GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2001 🢒 Catera 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Stop Lamps Inoperative

Step

Action

Yes

No

Schematic Reference: Exterior Lights Schematics

1

Did you perform the Lighting System Diagnostic System Check?

Go to Step  2

Go to Diagnostic System Check - Lighting Systems

2
  1. Press the brake pedal.
  2. Verify that the stop lamps are inoperative.

Are the stop lamps operating properly?

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

Go to Step  3

3

Determine if all of the stop lamps are inoperative or one of the stoplamp are inoperative.

Is only one of the stop lamps inoperative?

Go to Step  7

Go to Step  4

4
  1. Disconnect the stoplamp switch connector.
  2. Probe the battery supply voltage circuit of the stop lamp switch with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

Go to Step  5

Go to Step  8

5

Connect a fused jumper between the battery supply voltage circuit of the stop lamp switch and the brake lamp supply voltage circuit of the stoplamp switch connector.

Do the stop lamps illuminate?

Go to Step  12

Go to Step  6

6
  1. Disconnect the RH stoplamp connector.
  2. Leave the fused jumper connected.
  3. Probe the brake lamp supply voltage circuit of the stop lamp with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

Go to Step  10

Go to Step  9

7

Test for an open or high resistance in the inoperative lamp supply voltage or ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step  13

Go to Step  11

8
  1. Locate an open or a high resistance in the battery positive circuit of the stoplamp switch. Refer to Circuit Testing in Wiring Systems.
  2. Repair the open or a high resistance in the battery positive circuit of the stoplamp switch. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step  13

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9
  1. Locate an open or a high resistance in stoplamp switch signal circuit. Refer to Circuit Testing in Wiring Systems.
  2. Repair the open or a high resistance in stoplamp switch signal circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step  13

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10
  1. Locate an open or a high resistance in stoplamp ground circuit. Refer to Circuit Testing in Wiring Systems.
  2. Repair the open or a high resistance in stoplamp ground circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step  13

--

11

Replace the inoperative stoplamp. Refer to the applicable procedure:

Did you complete the repair?

Go to Step  13

--

12

Replace the stop lamp switch. Refer to Stop Lamp Switch Replacement in Hydraulic Brakes.

Did you complete the repair?

Go to Step  13

--

13
  1. Connect all connectors and components that were previously disconnected.
  2. Verify that the brake lamps operate properly.

Do the brake lamps operate properly?

System OK

Go to Step 2