GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 1999 🢒 Intrigue 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Turn Signal Lamps Inoperative - Left or Right Side

Step

Action

Value(s)

Yes

No

1

Is the turn signal lamp that is inoperative a front turn signal lamp?

--

Go to Step 5

Go to Step 2

2
  1. Turn the ignition switch to the RUN position.
  2. Place the turn signal switch to the inoperative side.
  3. Using a test light, backprobe between the inoperative tail lamp harness connector terminal A and ground.

Does the test light flash?

--

Go to Step 4

Go to Step 3

3
    • If the left side is inoperative: repair a poor connection or an open in circuit 1414 between S292 and the left turn signal lamp.
    • If the right side is inoperative, repair a poor connection or an open in circuit 1415 between S291 and the right turn signal lamp.

Is the repair complete?

--

Go to Exterior Lights System Check

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4

Replace the tail/stop/turn lamp. Refer to Tail Lamp Replacement .

Is the repair complete?

--

Go to Exterior Lights System Check

--

5

Inspect the turn telltale light.

Does the turn telltale light flash for the inoperative side when the turn signal is ON?

--

Go to Step 7

Go to Step 6

6
    • If the left side is inoperative, repair a poor connection or an open in circuit 1414 between C201 terminal C and S292.
    • If the right side is inoperative, repair a poor connection in circuit 1415 between C201 terminal B and S291.

Is the repair complete?

--

Go to Exterior Lights System Check

--

7
  1. Turn the ignition switch to the RUN position.
  2. Place the turn signal switch to the inoperative side.
    3. • If the left side is inoperative, use a test light in order to backprobe between the daytime running lamp (DRL) control module harness connector C1 terminal E and ground.
    • If the right side is inoperative, use a test light in order to backprobe between the daytime running lamp (DRL) control module harness connector C1 terminal G and ground.

Does the test light flash?

--

Go to Step 9

Go to Step 8

8
    • If the left side is inoperative, repair a poor connection an open in circuit 1414 between S292 and the DRL control module harness connector C1 terminal E.
    • If the right side is inoperative, repair a poor connection or an open in circuit 1415 between S291 and the DRL control module harness connector C1 terminal G.

Is the repair complete?

--

Go to Exterior Lights System Check

--

9
  1. Turn the ignition switch to the RUN position.
  2. Place the turn signal switch to the inoperative side.
    3. • If the left side is inoperative, use a test light in order to backprobe between the DRL control module harness connector C1 terminal B and ground.
    • If the right side is inoperative, use a test light in order to backprobe between the DRL control module harness connector C1 terminal C and ground.

Does the test light flash?

--

Go to Step 11

Go to Step 10

10

Replace the DRL control module. Refer to Daytime Running Lights (DRL) Control Module Replacement .

Is the repair complete?

--

Go to Exterior Lights System Check

--

11
  1. Turn the ignition to the RUN position.
  2. Place the turn signal to the inoperative side.
    3. • If the left side is inoperative, use a test light in order to backprobe between the underhood accessory wiring junction block harness connector C2 terminal F11 to ground.
    • If the right side is inoperative, use a test light in order to backprobe between the underhood accessory wiring junction block harness connector C2 terminal F12 to ground.

Does the test light flash?

--

Go to Step 13

Go to Step 12

12
    • If the left side is inoperative, repair a poor connection or an open in circuit 14 between the DRL control module connector C1 terminal B and the underhood accessory wiring junction block connector C2 terminal F11.
    • If the right side is inoperative, repair a poor connection or an open in circuit 15 between the DRL control module connector C1 terminal C and the underhood accessory wiring junction block connector C2 terminal F12.

Is the repair complete?

--

Go to Exterior Lights System Check

--

13
  1. Turn the ignition to the RUN position.
  2. Place the turn signal to the inoperative side.
    3. • If the left side is inoperative, use a test light in order to backprobe between the underhood accessory wiring junction block harness connector C3 terminal A11 to ground.
    • If the right side is inoperative, use a test light in order to backprobe between the underhood accessory wiring junction block harness connector C3 terminal A12 to ground.

Does the test light flash?

--

Go to Step 15

Go to Step 14

14

Replace the underhood accessory wiring junction block. Refer to Accessory Wiring Junction Block Replacement in Body Front End.

Is the repair complete?

--

Go to Exterior Lights System Check

--

15
  1. Turn the ignition switch to the RUN position.
  2. Place the turn signal to the inoperative side.
  3. Using a test light, backprobe between the inoperative side headlamp harness connector terminal D and ground.

Does the test light flash?

--

Go to Step 16

Go to Step 17

16

Replace the headlamp. Refer to Headlamp Replacement .

Is the repair complete?

--

Go to Exterior Lights System Check

--

17
    • If the left side is inoperative, repair a poor connection or an open in circuit 14, between the underhood accessory wiring junction block connector C3 terminal A11 and C141 terminal D.
    • If the right side is inoperative, repair a poor connection or an open in circuit 15 between the underhood accessory wiring junction connector C3 terminal A12 and C142 terminal D.

Is the repair complete?

--

Go to Exterior Lights System Check

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