Control Switch Removal And Installation; Control Switch Test; Circuit Breaker Test - Jeep 1979 CJ-5 Technical & Service Manual

3T-14 WINDSHIELD WIPERS
CONTROL SWITCH
Removal
A one-way friction spring in the control knob retains
it to control switch shaft. This one-way spring allows
knob to be installed but prevents its removal unless
spring tension is released.
(1) Disconnect battery negative cable.
(2) To remove, locate small notch at base of knob
and insert a small screwdriver at that point. Apply
pressure to release spring and pull knob from shaft.
(3) Remove slotted trim nut from front of switch.
(4) Push switch through instrument panel, dis-
connect from harness and remove.
Installation
(1) Connect switch to harness and push through
instrument panel.
(2) Install slotted trim nut on front of switch and
tighten.
(3) Align control knob and push on shaft.
(4) Connect battery negative cable.
Switch Test
(1) Check wiper switch continuity using Continuity
Light J-21008 or an ohmmeter. Continuity should exist
between terminals at various switch positions as shown
in figure 3T-11.
(2) Variable resistance between number. 4 and 5 ter-
minals of an intermittent wiper system must be checked
with an ohmmeter. This resistance controls governor
operation for intermittent wiping. If intermittent wipe
cycle is not operating, but system does operate at both
low and high speed, resistance between number 4 and 5
terminals should be checked. With switch control knob
rotated to full counterclockwise position, ohmmeter
should indicate 5600 to 8400 ohms. As control knob is
rotated in a clockwise direction, resistance should de-
crease to a minimum of 100 to 900 ohms.
(3) If continuity and resistance do not check out as
specified, switch must be replaced. Check wiring for
proper continuity if switch tests indicate proper
operation.
Circuit Breaker Test
. The circuit breaker is located in the wiper control
switch and has a rating of 7 amps.
Two separate tests are necessary to check for correct
circuit breaker operation.
Test 1
Connect switch to tester as shown in figure 3T-12. Ad-
just current draw until it equals circuit breaker rating.
Leave switch connected to tester for 10 minutes. Current
reading on ammeter should remain at rated current. If
circuit breaker opens during ten minute period, replace
wiper switch assembly.
Standard
Intermittent
Off or Park
1-2
3-4
1-2
4-5
Low Speed
1-2-3
1-2
4-5 to Case
4-5
High Speed 1-2-5
1-2-3
4-5 to Case
4-5
Intermittent
1-2
4-5 to Case
. ^-Variable Resist.
"
1-9K to
7
K
Wash 1-2
6-7
1-2
6-7
4 1 5 2 8
Fig. 3T-11 Continuity Test f i r Wtyor Switches
GREEN
Fig. 3T-12 Circuit Breaker l i s t