During service, which procedure verifies siren operation and the interlock bypass function on a safe test route?

• A. Test only the mounting hardware and seals; ignore audible outputs.
• B. Verify audible output and interlock bypass function on a safe test route; document any fault codes.
• C. Test all siren tones/patterns, verify audible output and interlock bypass function on a safe test route, and confirm no fault codes.
• D. Bypass the siren entirely to save time.

Answer: (C)