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For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1998 🢒 Seville 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Headlamps Inoperative - Low Beams

Headlamps Inoperative - Low Beams Domestic, Europe, and Japan

Step

Action

Value(s)

Yes

No

1

Was the entire Headlight System Check performed?

--

Go to Step 2

Go to Headlight System Check

2
  1. Turn the headlamp switch to the ON position.
  2. Backprobe the underhood junction block connector C2 with a DMM from cavity D1 (DK GRN) to cavity D4 (PNK/WHT).

Is the voltage within the specified range?

10-15 V

Go to Step 3

Go to Step 5

3

Replace the HDLP LO BM relay. Refer to Wiring Repairs in Wiring Systems.

Do both low beam headlamps now operate properly?

--

Go to Headlight System Check

Go to Step 4

4

Replace the underhood junction block. Refer to Underhood Fuse Block Replacement in Engine Electrical.

Is the underhood junction block replacement complete?

--

Go to Headlight System Check

--

5
  1. Remove the HDLP LO BM relay from the underhood junction block.
  2. Backprobe with a DMM from the underhood junction block connector C2 cavity D4 (PNK/WHT) to the headlamp dimmer switch connector C202 cavity B9 (PNK/WHT).

Is the resistance less than the specified value?

0.5 ohms

Go to Step 6

Go to Step 8

6

Backprobe with a DMM from the underhood junction block connector C2 cavity D4 (PNK/WHT) to the headlamp dimmer switch connector C202 cavity B8 (LT BLU).

Is the resistance less than the specified value?

0.5 ohms

Go to Step 9

Go to Step 7

7

Replace the headlamp dimmer switch. Refer to Turn Signal and Multifunction Switch Assembly - Off Vehicle in Steering Wheel and Column-Tilt.

Is the headlamp dimmer switch replacement complete?

--

Go to Headlight System Check

--

8

Repair the open in CKT 1970 (PNK/WHT) between the underhood junction block and the headlamp dimmer switch. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Headlight System Check

--

9

Replace the dash integration module (DIM). Refer to Body Control Module Replacement in Body Control System.

Is the DIM replacement complete?

--

Go to Headlight System Check

--

Headlamps Inoperative - Low Beams Norway and Sweden

Step

Action

Value(s)

Yes

No

1

Was the entire Headlight System Check performed?

--

Go to Step 2

Go to Headlight System Check

2

Replace the HDLP LO BM relay. Refer to Wiring Repairs in Wiring Systems.

Do both low beam headlamps now operate properly?

--

Go to Headlight System Check

Go to Step 3

3

Replace the underhood junction block. Refer to Underhood Fuse Block Replacement in Engine Electrical.

Is the underhood junction block replacement complete?

--

Go to Headlight System Check

--