Horns Inoperative. Chevrolet Metro 1999

For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---

1

1. Remove the horn relay.
2. Use a test lamp in order to probe the horn relay connector from cavity 85 to ground.

Does the test lamp light?

--

Go to Step 2

Go to Step 3

2 | Use a test lamp in order to probe the horn relay connector from cavity 30 to ground. Does the test lamp light? | -- | Go to Step 4 | Go to Step 5
3 | Replace the junction block. Is the repair complete? | -- | System OK | --

4

1. Use a test lamp in order to probe the horn relay connector from cavity 86 to B+.
2. Press either horn switch.

Does the test lamp light?

--

Go to Step 9

Go to Step 6

5 | Replace the junction block. Is the repair complete? | -- | System OK | --

6

1. Use a test lamp in order to backprobe the junction block connector C3 from cavity 5 to B+.
2. Press either horn switch.

Does the test lamp light?

--

Go to Step 7

Go to Step 8

7 | Replace the junction block. Is the repair complete? | -- | System OK | --

8

1. Inspect for an open in BLK wire between the right side horn switch and the SIR contact coil.
2. If OK, replace the SIR contact coil.

Is the repair complete?

--

System OK

--

9 | Connect a fused jumper from the horn relay connector cavity 30 to cavity 87. Does the horn sound? | -- | Go to Step 11 | Go to Step 10

10

1. Remove the fused jumper from the horn relay connector.
2. Use a test lamp in order to backprobe the horn BLK wire connector to B+

Does the test lamp light?

--

Go to Step 12

Go to Step 13

11 | Replace the horn relay. Is the repair complete? | -- | System OK | --

12

1. Inspect for an open in GRN wire between the horn and the horn relay.
2. If OK, replace the horn.

Is the repair complete?

--

System OK

--

13

1. Inspect for a poor ground connection at G102.
2. If the connection is OK, repair the open in BLK wire between the horn and G102.

Is the repair complete?

--

System OK

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