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If the tester does not read as specified, replace the junc- |
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tion box. |
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Special Tool - |
Hand Tester: 57001–1394 |
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Fuse Circuit Inspection |
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Tester |
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Tester |
Tester |
Tester |
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Connection |
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Reading (Ω) |
Connection |
Reading (Ω) |
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1 - 1A |
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0 |
1A - 8 |
∞ |
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1 - 2 |
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0 |
2 - 8 |
∞ |
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3A - 4 |
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0 |
3A - 8 |
∞ |
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6 - 5 |
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0 |
6 - 2 |
∞ |
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6 - 10 |
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0 |
6 - 3A |
∞ |
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6 - 7 |
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0 |
17 - 3A |
∞ |
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6 - 17 |
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0 |
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ELECTRICAL SYSTEM 16-81
Junction Box
Starter• Circuit/Headlight Relay Inspection
Remove the junction box (see Junction Box Fuse Circuit
•Inspection).
Check conductivity of the following numbered terminals by connecting the hand tester and one 12 V battery to the junction box as shown.
○Refer to the Junction Box Internal Circuit.
If the tester does not read as specified, replace the junction box.
Special Tool - Hand Tester: 57001–1394
Relay Circuit Inspection (with the battery disconnected)
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Tester |
Tester |
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Connection |
Reading (Ω) |
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7 - 8 |
∞ |
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Headlight |
7 - 13 |
∞ |
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Relay |
(+) (–) |
Not ∞ * |
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13 - 9 |
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9 - 11 |
∞ |
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Starter |
12 -13 |
∞ |
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(+) (–) |
∞ |
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Circuit |
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13 - 11 |
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Relay |
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(+) (–) |
Not ∞ * |
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12 - 11 |
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(*): The actual reading varies with the hand tester used. (+): Apply tester positive lead.
(–): Apply tester negative lead.
Relay Circuit Inspection (with the battery connected)
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Battery |
Tester |
Tester |
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Connection (+) (–) |
Connection |
Reading (Ω) |
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Headlight |
9 - 13 |
7 - 8 |
0 |
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Relay |
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Starter |
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(+) (–) |
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Circuit |
11 - 12 |
Not ∞ * |
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13 - 11 |
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Relay |
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(*): The actual reading varies with the hand tester used. (+): Apply tester positive lead.
(–): Apply tester negative lead.
16-82 ELECTRICAL SYSTEM
Junction Box
Diode• Circuit Inspection
•Remove the junction box.
Check conductivity of the following pairs of terminals.
Diode Circuit Inspection
Tester 13-8, 13-9, 12-11, 12-14, 15-14, 16-14 Connection
The resistance should be low in one direction and more than ten times as much in the other direction. If any diode shows low or high in both directions, the diode is defective and the junction box must be replaced.
NOTE
○The actual meter reading varies with the meter used and the individual diodes, but, generally speaking, the lower reading should be from zero to one half the scale.
Junction Box Internal Circuit
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A. Accessory Fuse 10 A |
E. Ignition Fuse 10 A |
J. Starter Circuit Relay |
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B. Fan Fuse 15 A |
F. Headlight Fuse 10 A |
K. Interlock Diodes |
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C. Turn Signal Relay Fuse |
G. Headlight Relay |
L. Taillight Fuse 10 A |
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10 A |
H. Headlight Diodes |
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D. Horn Fuse 10 A |
I. Starter Diode |
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