Disconnect the brake switch connector C1.

Do the lamps remain lit?

--

Go to Step  2

Go to Step  3

Remove the CKT 20 shorting bar from splice pack S301.

Do any of the stop lamps remain lit?

--

Go to Step  4

Go to Step  5

1. Inspect the adjustment of the brake switch.
2. If the adjustment is OK, replace the stoplamp switch. Refer to Stop Lamp Switch Replacement in Hydraulic Brakes.

Is the repair complete?

--

Go to Exterior Lights System Check

--

Repair the short to B+ in CKT 20 between splice pack S301 and the lit lamp. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--

Connect a test lamp between terminal B of the brake switch connector C1 and ground.

Does the test lamp light?

--

Go to Step  6

Go to Step  7

Repair the short to B+ in CKT 20 between splice pack S301 and the brake switch. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--

1. Disconnect the right IP wiring harness junction block connector C3.
2. Connect a test lamp between terminal A2 of the right IP wiring harness junction block connector C3 and ground.

Does the test lamp light?

--

Go to Step  8

Go to Step  9

Repair the short to B+ in CKT 20 between splice pack S301 and the right IP wiring harness junction block. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--

1. Disconnect the right IP junction block connector C2.
2. Connect a test lamp between terminal A11 of the right IP junction block connector C2 and ground.

Does the test lamp light?

--

Go to Step  10

Go to Step  11

1. Disconnect the underhood junction block connector C3.
2. Connect a test lamp between the terminal F12 of the underhood junction block connector C3 and ground.

Does the test lamp light?

--

Go to Step  12

Go to Step  13

Replace the right IP junction block. Refer to Relay/Fuse Center Replacement in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--

Repair the short to B+ in CKT 20 between the right IP junction block and the underhood junction block. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--

1. Disconnect the underhood junction block connector C1.
2. Connect a test lamp between terminal A12 of the underhood junction block connector C1 and ground.

Does the test lamp light?

--

Go to Step  14

Go to Step  15

1. Disconnect the EBCM connector.
2. Connect a test lamp between terminal 16 of the EBCM connector and ground.

Does the test lamp light?

--

Go to Step  16

Go to Step  17

1. Disconnect the underhood junction block connector C2.
2. Connect a test lamp between terminal B12 of the underhood junction block connector C2 and ground.

Does the test lamp light?

--

Go to Step  18

Go to Step  19

Repair the short to B+ in CKT 20 between the underhood junction block and the EBCM. Refer Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--

Replace the electronic brake control module (EBCM). Refer to Electronic Brake Control Module Replacement in Antilock Brake System.

Is the repair complete?

--

Go to Exterior Lights System Check

--

1. Disconnect the cruise control module connector.
2. Connect a test lamp between terminal G of the cruise control module connector and ground.

Does the test lamp light?

--

Go to Step  20

Go to Step  21

Replace the underhood junction block. Refer to Relay/Fuse Center Replacement in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--

Repair the short to B+ in CKT 20 between the underhood junction block and the cruise control module. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--

Replace the cruise control module. Refer to Cruise Control Module Replacement in Cruise Control.

Is the repair complete?

--

Go to Exterior Lights System Check

--