Mitsubishi 380. Manual — part 228

HOW TO DIAGNOSE

GENERAL <ELECTRICAL>

00E-10

1. VOLTAGE CHECK

(1) Ground one lead wire of the test light. If a voltmeter is

used instead of the test light, ground the grounding side
lead wire.

(2) Connect the other lead wire of the test light to the power

side terminal of the switch connector. The test light
should come on or the voltmeter should indicate a
voltage.

(3) Then, connect the test light or voltmeter to the motor

connector. The test light should not come on, or the
voltmeter should indicate no voltage. When the switch is
turned ON in this state, the test light should come on, or
the voltmeter should indicate a voltage, with the motor
starting to run.

(4) The circuit illustrated here is normal. If there is any

problem, such as the motor failing to run, check voltages
beginning at the connector nearest to the motor until the
faulty part is identified.

2. SHORT-CIRCUIT CHECK

Because the fuse has blown, it is probable that there is a
short circuit. Follow the procedures below to narrow down
the short-circuit location.

STEP 1. Remove the blown fuse and connect the test light
across the fuse terminals (Circuit switch: OFF).
Q: Does the test light illuminate?

YES : Short-circuit exists between the fuse block and the

switch. Diagnose the harness between the fuse block
and the switch.

NO : Go to Step 2.

ACX00956AB

POWER SUPPLY

FUSE

SWITCH

MOTOR

(3)

ON (2)

OFF

(1)

TEST LIGHT

(OR

VOLTMETER)

ACX00957AB

POWER SUPPLY

SWITCH

OFF

ILLUMINATION

LIGHT

TEST

LIGHT

FUSE BLOCK

(REMOVE

THE FUSE)

SHORT-CIRCUIT

LOCATION

HOW TO DIAGNOSE

GENERAL <ELECTRICAL>

00E-11

STEP 2. Turn the switch ON and disconnect the
illumination light connector.
Q: Does the test light illuminate?

YES : Short-circuit exists between the switch and the

connector. Diagnose the harness between the switch
and the connector.

NO : Short-circuit exists between the connector and the

illumination light. Diagnose the harness between the
connector and the illumination light.

ACX00958 AB

POWER SUPPLY

SWITCH

ON

ILLUMINATION

LIGHT

TEST

LIGHT

FUSE BLOCK

(REMOVE

THE FUSE)

DISCONNECT

THE LOAD

SHORT-CIRCUIT

LOCATION

ACX00959 AB

POWER SUPPLY

SWITCH

ON

ILLUMINATION

LIGHT

TEST

LIGHT

FUSE BLOCK

(REMOVE

THE FUSE)

DISCONNECT

THE LOAD

SHORT-CIRCUIT

LOCATION

HOW TO DIAGNOSE

GENERAL <ELECTRICAL>

00E-12

3. CONTINUITY CHECK

(1) When the switch is in the "OFF" position and the contact

points of terminals 1 and 2 are connected, the
self-powered test light should illuminate or the ohmmeter
should read 0 ohm.

(2) When the switch is the "ON" position and the contact

points of terminals 3 and 4 are connected, the
self-powered test light should come on or the ohmmeter
should read 0 ohm.

ACX00960 AB

SELF-POWERED TEST

LIGHT (OR OHMMETER)

1 4

2 3

ON

OFF

ON

OFF

11-1

GROUP 11

ENGINE

CONTENTS

ENGINE MECHANICAL <3.8L ENGINE> . . . . . . . . . . . . . . . . . .

11A

ENGINE OVERHAUL <3.8L ENGINE>. . . . . . . . . . . . . . . . . . . .

11B

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