Horns Inoperative. Opel Sintra 1999

For 1990-2009 cars

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

Important: Use the J 35616 whenever a diagnostic procedure requires you to test or probe a terminal. Use the J 35616 for the following reasons:

• | In order to prevent damage to the terminal

• | In order to indicate whether the contact tension is sufficient

If the contact tension seems incorrect, refer to Checking Terminal Contact in Troubleshooting Procedures.

1 | Test the vehicle for UA6 theft deterrent option. Is the vehicle equipped with UA6 system? | -- | Go to Step 2 | Go to Step 3
2 | Test the vehicle for body control module DTCs. Refer to Diagnostic System Check - Body Control System in Body Control Systems. Are any DTCs present? | -- | Go to the appropriate DTC table in Body Control Systems | Go to Step 3

3

1. Remove the horn relay.
2. Connect a test lamp between horn relay terminal 86 and ground.

Does the test lamp light?

--

Go to Step 4

Go to Step 5

4 | Connect a test lamp between horn relay terminal 30 and ground. Does the test lamp light? | -- | Go to Step 6 | Go to Step 5

5

1. Test for a poor connection at the underhood accessory wiring junction block.
2. Test for a poor connection at horn relay terminals 86/30.
3. If the connection is OK, replace the underhood accessory wiring junction block. Relay/Fuse Center Replacement

Is the symptom still present?

--

System OK

--

6

1. Connect a test lamp between horn relay terminal 86 and terminal 85.
2. Press the horn switch while observing the test lamp.

Does the test lamp light?

--

Go to Step 10

Go to Step 7

7

1. Remove the horn switch(es) from the steering wheel.
2. Ensure that the test lamp is still connected between horn relay terminal 86 and terminal 85.
3. Connect a fused jumper (5A) from the ground to the spring loaded terminal leading toward the underhood accessory wiring junction block.

Does the test lamp light?

--

Go to Step 9

Go to Step 8

8 | Repair a short to B+ power or an open in CKT 28. Is the symptom still present? | -- | System OK | --

9

1. Inspect the ground wire connections for the horn switches in the steering wheel.
2. If all of the connections are OK, replace the horn switches.

• | For Chevrolet refer to Steering Wheel Replacement in Steering Wheel and Column - Tilt.

• | For Pontiac the horn switches are not serviceable. Inspect the horn lead for an open or bad connections, also inspect the inflator module to steering wheel contacts for a bad connection, refer to Inflatable Restraint Steering Wheel Module Replacement in SIR

• | Oldsmobile, refer to Inflatable Restraint Steering Wheel Module Replacement in SIR.

Is the symptom still present?

--

System OK

--

10 | Momentarily connect a fused jumper (5A) between horn relay terminal 30 and terminal 87. Do the horns sound? | -- | Go to Step 11 | Go to Step 12
11 | Replace the horn relay, in Underhood Accessory Wiring Junction Block. Is the symptom still present? | -- | System OK | --

12

1. Remove the left and right horn connectors.
2. Connect a fused jumper (5A) from the ground to terminal A at the left horn or the right horn.
3. Connect a fused jumper (5A) from B+ power to terminal B at the left horn or the right horn.

Do the horns sound?

--

Go to Step 14

Go to Step 13

13 | Replace the inoperative horns. Horn Replacement Is the symptom still present? | -- | System OK | --

14

Using a J 39200 , test for continuity to ground in the following circuits:

• | CKT 1250

• | CKT 1350

Do CKT 1250 and CKT 1350 show continuity to ground?

--

Go to Step 16

Go to Step 15

15 | Repair CKT 1250 or CKT 1350 for an open to G102 or G101. Is the repair complete? | -- | System OK | --
16 | Repair an open in CKT 29, between the underhood accessory wiring junction block and the inoperative horn(s). Is the repair complete? | -- | System OK | --