GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1997 🢒 Corvette 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Stop Lamps Inoperative - Center High Mounted Stop Lamp (CHMSL) Operative (Domestic and Canadian)

Stoplamps Inoperative/CHMSL operates normally (Domestic and Canada)

Step

Action

Value(s)

Yes

No

1

Were you sent here from the Exterior Lights Diagnostic System Check?

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Go to Step 2

Go to Exterior Lights Diagnostic System Check

2
  1. Disconnect the hazard warning switch connector.
  2. Connect a DMM between the hazard warning switch connector terminal K and ground.
  3. Depress the brake pedal.
  4. Measure the available voltage at the connector.

Is the measured voltage within the specified values?

10.0-14.0V

Go to Step 4

Go to Step 3

3

Repair a poor connection or an open in CKT 17 between the hazard warning switch terminal K and the stoplamp switch connector.

Is the repair complete?

--

Go to Exterior Lights Diagnostic System Check

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4
  1. Connect a fused jumper between the hazard warning switch terminal K and terminal J.
  2. Connect a DMM between the connector C209 terminal A and ground.
  3. Depress the brake pedal.
  4. Measure the available voltage at the connector.

Is the measured voltage within the specified values?

10.0-14.0V

Go to Step 6

Go to Step 5

5
  1. Connect a DMM between connector C209 terminal A and the hazard warning switch terminal J.
  2. Measure CKT 27 for continuity between these two connectors.

Is CKT 27 continuous between these two connectors?

--

Go to Step 11

Go to Step 12

6
  1. Using a DMM, backprobe between the connector C209 terminal C and ground.
  2. Depress the brake pedal.
  3. Measure the available voltage at the connector.

Is the measured voltage within the specified values?

10.0-14.0V

Go to Step 8

Go to Step 7

7

Replace the turn signal switch.

Is the repair complete?

--

Go to Exterior Lights Diagnostic System Check

--

8
  1. Disconnect the CHMSL connector.
  2. Connect a DMM between the CHMSL connector terminal A and terminal B.
  3. Depress the brake pedal.
  4. Measure the available voltage at the connector.

Is the measured voltage within the specified values?

10.0-14.0V

Go to Step 9

Go to Step 10

9

Repair an open in CKTs 18/19 between C148 and the turn signal switch.

Is the repair complete?

--

Go to Exterior Lights Diagnostic System Check

--

10

Repair an open in CKTs 18/19 between C148 and the LH/RH stoplamp light bulbs.

Is the repair complete?

--

Go to Exterior Lights Diagnostic System Check

--

11

Replace the hazard warning switch.

Is the repair complete?

--

Go to Exterior Lights Diagnostic System Check

--

12

Repair an open in CKT 27.

Is the repair complete?

--

Go to Exterior Lights Diagnostic System Check

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