GMC 1976 ZEO 6083 Maintenance Manual page 584

9- 52
STEERING
STEERING COLUMN TROUBLE DIAGNOSIS (Cont'd .)
Condition Possible Cause
Correction
Buzzer does not sound
G. Chips, burrs, foreign
G. Remove chips, burrs, etc . Reas-
with the key fully in-
material preventing actu-
semble and re-check ref. note 3.
serted in lock cylinder
ator tip function .
with the entrance door
Caution :
Key must be re-
open .
moved or cylinder in "run"
position before removing
lock cylinder .
H. Defective lock
H. With the lock cylinder out (ob-
serving caution under G), fully
insert and remove the key. The
actuator (figures 71 and 72) should
extend and retract smoothly . Total
extension of tip should be .050 in .
If not, replace lock cylinder .
I. Chips, foreign mate-
I. Remove and clean as required-re-
rial affecting buzzer
assemble and re-check per note 3.
switch operation.
J. Damaged or broken
J . Replace buzzer switch .
buzzer switch .
K . Switch appears good
K. Connect continuity meter leads
but will not make buzzer
to the buzzer switch probes . Press
switch function check.
on the actuator pad until the in-
terior points contact. (figure 73).
If contact is not made, replace
buzzer switch .
L. Buzzer switch contact L. Reset contact gap.
gap too large.
NOTE 4 : Setting the contact gap. Press a .030 wire type spark plug gap wire with
flat piece of stock on the actuator pad. (figure 74) If contact is not made adjust
switch as shown in Figure 75, until positive contact is made . (Use continuity
meter) .
With positive contact at .030, use a .025 plug gap wire beneath the flat stock
(figure 76) . No contact should occur . Adjust as shown in Figure 77 . When the
switch will make contact with the .030 wire and not with the .025, the buzzer
switch is set at the low limit .
Condition
Possible Cause
Correction
Buzzer continues to
A. Door jamb switch mis- A. Adjust or replace as required .
operate with key in the
adjusted or inoperative.
lock cylinder with the
or inoperative.
entrance door either
opened or closed and
ceases when key is re-
moved.
B. Wire from signal switch
B. If on signal switch side, replace
to door jamb switch shorted.
signal switch . If on chassis side,
find and repair-use manual .
NOTE 5 :
This condition indicates the lock cylinder or buzzer switch is at fault.
To verify, check for continuity at the "E" & "F" male connector contacts with
the key removed from the cylinder (figure 68). If continuity exists, the fault is
in the column .