B2336

B2336-HORN CONTROL CIRCUIT LOW - FCM





For a complete wiring diagram Refer to Diagrams/Electrical.

- When Monitored:

Continuously

- Set Condition:

When the Front Control Module detects a shorted low condition on the Horn Relay Control circuit this DTC will set.





Diagnostic Test

1.TEST FOR INTERMITTENT CONDITION

With the scan tool, record and erase DTC's

Operate the Horn Switch several times.

Cycle the ignition from on to off 3 times and leave on.

With the scan tool, read DTC's.

Does the scan tool display B2336 - HORN CONTROL CIRCUIT LOW?

Yes

- Go To 2

No

- The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

2.HORN FUSE

Using a 12-volt test light connected to ground, check the Horn fuse.

Does the test light illuminate and was the fuse OK?

No

- Replace the horn fuse if open and check for a short to ground on the Horn Relay Output circuit or correct the open B(+) circuit to the fuse.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

Yes

- Go To 3

3.OPEN (A905) FUSED B(+) TO RELAY





Remove the Horn Relay from the PDC.

Using a 12-volt test light connected to ground, check the Fused B(+) circuit at the relay connector.

Does the test light illuminate?

No

- Replace the Power Distribution Center.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

Yes

- Go To 4

4.HORN RELAY

Install a known good relay in place of the Horn Relay.

With the scan tool erase DTC's

Operate the Horn Switch several times.

Cycle the ignition from on to off 3 times and leave on.

With the scan tool, read DTC's.

Does the scan tool display B2336 - HORN CONTROL CIRCUIT LOW?

No

- Replace the original Horn Relay.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

Yes

- Go To 5

5.(X4) HORN RELAY CONTROL SHORTED





Remove the Horn Relay.

Disconnect the Front Control Module from the PDC 49 - way connector.

Measure the resistance between ground and the (X4) Horn Relay Control circuit at the relay.

Is the resistance below 1000.0 ohms?

Yes

- Replace the Power Distribution Center.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Replace the Front Control Module.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test