Mitsubishi Montero (1991+). Manual — part 64

DEFOGGER - REAR WINDOW

1991 Mitsubishi Montero

1991 ACCESSORIES & SAFETY EQUIPMENT

Chrysler Corp./Eagle/Mitsubishi Defoggers - Rear Window

Dodge; Colt, Colt Vista, Colt 200, Stealth

Eagle; Summit

Mitsubishi: Eclipse, Galant, Mirage, Montero, 3000GT

Plymouth; Colt, Colt Vista, Colt 200

DESCRIPTION & OPERATION

The rear window defogger is a heating wire grid bonded to the

inside of the window. Heat is regulated by a control switch located on

the instrument panel.

TROUBLE SHOOTING

DEFOGGER DOES NOT WORK

Check for blown fuse, poor contact, defective defogger

switch, poor connection or open wire.

INDICATOR LIGHT DOES NOT WORK

Check for burned out bulb, open wire or poor connection.

TESTING

NOTE: Testing information for all components on all vehicles is

not available from manufacturer.

DEFOGGER SWITCH TEST

NOTE: Remove window defogger switch and disconnect switch

connector for the following test.

Colt, Colt 200, Mirage & Summit

Turn defogger switch to OFF position. Check switch continuity

using ohmmeter. Continuity should be present between terminals No. 3

and 6. See Fig. 1. Turn defogger switch to ON position. Continuity

should be present between terminals No. 1 and 5, 2 and 4, and 3 and 6.

Colt Vista

Turn defogger switch to OFF position. Check switch continuity

using ohmmeter. Continuity should be present between terminals No. 3

and 6, and terminals No. 4 and 1. See Fig. 1. Turn defogger switch to

ON position. Continuity should exist between terminals No. 5 and 2, 3

and 6, and 4 and 1.

Eclipse

Turn defogger switch to OFF position. Check switch continuity

using ohmmeter. Continuity should be present between terminals No. 1

and 5, and terminals No. 2 and 6. Turn defogger switch to ON position.

Continuity should be present between terminals No. 3 and 4, 1 and 5,

and 2 and 6. See Fig. 1.

Galant

Turn defogger switch to OFF position. Check switch continuity

using ohmmeter. Continuity should be present between terminals No. 1

and 4, and terminals No. 5 and 6. Turn defogger switch to ON position.

Continuity should exist between terminals No. 3 and 2, 5 and 6, and 1

and 4. See Fig. 1.

Montero

Turn defogger switch to OFF position. Check switch continuity

using ohmmeter. Continuity should be present between terminals No. 5

and 6, and terminals No. 1 and 2. Turn defogger switch to ON position.

Continuity should exist between terminals No. 3 and 4, 5 and 6, and 1

and 2. See Fig. 1.

Stealth & 3000GT

Remove defogger switch assembly from instrument cluster

bezel. With defogger switch in OFF position, check switch continuity

using ohmmeter. Continuity should exist between terminals No. 3 and 4.

With defogger switch in ON position, continuity should exist between

terminals No. 1 and 2, 1 and 6, and 3 and 4. See Fig. 1.

Fig. 1: Identifying Defogger Switch Terminals

Courtesy of Chrysler Motors.

DEFOGGER RELAY TEST

Colt, Colt 200, Mirage & Summit

Remove defogger relay located to the right of fuse block.

Ground relay terminal No. 4, and apply battery voltage to terminal No.

2. Check relay continuity using ohmmeter. Continuity should exist

between terminals No. 1 and 3. With voltage disconnected, continuity

should not be present between terminals No. 1 and 3. Ensure continuity

is present between terminals No. 2 and 4. See Fig. 2.

Colt Vista, Eclipse, Stealth & 3000GT

Remove defogger relay located on left center of firewall.

Ground relay terminal No. 4, and apply battery voltage to relay

terminal No. 3. Check relay continuity using ohmmeter. Ensure

continuity exists between terminals No. 1 and 2. With voltage

disconnected, continuity should not exist between terminals No. 1 and

2. Continuity should exist between terminals No. 3 and 4. See Fig. 2.

Galant

Remove defogger relay located in right front corner of engine

compartment. Ground relay terminal No. 1, and apply battery voltage to

terminal No. 3. Check relay continuity using ohmmeter. Continuity

should exist between terminals No. 4 and 5. See Fig. 2. With voltage

disconnected, continuity should not exist between terminals No. 4 and

5. Ensure continuity exists between terminals No. 1 and 3. See Fig. 2.

Fig. 2: Identifying Defogger Relay Terminals

Courtesy of Chrysler Motors.

DEFOGGER TIMER TEST

Colt, Colt 200, Mirage & Summit

Remove defogger timer from junction block under left side of

instrument panel. Connect a battery and test light to defogger timer

terminals. See Fig. 3. Apply battery voltage to terminal No. 7 for 5-7

seconds. Ensure test light illuminates for approximately 10 seconds.

Reapply battery voltage to terminal No. 7. Test light should go off

when voltage is applied again.

Colt Vista

With ignition switch in ON position, apply battery voltage to

terminal No. 2 of defogger timer. Timer should operate for

approximately 11 seconds then stop. See Fig. 3.

Eclipse & Galant

Remove defogger timer from interior relay block. Connect

battery voltage and test light to timer. See Fig. 3. Ensure test light

illuminates for approximately 11 seconds when battery voltage is

applied to terminal No. 4. Reapply battery voltage to terminal No. 4

and observe test light. Test light should go off.

Fig. 3: Identifying Defogger Timer Terminals

Courtesy of Chrysler Motors.

GRID TEST

1) Start engine and operate at 2000 RPM. Ensure battery is

fully charged. Turn defogger switch to ON position. Using a voltmeter,

check voltage at center section of each grid wire. If voltage is

approximately 6 volts, grid wire is okay. If voltage is approximately

12 volts, an open is present in the negative circuit. Move probe

slowly toward the negative terminal to determine location of open

circuit.

2) If voltage is zero volt, an open is present in the

positive circuit. Move probe slowly toward the positive terminal to