GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2001 🢒 Catera 🢒 Body and Accessories 🢒 Theft Deterrent 🢒 Park 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. Turn the ignition switch ON.
  2. Turn the headlamp switch to the PARK position.
  3. Verify that the park lamps are inoperative.

Are all the park lamps operating properly?

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

Go to Step 3

3

Determine which park lamps are inoperative.

Are all the park lamps inoperative?

Go to Step 4

Go to Step 9

4
  1. Use the scan tool in order to turn on the park lamps.
  2. Select PARK LAMPS from the Light Test Menu under Special Functions on the scan tool.
  3. With the ignition on, press the ON button and the OFF button on the scan tool in order to turn the park lamps on and off.
  4. Monitor the scan tool while pressing the ON and OFF buttons. The scan tool can tell you the status of the BCM when either the ON or OFF button has been pressed.

Do the park lamps turn ON when commanded by the BCM?

Go to Step 7

Go to Step 5

5

Test the switch side feed of the park lamp relay for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 28

Go to Step 6

6

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

Did you find and correct the condition?

Go to Step 28

Go to Step 25

7

Test the park lamp On/Off circuit for an open or high resistance or short to B+ . Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 28

Go to Step 8

8

Test the headlamp switch ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 28

Go to Step 26

9

Is only one of the park lamps inoperative?

Go to Step 10

Go to Step 12

10

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

Did you find and correct the condition?

Go to Step 28

Go to Step 11

11

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

Did you find and correct the condition?

Go to Step 28

Go to Step 18

12

Are both inside taillamps inoperative?

Go to Step 13

Go to Step 15

13

Inspect the CLAMP 58 fuse for an open.

Is the CLAMP 58 fuse open?

Go to Step 23

Go to Step 14

14

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

Did you find and correct the condition?

Go to Step 28

Go to Step 22

15

Is the LH front park lamp and LH outside taillamp inoperative?

Go to Step 16

Go to Step 17

16

Inspect the PRK LP LH fuse for an open.

Is the PRK LP LH fuse open?

Go to Step 21

Go to Step 20

17
  1. If the RH front park lamp and RH taillamp inoperative?
  2. Inspect the PRK LP RH fuse for an open.

Is the PRK LP RH fuse open?

Go to Step 19

Go to Step 24

18

Test for a poor connection at the inoperative park lamp. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 28

Go to Step 27

19

Locate and repair a short to ground in the following circuits. Refer to Circuit Testing and Wiring Repairs in Wiring Systems:

    • The RH front park lamp rear license lamp supply voltage circuit
    • The RH outside taillamp supply voltage circuit
    • The RH parklamp supply voltage circuit

Did you complete the repair?

Go to Step 28

--

20

Repair an open or high resistance in the LH park lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 28

--

21

Locate and repair a short to ground in the following circuits. Refer to Circuit Testing and Wiring Repairs in Wiring Systems:

    • The LH front park lamp rear license lamp supply voltage circuit
    • The LH outside taillamp supply voltage circuit
    • The LH parklamp supply voltage circuit

Did you complete the repair?

Go to Step 28

--

22

Repair the open or high resistance in the inside taillamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 28

--

23

Locate and repair a short to ground in the following circuits. Refer to Circuit Testing and Wiring Repairs in Wiring Systems:

    • The rear license lamps supply voltage circuit
    • The front side marker supply voltage circuit
    • The inside taillamps supply voltage circuit

Did you complete the repair?

Go to Step 28

--

24

Repair an open or high resistance in the RH park lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 28

--

25

Replace the park lamp relay K130.

Did you complete the repair?

Go to Step 28

--

26

Replace the headlamp switch. Refer to Headlamp Switch Replacement .

Did you complete the repair?

Go to Step 28

--

27

Replace the inoperative lamp. Refer to the appropriate procedure:

    • Replace the LH park/turn signal lamp. Refer to Park/Turn Signal Lamp Bulb Replacement .
    • Replace the inoperative taillamp. Refer to Tail Lamp Bulb Replacement .

Did you complete the repair?

Go to Step 28

--

28
  1. Connect all connectors and components that were previously disconnected.
  2. Verify that the park lamps operate properly.

Do the park lamps operate properly?

System OK

Go to Step 2