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Makes 🢒 GMC_Truck 🢒 1999 🢒 Savana 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Daytime Running Lamps (DRL) Headlamps Inoperative

Daytime Running Lamps (DRL) Headlamps Inoperative Domestic

Step

Action

Value(s)

Yes

No

1

Was the DRL System Check performed?

--

Go to Step 2

Go to Daytime Running Lights (DRL) System Check

2

Are the low beam headlamps inoperative?

--

Go to Step 3

Go to Step 4

3
  1. Connect a J 39200 DMM between connector C200 Cavity E13 for the LT BLU (10) pigtail wire and cavity E12 for the TAN (12) pigtail wire.
  2. Operate the headlamp dimmer switch at low beam at least twice.

Is continuity present?

--

Go to Step 6

Go to Step 7

4

Are the high beam headlamps inoperative?

--

Go to Step 5

--

5
  1. Disconnect C200 at the steering column.
  2. Connect a J 39200 DMM between connector C200 cavity E13 for the LT BLU (10) pigtail wire and cavity E11 for the LT GRN (11) pigtail wire.
  3. Operate the headlamp dimmer switch at high beam at least twice.

Is continuity present?

--

Go to Step 8

Go to Step 9

6
  1. Reconnect C200 at the steering column.
  2. Remove the daytime running lamp relay from the IP relay center.
  3. Connect an unpowered test lamp between the IP relay center cavity C2-Exp and ground.
  4. Place the headlamp switch in the headlamp position and the headlamp dimmer switch in LO.

Does the test lamp light?

--

Go to Step 10

Go to Step 11

7

Test for an open in the TAN (12) pigtail wire in the steering column.

Is the wire open?

--

Go to Step 12

Go to Step 13

8

Repair the open in the LT GRN (11) wire between connector C200, cavity E11 and splice S144.

Is the repair complete?

--

Go to Daytime Running Lights (DRL) System Check

--

9

Test for an open in the LT GRN (11) pigtail wire in the steering column.

Is the wire open?

--

Go to Step 14

Go to Step 13

10

Replace the daytime running lamp relay.

Is the repair complete?

--

Go to Daytime Running Lights (DRL) System Check

--

11

Repair the open in the PPL (359) wire between the IP relay center cavity C2 and C200 connector cavity E12.

Is the repair complete?

--

Go to Daytime Running Lights (DRL) System Check

--

12

Repair the open in the TAN (12) pigtail wire in the steering column.

Is the repair complete?

--

Go to Daytime Running Lights (DRL) System Check

--

13

Replace the headlamp dimmer switch.

Is the repair complete?

--

Go to Daytime Running Lights (DRL) System Check

--

14

Repair the open in the LT GRN (11) pigtail wire in the steering column.

Is the repair complete?

--

Go to Daytime Running Lights (DRL) System Check

--

Daytime Running Lamps (DRL) Headlamps Inoperative Export

Step

Action

Value(s)

Yes

No

1

Did you perform the DRL System Check?

--

Go to Step 2

Go to Keyless Entry Schematic References

2

Are the low beam headlamps inoperative?

--

Go to Step 3

Go to Step 4

3
  1. Connect a J 39200 DMM between connector C200 Cavity E13 for the LT BLU (10) pigtail wire and cavity E12 for the TAN (12) pigtail wire.
  2. Operate the headlamp dimmer switch at low beam at least twice.

Is continuity present?

--

Go to Step 6

Go to Step 7

4

Are the high beam headlamps inoperative?

--

Go to Step 5

--

5
  1. Disconnect C200 at the steering column.
  2. Connect a J 39200 DMM between connector C200 cavity E13 for the LT BLU (10) pigtail wire and cavity E11 for the LT GRN (11) pigtail wire.
  3. Operate the headlamp dimmer switch at high beam at least twice.

Is continuity present?

--

Go to Step 8

Go to Step 9

6
  1. Reconnect C200 at the steering column.
  2. Remove the daytime running lamp relay from the IP relay center.
  3. Connect an unpowered test lamp between the IP relay center cavity C2 and ground.
  4. Place the headlamp switch in the headlamp position and the headlamp dimmer switch in LO.

Does the test lamp light?

--

Go to Step 10

Go to Step 11

7

Test for an open in the TAN (12) pigtail wire in the steering column.

Is the wire open?

--

Go to Step 12

Go to Step 13

8

Repair the open in the LT GRN (11) wire between connector C200, cavity E11 and the underhood fuse relay center cavity H3.

Is the repair complete?

--

Go to Keyless Entry Schematic References

--

9

Test for an open in the LT GRN (11) pigtail wire in the steering column.

Is the wire open?

--

Go to Step 14

Go to Step 13

10

Replace the daytime running lamp relay.

Is the repair complete?

--

Go to Keyless Entry Schematic References

--

11

Repair the open in the PPL (359) wire between the IP relay center cavity C2 and C200 connector cavity E12.

Is the repair complete?

--

Go to Keyless Entry Schematic References

--

12

Repair the open in the TAN (12) pigtail wire in the steering column.

Is the repair complete?

--

Go to Keyless Entry Schematic References

--

13

Replace the headlamp dimmer switch.

Is the repair complete?

--

Go to Keyless Entry Schematic References

--

14

Repair the open in the LT GRN (11) pigtail wire in the stering column.

Is the repair complete?

--

Go to Keyless Entry Schematic References

--