GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2000 🢒 Blazer - 4WD - RHD 🢒 Body and Accessories 🢒 Instrument Panel, Gauges, and Console 🢒 Gate Ajar Indicator Inoperative

Step

Action

Value(s)

Yes

No

1

Did you review the release system operation and perform the necessary inspections?

--

Go to Step 2

Go to Symptoms

2

Verify that the TAIL GATE ALARM indicator is inoperative.

Does the gate ajar indicator operate normally?

--

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

Go to Step 3

3

Did you perform the BCM Diagnostic System Check?

--

Go to Step 4

Go to Diagnostic System Check - Body Control System in Body Control System

4
  1. Using the scan tool, select Instrument Panel Cluster.
  2. Select Data Display.
  3. Select OUTPUTS.

Does the REAR GATE/DOOR output indicate CLOSED with the lift glass open?

--

Go to Step 5

Go to Step 12

5
  1. Using the scan tool, select Body Control Module.
  2. Select Data Display.
  3. Select Data List.
  4. Select INPUT 1.

Does the REAR GATE/DOOR output indicate CLOSED with the lift glass open?

--

Go to Step 6

Go to Diagnostic System Check - Body Control System in Body Control System

6
  1. Turn the ignition switch to the RUN position.
  2. Ensure that the gate is open.
  3. Connect a digital multimeter (DMM) to ground.
  4. Backprobe the BCM connector C2 (BLU) terminal B10 (CKT 1303).

Is battery voltage present?

--

Go to Step 7

Go to Step 13

7
  1. Connect a 5A fused jumper wire to ground.
  2. Backprobe the BCM connector C2 (BLU) terminal B10 (CKT 1303).

Is the TAIL GATE ALARM indicator on the IP illuminated?

--

Go to Step 8

Go to Step 13

8
  1. Access the rear window wiper cutout and liftglass ajar jamb switch.
  2. Disconnect the rear window wiper cutout and liftglass ajar jamb switch connector.
  3. Turn the ignition switch to the RUN position.
  4. Connect a 5A fused jumper between the rear window wiper cutout and liftglass ajar jamb switch connector terminal A and terminal B.

Is the TAIL GATE ALARM indicator on the IP illuminated?

--

Go to Step 14

Go to Step 9

9

Using a 5A fused jumper wire connector the rear window wiper cutout and liftglass ajar jamb switch connector terminal A to ground.

Is the TAIL GATE ALARM indicator on the IP illuminated?

--

Go to Step 10

Go to Step 11

10

Locate and repair the open or the high resistance in CKT 1350 between the gate ajar switch terminal B and G450. Refer to Wiring Repairs in wiring systems.

Is the repair complete?

--

Go to Step 15

--

11

Locate and repair the open or the high resistance in CKT 1303 (PNK/BLK) between the rear window wiper cutout and liftglass ajar jamb switch terminal A and the BCM connector C2 terminal B10. Refer to Wiring Repairs in wiring systems.

Is the repair complete?

--

Go to Step 15

--

12

Replace the instrument cluster.

Is the repair complete?

--

Go to Step 15

--

13
  1. Replace the BCM.
  2. Reconnect all of the disconnected components.
  3. Program the BCM with the proper calibrations.
  4. Perform the Passlock™ Learn Procedure using the scan tool.
  5. Using the scan tool, clear all of the DTCs.

Is the repair complete?

--

Go to Step 15

--

14

Replace the rear window wiper cutout and liftglass ajar jamb switch.

Is the repair complete?

--

Go to Step 15

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15

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 3