GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1999 🢒 S10 - Electric 🢒 Body and Accessories 🢒 Horns 🢒 Horns - Poor Tone

Step

Action

Value(s)

Yes

No

Tools Required

    • J 35616 Connector Test Adapter Kit
    • J 39200 Digital Multimeter (DMM)

1

Did you perform the Horns Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Horns

2

Inspect the horns for foreign objects or poor connections. Refer to Intermittents and Poor Connections Diagnosis in Wiring Systems

Did you complete the repair?

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Go to Diagnostic System Check - Horns

Go to Step 3

3
  1. Disconnect the horn connectors.
  2. Test the horn ground CKTs for continuity to ground. Refer to Testing for Continuity in Wiring Systems.

Is the resistance within the specified value?

0-5 ohms

Go to Step 5

Go to Step 4

4

Repair the horn ground CKTs. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Diagnostic System Check - Horns

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5
  1. Test the horn controlled voltage CKT. Refer to Measuring Voltage In Wiring Systems.
  2. Operate the horn switch.

Does the voltage equal the specified value?

B+

Go to Step 7

Go to Step 6

6

Repair the controlled voltage CKT. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Diagnostic System Check - Horns

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7
  1. Adjust the horn current. Refer to
  2. If tone is still poor replace the horn(s). Refer to Horn Replacement - Left Side or Horn Replacement - Right Side .

Did you complete the repair?

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Go to Diagnostic System Check - Horns

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