PINPOINT TEST F : The Siren Speaker Is Inoperative: Notes

Diagnostic Overview 

The Siren Speaker Is Inoperative 

Normal Operation and Fault Conditions 

Refer to Siren and Speaker System .

Possible Sources 

• Fuse
• Wiring, terminals or connectors
• Siren speaker
• Control head
• Lighting and siren control module

Visual Inspection and Diagnostic Pre-checks 

• Verify the lighting and siren control module 20A siren fuse is OK.