PINPOINT TEST C : An Individual Or Group Of Flashing LEDs Is Inoperative Or Always On: Notes

Diagnostic Overview 

An Individual Or Group Of Flashing LEDs Is Inoperative Or Always On 

Normal Operation and Fault Conditions 

Refer to Flashing LEDs .

Possible Sources 

• Fuse
• Wiring, terminals or connectors
• Flashing LED
• Control head
• Lighting and siren control module
• Lighting relay center

Visual Inspection and Diagnostic Pre-checks 

• Verify the lighting relay center or lighting and siren control module 10A output fuses are OK.
• Check for stuck or broken buttons on the control head.