Horns on at all times
Step
| Action
| Value(s)
| Yes
| No
|
1
| Were
you sent here from the Horns Diagnostic System Check?
| --
|
Go to Step
2
| Go to
Diagnostic System Check - Horns
|
2
|
- Disconnect the negative battery cable.
- Disconnect the BCM Connector C1.
- Measure the resistance between the relay side of the connector
C1 terminal B10 and a good ground.
Is the resistance within the specified range?
| Approx. 0ohms
|
Go to Step 3
|
Go to Step 5
|
3
|
- Disconnect the connector C221.
- Measure the resistance between the relay side of the BCM connector
C1 terminal B10 and a good ground.
Is the resistance within the specified range?
| Approx. 0ohms
|
Go to Step 4
|
Go to Step 9
|
4
|
- Disconnect the the relay connector C2.
- Measure the resistance between the relay side of the BCM connector
C1 terminal B10 and a good ground.
Is the resistance within the specified range?
| Approx. 0ohms
|
Go to Step 10
|
Go to Step 11
|
5
|
- Connect the BCM connector C1.
- Disconnect the relay connector C2.
- Measure the resistance between the BCM side of the relay connector
C2 terminal C8 and a good ground.
Is the resistance within the specified range?
| Approx. 0ohms
|
Go to Step 12
|
Go to Step 6
|
6
|
- Disconnect the Horn Connector.
- Connect the negative battery cable.
- Turn the ignitionn key to RUN position.
Are the Horns sound continuously?
| --
|
Go to Step 13
|
Go to Step 7
|
7
| Measure the voltage between the relay side
of the Horn connector terminal B and a good ground.
Is the voltage within the specified range?
| 0V
| Go to Diagnostic System Check
|
Go to Step 8
|
8
|
- Remove the fuse #11.
- Measure the voltage between the relay side of the Horn connector
terminal B and a good ground.
Is the voltage within the specified range?
| 0V
|
Go to Step 11
|
Go to Step 14
|
9
| Replace the Horn Switch Assembly.
Is the repair complete?
| --
| Go
to
Diagnostic System Check - Horns
| --
|
10
| Repair short to ground
in CKT 28.
Is the repair complete?
| --
| Go
to
Diagnostic System Check - Horns
| --
|
11
| Replace the Relay.
Is the replacement complete?
| --
| Go
to
Diagnostic System Check - Horns
| --
|
12
| Replace the BCM.
Is the replacement complete.
| --
| Go
to
Diagnostic System Check - Horns
| --
|
13
| Replace the Horn Assembly.
Is the replacement complete?
| --
| Go
to
Diagnostic System Check - Horns
| --
|
14
| Repair the short to
the power in CKT 29.
Is the repair complete?
| --
| Go
to
Diagnostic System Check - Horns
| --
|
