GMC 1986 P-Truck Service Manual page 244

DIAGNOSIS OF THE STEERING COLUMN (CONT.)
PROBLEM
Steering Wheel
Loose Every Other
Tilt Position (Tilt
Column)
Steering Column
1. Lock shoe grooves may have burrs or
Will Not Lock In Any
Tilt Position (Tilt
2. Lock shoe spring is weak or broken.
Column)
3. Lock shoe seized on its pivot pin.
Noise When Tilting 1. Tilt spring rubbing in the housing.
The Column (Tilt 2. Tilt bumpers are worn.
Column)
Steering Wheel Fails 1. Pivot pins are bound up.
To Return To The 2. Wheel tilt spring is faulty.
Top Tilt Position 3. The turn signal switch wires are too
(Tilt Column)
Dimmer Switch Will 1. Loose connector at the dimmer switch.
Not Function 2. Improper adjustment.
3. Internally damaged or worn switch.
Turn Signal W ill Not
1. Loose switch mounting screws.
Cancel
2. Switch or anchor bosses broken.
3. Broken, missing or out of position de­
4. Uneven or incorrect cancelling cam to
Turn Signal D ifficult 1. Actuator rod loose.
To Operate
2. Yoke broken or distorted.
3. Loose or misplaced springs.
4. Foreign parts and/or materials.
5. Switch mounted loosely.
Turn Signal W ill Not 1. Broken lane change pressure pad or
Indicate Lane
Change 2. Broken, missing or misplaced lane
3. Jammed base or wires.
POSSIBLE CAUSE
Loose fit between the lock shoe and
pivot pin.
dirt.
tight.
tent, return or cancelling spring.
cancelling spring interference.
spring hanger.
change spring.
STEERING COLUMN 3B4-5
CORRECTION
Replace both.
1. Replace lock shoes and clean the
grooves.
2. Replace the spring.
3. Replace both lock shoes.
1. Lubricate.
2. Replace the tilt bumpers.
1. Replace the pivot pins.
2. Replace the spring.
3. Reposition the wires.
1. Tighten or replace.
2. Readjust.
3. Replace.
1. Tighten screws to 2.8 N m (25 in.
lbs.).
2. Replace the switch.
3. Reposition or replace the springs as
required.
4. Adjust the switch position.
• If the interference is correct and
switch will still not cancel, replace
the switch.
• If the interference cannot be cor­
rected by the switch adjustment,
replace the cancelling cam.
1. Tighten mounting screw to 1.4 N m
(12 in. lbs.).
2. Replace the switch.
3. Reposition or replace the springs.
4. Remove the foreign parts and/or ma­
terial.
5. Tighten mounting screws to 2.8 (25
in. lbs.).
1. Replace the switch.
2. Replace or reposition as required.
3. Loosen mounting screws, reposition
base or wires and tighten the screws
to 2.8 N m (25 in. lbs.).