Pontiac Fiero 1988 Service Manual page 1137

POWER DOOR LOCKS: A U 3
(Continued from previous page)
The Power Door
Locks do not operate
from one Door Lock
Switch
B: Door Lock Switch
Test (on suspect
D o o r L o c k
Switch)
The Power Door
Locks do not operate
from both Door Lock
Switches
C: Door Lock Relay
Assembly Test
B: Door Lock Switch
Test
A : D O O R L O C K M O T O R T E S T
Measure: VOLTAGE
At:
S U S P E C T DOOR
LOCK MOTOR
CONNECTOR
(Disconnected)
Condition:
• Door Lock Switch: UNLOCK and hold
Measure
Between
Correct
Voltage
For
Diagnosis
B (TAN) &
Ground
(see
schematic)
Battery See 1
B (TAN) &
A (GRY)
(see
schematic)
Battery See 2
• If all the voltages are correct, replace the
suspect Door Lock Motor.
1. Check the TAN (294) wire for an open
(see schematic).
2. Check the GRY (295) wire for an open
(see schematic).
B: D O O R L O C K S W I T C H T E S T
Measure: VOLTAGE
At: S U S P E C T DOOR LOCK SWITCH
CONNECTOR (Connected)
Measure
Between
Correct
Voltage
For
Diagnosis
B (ORN) &
Ground
Battery See 1
• Door Lock Switch: LOCK and hold
LT BLU
& Ground
Battery See 2
• Door Lock Switch: UNLOCK and hold
BLK &
Ground
Battery See 2
• If all the voltages are correct, check the
LT BLU (195) wire and BLK (194) wire
for an open (see schematic).
1. Check the CTSY/LID Fuse. Check the
ORN (40) and ORN/DK BLU (340) wires
for opens (see schematic).
2. Replace the suspect Door Lock Switch.
C : D O O R L O C K R E L A Y A S S E M B L Y
T E S T ( T A B L E 1)
Connect: T E S T LAMP
At:
DOOR LOCK RELAY ASSEMBLY CON-
NECTOR CI
Connect
Between
Correct
Result
For
Diagnosis
A (ORN/BLK)
& Ground
Test
Lamp
lights
Seel
• If the result is correct, proceed to Table 2.
(Continued from previous column)
1. Check the PWR ACC Circuit Breaker.
Check the ORN/BLK (60) wire for an open
(see schematic).
C : D O O R L O C K R E L A Y A S S E M B L Y
T E S T ( T A B L E 2)
Connect: T E S T LAMP
At: DOOR LOCK RELAY ASSEMBLY CON-
NECTORS
CI & C2 (Connected)
Condition:
• Door Lock Switch: LOCK and hold
Connect
Between
Correct
Result
For
Diagnosis
C2/B
(LT BLU) &
Ground
Test Lamp
lights
See 1
Cl/C
(GRY) &
Ground
Test Lamp
lights
See 3
Cl/C (GRY)
&C1/
B (TAN)
Test Lamp
lights
See 3
© Door Lock Switch: UNLOCK and hold
C2/A
(BLK) &
Ground
Test Lamp
lights
See 2
Cl/B
(TAN) &
Ground
Test Lamp
lights
See 3
Cl/C (GRY)
&C1/
B (TAN)
Test Lamp
lights
See 3
(Continued on next page)
(Continued in next column)