Chevrolet LIGHT DUTY TRUCK (SERIES 10-35) Service Manual page 241

3B4-6 STEERING COLUMNS
IG N IT IO N SYSTEM - ELECTRICAL S Y S T E M -
W ILL NOT FU N C TIO N (CONT'D.)
Cause
D. Defective ignition switch.
E. Ignition switch not adjusted properly.
SWITCH W ILL NOT ACTUATE M EC H AN IC A LLY
Cause
A. Defective ignition switch.
SWITCH CAN NOT
Cause
A. Switch actuator rod deformed.
B. Sector to rack engaged in wrong tooth (tilt).
NOISE IN COLUMN
Cause
A. Coupling bolts loose.
B. Column not correctly aligned.
C. Coupling pulled apart.
D. Sheared intermediate shaft plastic joint.
E. Horn contact ring not lubricated.
F. Lack of grease on bearings or bearing surfaces.
G. Lower shaft bearing tight or frozen.
H. Upper shaft tight or frozen.
I. Shaft lock plate cover loose.
J. Lock plate snap ring not seated.
K. Defective buzzer dog cam on lock cylinder.
L. One click when in " off-lock" position and the steering
wheel is moved.
L IG H T T R U CK SER V IC E MANUAL
BE SET CORRECTLY
Fig. 3 B 4 - 5 - - A u t o m a t i c T r a n s m is s io n C o lu m n D ia g n o s is C h a r t C
Solution
D. Replace ignition switch.
E. Readjust ignition switch.
Solution
A. Replace igntion switch.
Solution
A. Repair or replace switch actuator rod.
B. Engage sector to rack correctly.
Solution
A. Tighten pinch bolts to specified torque.
B. Realign column.
C. Replace coupling and realign column.
D. Replace or repair steering shaft and realign column.
E. Lubricate with lubriplate.
F. Lubricate bearings.
G. Replace bearing. Check shaft and replace if scored.
H. Replace housing assembly.
I. Tighten three screws or, if missing, replace.
CAUTION: Use specified screws. (15 in. lbs.)
J. Replace snap ring. Check for proper seating in groove.
K. Replace lock cylinder.
L. Normal condition - lock bolt is seating.