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3-8
1977 PONTIAC SERVICE MANUAL
Fig. 3-1 Checking Buzzer at Chassis Connector
-
Fig. 3-2 Checking Buzzer Circuit at Column Connector
Note 1.
3. Short or fault in signal switch wiring. Connect male
"Em and
" F
contacts of connector with jumper (Fig. 3-2).
Check buzzer switch pads with continuity meter (Fig. 3-3).
If contact is made, function is normal. If not, replace signal
switch.
NOTE: (3) If the buzzer has not yet been isolated and
repaired, connect a continuity meter (light) to the buzzer
switch probes (Fig. 3-4). Fully insert and remove the key
from the lock cylinder.
If light is on with the key in and is off with key out, the
function is normal. Retrace diagnostic steps starting at
Note 2.
If light is not on, the fault is in the lock cylinder or
buzzer switch.
4. Chips, burrs, foreign material in lock cylinder
preventing actuator tip function. Remove chips, burrs, etc.
Reassemble and re-check. See Note 3.
CAUTION: Key must be removed or cylinder
placed in RUN position before removing lock
cylinder.
Fig. 3-3 Checking Buzzer Switch
Pads
Fig. 3-4 Checking Buzzer Switch
5. Defective lock cylinder. With the lock cylinder
removed, fully insert and remove the key. The actuator tip
(Figs. 3-5 and 3-6) should extend and retract smoothly. Total
extension of tip should be .050". If not, replace lock cylinder.
Remove and clean as required. Reassemble and re-check per
Note 3.
6. Chips, foreign material in buzzer switch.
7. Damaged or broken buzzer switch.
8. Switch appears good but will not operate.
Buzzer Continues To Operate With Key In The
Lock Cylinder With The driver's Door
1. Door jamb switch on driver's side misadjusted or
inoperative.
2. Wire from signal switch to door jamb switch shorted.
NOTE: (4) This condition indicates the lock cylinder or
buzzer switch is at fault. T o verify, check for continuity
at the "E" and "F" male connector contacts with the
key removed from the lock cylinder (Fig. 3-2). If
continuity exists, the fault is in the column.
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