How to use a SpeedRite Fault Finder The Speedrite Fault Finder ST100 ensures maintaining your electric fence is easy by combining a voltmeter and current meter to quickly locate faults. Related Products Speedrite Remote With Fault Finder $399.00 Including GST Speedrite Fault Finder ST100 $199.00 Regular Price $309.00 Including GST Speedrite 18000i Unigizer $1,099.00 Regular Price $1,819.00 Including GST