GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Remove the horn relay.

Do the horns continue to sound?

--

Go to Step 2

Go to Step 3

2

Repair the short to B+ in CKT 29 (DK GRN) . Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

System OK

--

3

Connect a test light from the horn relay connector cavity 86 to B+.

Did the test light illuminate?

--

Go to Step 4

Go to Step 5

4

  1. Disconnect the turn signal switch harness connector at the base of the steering column.
  2. Connect a test light from cavity G (column side of connector), to B+.

Did the test light illuminate?

--

Go to Step 6

Go to Step 7

5

Replace the horn relay.

Did you complete the repair?

--

System OK

--

6

Replace the horn switch. Refer to Horn Switch Replacement - On Vehicle in Steering Wheel and Column - Tilt.

Did you complete the repair?

--

System OK

--

7

Repair the short to ground in CKT 28 (BLK) between the horn relay connector cavity 86 and the turn signal switch connector. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

System OK

--