Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Component Tests and General Diagnostics






HORN

1. Disconnect wire connector at horn.
2. Using a voltmeter, connect one lead to ground terminal and the other lead to the positive wire terminal.
3. Depress the horn switch, battery voltage should be present.
4. If no voltage,Symptom Related Diagnostic Procedures. If voltage is OK, go to 5.
5. Using ohmmeter, test ground wire for continuity to ground.
6. If no ground repair as necessary.
7. If wires test OK and horn does not sound, replace horn.