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For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 Safari - 4WD 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Stop Lamps Inoperative - One

Stop Lamps Inoperative - One Non VE1

Step

Action

Value(s)

Yes

No

1

Did you perform the Exterior Light System Check?

--

Go to Step 2

Go to Exterior Lights System Check

2

Is the Center High Mount Stop Lamp (CHMSL) inoperative?

--

Go to Step 4

Go to Step 3

3

Is the RH or LH stoplamp inoperative?

--

Go to 9

Go to Exterior Lights System Check

4
  1. Apply and hold the brake pedal.
  2. Disconnect the Center High Mount Stop Lamp (CHMSL).
  3. Using a test light J 7817 , probe CKT 17 (WHT) cavity A to ground.

Does the test lamp light?

--

Go to Step 5

Go to Step 6

5

Using a DMM J 39200 , test for continuity on CKT 1350 (BLK) cavity B to ground.

Is there continuity?

--

Go to Step 7

Go to Step 8

6

Repair the open in CKT 17 (WHT) between the CHMSL and S200.

Is the repair complete?

--

Go to Exterior Lights System Check

--

7

Replace the CHMSL. Refer to High Mount Stop Lamp Replacement .

Is the repair complete?

--

Go to Exterior Lights System Check

--

8

Replace the open in CKT 1350 (BLK) between the CHMSL and S319.

Is the repair complete?

--

Go to Exterior Lights System Check

--

9

Using a test light J 35616-200 , back probe CKT 17 (WHT) connector C201 cavity A1 and the turn/hazard switch to ground.

Does the test lamp light?

--

Go to Step 11

Go to Step 10

10

Repair open in CKT 17 (WHT) between turn/hazard switch and splice S200.

Is the repair complete?

--

Go to Exterior Lights System Check

--

11

Using a test light J 35616-200 , backprobe CKT 19 (DK GRN) cavity E6 and CKT 18 (YEL) cavity E7 at the turn/hazard switch to ground.

Does the test lamp light on both circuits?

--

Go to Step 13

Go to Step 12

12

Replace the turn/hazard switch. Refer to Multifunction, Turn Signal and Hazard Switch Replacement - On Vehicle .

Is the repair complete?

--

Go to Exterior Lights System Check

--

13
  1. Disconnect inoperative stoplamp.
  2. Using a test light J 35616-200 , probe CKT 19 (DK GRN) cavity A for the right side or CKT 18 (YEL) cavity A for left side to ground.

Does the test lamp light?

--

Go to Step 14

Go to Step 15

14

Using a DMM J 39200 , probe CKT 1450 (BLK) cavity G for left side to ground.

Is there continuity?

--

Go to Step 16

Go to Step 17

15

Repair open in CKT 19 (DK GRN) or CKT 18 (YEL) between the inoperative stoplamp and the turn/hazard switch.

Is the repair complete?

--

Go to Exterior Lights System Check

--

16

Replace stoplamp. Refer to Tail Lamp Replacement .

Is the repair complete?

--

Go to Exterior Lights System Check

--

17

Repair open in CKT 1450 (BLK) between the right side stoplamp to splice S403 or CKT 1350 (BLK) between the left side stoplamp to splice S319.

Is the repair complete?

--

Go to Exterior Lights System Check

--

Stop Lamps Inoperative - One VE1

Step

Action

Value(s)

Yes

No

1

Did you perform the Exterior Lights System Check?

--

Go to Step  2

Go to Exterior Lights System Check

2
  1. Apply and hold the brake pedal.
  2. Disconnect the connector and inoperative stop lamp or center high mount stop lamp (CHMSL).
  3. Using a test light J 35616-200 , probe CKT 17 (WHT) connector cavity A to ground.

Does the test lamp light?

--

Go to Step  4

Go to Step  3

3

Locate and repair open in CKT 17 (WHT) between connector and S400.

Is the repair complete?

--

Go to Exterior Lights System Check

--

4

Using a DMM J 39200 , test CKT 1350 or 1450 from the inoperative stop lamp or CHMSL to ground.

Is there continuity?

--

Go to Step  5

Go to Step  6

5

Replace the inoperative lamp. Refer to High Mount Stop Lamp Replacement Tail Lamp Replacement .

Is the repair complete?

--

Go to Exterior Lights System Check

--

6

Locate and repair open in CKT 1350 or 1450 (BLK) between the inoperative stoplamp or CHMSL and S319 or S403.

Is the repair complete?

--

Go to Exterior Lights System Check

--