Your Whistler detector is expertly engineered and designed 
to exacting quality standards to provide you with reliable, 
trouble-free operation. If your unit has been correctly installed 
following the guidelines in this manual, but is not operating 
optimally, please refer to the troubleshooting guide below.
PROBLEM: No display or audio.
• Check fuse in Whistler plug; replace if necessary with a 
2 amp 3AG type.
• Check fuse for lighter socket; replace if necessary.
• Make sure lighter socket is clean.
PROBLEM: Unit alarms when vehicle hits bumps.
• Check for loose lighter socket; tighten and clean.
• Check connections at both ends of power cord. Substitute 
another cord to determine if cord is defective. Return 
defective cord to the factory. 
PROBLEM: Unit alarms when using vehicle equipment,
electrical accessories (brakes, power mirrors/windows, 
directionals, horn, etc.), or when accelerating.
• Vehicle’s electrical system, including battery and alternator , 
may have electrical noise. Install a filter capacitor (470mfd. 
25 volt or larger capacitance value) on the back of the 
lighter socket.
PROBLEM: Audio alerts are not loud enough.
• Cancel Auto Quiet Mode or City Mode.
If difficulties occur which cannot be solved by information in 
this Troubleshooting Guide, please call Whistler Consumer 
Relations at 1-800-531-0004 before returning your unit for 
service.
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TROUBLESHOOTING GUIDE