Power Door Locks Inoperative. Chevrolet Evaluator 1985

Connect the door lock actuators, one at a time.
Activate a door lock switch to the LOCK and UNLOCK positions after each door lock actuator is connected.

Does the power door locks fuse open after any of the door lock actuators is connected?

Go to Step 20

Go to Step 18

Inspect for poor connections at the body control module. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 24

Go to Step 21

Inspect for poor connections at the appropriate door lock switch. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 24

Go to Step 22

Inspect for poor connections at the appropriate door lock actuator. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 24

Go to Step 23

Perform the set-up procedure for the body control module. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.
Replace the body control Module. Refer to Body Control Module Replacement in Computer/Integrating System.

Did you complete the replacement?

Go to Step 24

Replace the appropriate door lock switch. Refer to Assembly, Door - Inner Front .

Did you complete the repair?

Go to Step 24

Replace the appropriate door lock. Refer to Front Side Door Lock Replacement .

Did you complete the repair?

Go to Step 24

Operate the system in order to verify the repair.

Did you find and correct the condition?

System OK

Go to Step 2

Power Door Locks Inoperative w/o Keyless Entry

Step

Action

Yes

Schematic Reference: Door Lock/Indicator Schematics

Connector End View Reference: Power Door Systems Connector End Views

Did you perform the Vehicle Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Vehicle

Verify that the power door locks are inoperative.

Do the power door locks operate normally?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring System

Go to Step 3

Are all of the power door locks inoperative from both door lock switches?

Go to Step 5

Go to Step 4

Are the power door locks inoperative from a single door lock switch?

Go to Step 6

Go to Step 7

Install a scan tool.
Turn on the ignition, with the engine off.
With a scan tool, command the door lock On and Off.

Do the door lock actuators activate?

Go to Step 8

Go to Step 9

Test the ground circuit on the appropriate door lock switch for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 22

Go to Step 10

Test the unlock control circuit on the appropriate door lock actuator for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 22

Go to Step 11

Test the lock/unlock signal circuit for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 22

Go to Step 16

Is the ICBM (PWR) fuse open?

Go to Step 12

Go to Step 13

Test the lock/unlock signal circuit for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 22

Go to Step 17

Test the lock control circuit on the appropriate door lock actuator for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 22

Go to Step 18

Replace the ICBM (PWR) fuse.
Disconnect all of the door lock actuators.
Activate a door lock switch to the LOCK and UNLOCK positions.

Does the power door locks fuse open?

Go to Step 14

Go to Step 15

Test the BCM ground circuit for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 22

Go to Step 16

Test the following circuits for a short to ground:

•	The unlock control circuit to the door lock actuator

•	The lock control circuit to the door lock actuator

Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 22

Go to Step 16

Connect the door lock actuators, one at a time.
Activate a door lock switch to the LOCK and UNLOCK positions after each door lock actuator is connected.

Does the power door locks fuse open after any of the door lock actuators is connected?

Go to Step 18

Go to Step 16

Inspect for poor connections at the body control module. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 22

Go to Step 19

Inspect for poor connections at the appropriate door lock switch. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 22

Go to Step 20

Inspect for poor connections at the appropriate door lock actuator. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 22

Go to Step 21

Perform the set-up procedure for the body control module. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.
Replace the body control Module. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 22

Replace the appropriate door lock switch. Refer to Assembly, Door - Inner Front .

Did you complete the repair?

Go to Step 22

Replace the appropriate door lock. Refer to Front Side Door Lock Replacement .

Did you complete the repair?

Go to Step 22

Operate the system in order to verify the repair.

Did you find and correct the condition?

System OK

Go to Step 2