Horns inop
Step
| Action
| Value(s)
| Yes
| No
|
1
| Were you sent here from the Horns
Diagnostic System Check?
| --
|
Go to Step 2
| Go to
Horns Diagnostic System Check
|
2
|
- Remove the HORN #36 Micro Relay from the underhood electrical
center.
- Connect a DMM between ground and the battery feed terminal in
the underhood electrical center which is used for the HORN #36 Micro Relay
(battery feed for switch side of relay).
- Measure the available voltage at the battery feed terminal for
the HORN #36 Micro Relay (switch side of relay).
Is the voltage within the specified values?
| 10.0-14.0V
|
Go to Step 3
| Go to Power Distribution
|
3
|
- Connect the DMM between ground and the battery feed terminal in
the underhood electrical center which is used for the HORN #36 Micro Relay
(battery feed for the coil side of the relay).
- Measure the available voltage at the battery feed terminal for
the HORN #36 Micro Relay (coil side of relay).
Is the voltage within the specified values?
| 10.0-14.0V
|
Go to Step 4
| Go to Power Distribution
|
4
|
- Reinstall the HORN #36 Micro Relay into the underhood electrical
center.
- Remove and check the HORN Minifuse® #11.
Is the fuse open?
| --
|
Go to Step 5
|
Go to Step 6
|
5
|
- Disconnect the horn connector.
- Connect a DMM between the horn connector terminal B and ground.
- Measure CKT 29 for continuity to ground.
Is CKT 29 continuous to ground?
| --
|
Go to Step
17
|
Go to Step 9
|
6
|
- Disconnect the horn connector.
- Connect the DMM between the HORN Minifuse® #11 terminal B
and the horn connector terminal B.
- Measure CKT 29 for continuity between the HORN Minifuse® #11
terminal B and the horn connector terminal B.
Is CKT 29 continuous between these two terminals?
| --
|
Go to Step 7
|
Go to Step
14
|
7
|
- Connect the DMM between ground and the horn connector terminal
A.
- Measure CKT 150 for continuity between ground and the horn connector
terminal A.
Is CKT 150 continuous to ground?
| --
|
Go to Step
8
|
Go to Step 15
|
8
|
- Disconnect the DMM from the horn connector.
- Connect a jumper wire between the horn connector terminal A and
ground.
- Connect another jumper wire between the horn connector terminal
B and battery power.
Do the horns operate normally?
| --
|
Go to Step
10
|
Go to Step 9
|
9
| Replace the inoperative horn(s).
Is the repair complete?
| --
| Go to Horns Diagnostic System Check
| --
|
10
|
- Remove the driver's side inflator module from the steering wheel.
- Disconnect the horn brush slip ring connector inside the steering
wheel.
- Disconnect the horn ground strap pigtail from the ground terminal
inside the steering wheel.
- Connect a DMM between the horn ground terminal and ground.
- Measure CKT 150 for continuity to ground.
Is CKT 150 continuous to ground?
| --
|
Go to Step
11
|
Go to Step 15
|
11
|
- Reconnect the horn connector.
- Reinstall the HORN Minifuse® #11 into the underhood electrical
center.
- Reinstall the HORN #36 Micro Relay into the underhood electrical
center.
- Connect a jumper wire between ground and the horn brush slip ring
electrical contact feeding the horn switches from CKT 28 within the steering
wheel.
Do the horns operate normally?
| --
|
Go to Step
12
|
Go to Step 13
|
12
| Replace the Horn Switch Assembly.
Is the replacement complete?
| --
| Go to Horns Diagnostic System Check
| --
|
13
|
- Remove the jumper wire.
- Remove the HORN #36 Micro Relay from the underhood electrical
center.
- Connect a DMM between the horn brush slip ring electrical contact
for the horn switches inside the steering wheel and the CKT 28 terminal inside
the underhood electrical center feeding the HORN #36 Micro Relay.
- Measure CKT 28 for continuity between the battery feed contact
for the horn switches inside the steering wheel and the HORN #36 Micro Relay
CKT 28 terminal inside the underhood electrical center.
Is CKT 28 continuous between these two points?
| --
|
Go to Step 16
|
Go to Step
18
|
14
| Repair an open in CKT 29.
Is the repair complete?
| --
| Go to Horns Diagnostic System Check
| --
|
15
| Repair
an open in CKT 150.
Is the repair complete?
| --
| Go to Horns Diagnostic System Check
| --
|
16
| Replace
the HORN #36 Micro Relay.
Is the repair complete?
| --
| Go to Horns Diagnostic System Check
| --
|
17
| Repair
a short to ground in CKT 29.
Is the repair complete?
| --
| Go to Horns Diagnostic System Check
| --
|
18
| Repair
an open in CKT 28.
Is repair complete?
| --
| Go to Horns Diagnostic System Check
| --
|
