Wiper Switch And Washer Switch Diagnosis And Testing - Jeep Cherokee 2000 Service Manual

XJ
DIAGNOSIS AND TESTING (Continued)
be continuity. If OK, replace the faulty switch. If not
OK, repair the open circuit as required.
WIPER SWITCH AND WASHER SWITCH
FRONT
Perform the diagnosis for the front wiper system
and/or washer system as described in this group
before testing the front wiper and washer switch. For
circuit descriptions and diagrams, see 8W-53 - Wip-
ers in Group 8W - Wiring Diagrams.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, REFER TO
RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
STEERING WHEEL,
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the front wiper and washer switch
from the steering column and unplug the wire har-
ness connector from the switch.
(3) Using an ohmmeter, perform the switch conti-
nuity checks at the switch terminals as shown in the
Windshield Wiper Switch and Washer Switch Conti-
nuity chart (Fig. 2).
SWITCH POSITION
OFF
LOW
HIGH
WASH
INTERMITTENT
Fig. 2 Windshield Wiper Switch and Washer Switch
Continuity
(4) If the switch fails any of the continuity checks,
replace the faulty switch. If the switch is OK, repair
GROUP 8M - PASSIVE
STEERING COLUMN,
CONTINUITY BETWEEN
PIN P2 AND PIN L
PIN P1 AND PIN L
PIN P1 AND PIN H
PIN P1 AND PIN W
CANNOT BE CHECKED
WIPER AND WASHER SYSTEMS
the wiper system and/or washer system wire harness
circuits as required.
REAR
Perform the diagnosis for the rear wiper system
and/or washer system as described in this group
before testing the rear wiper and washer switch. For
circuit descriptions and diagrams, see 8W-53 - Wip-
ers in Group 8W - Wiring Diagrams.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, REFER
RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
STEERING WHEEL,
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRE-
OR
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
(1) Remove the accessory switch bezel from the
instrument panel and unplug the rear wiper and
washer switch wire harness connector.
(2) Using an ohmmeter, check the rear wiper and
washer switch continuity at the switch terminals as
shown in the Rear Wiper Switch and Washer Switch
Continuity chart (Fig. 3).
SWITCH POSITION
OFF
WIPE
WASH
ILLUMINATION LAMP
Fig. 3 Rear Wiper Switch and Washer Switch
(3) If the switch fails any of the continuity checks,
replace the faulty switch. If the switch is OK, repair
the rear wiper system and/or washer system wire
harness circuits as required.
TO GROUP 8M -
STEERING COLUMN,
CONTINUITY BETWEEN
1 AND 4
4 AND 5
2 AND 5, 4 AND 5
1 AND 3
Continuity
8K - 7
PASSIVE
OR