BOLD MAGENTA part numbers are new for 2025 SERVICE & MAINTENANCE TOOLS DRAGSPECIALTIES.COM TIRE & SERVICE | 2025 SERVICE & MAINTENANCE TOOLS 559 DESCRIPTION PART # Digital circuit tester 3807-0660 DIGITAL CIRCUIT TESTER •Red backlit display indicates positive polarity and green backlit display indicates negative polarity • Stainless steel probe with 12” coiled cord and alligator clamp for secure connections •Operating range 2.6 to 32VDC to work on most vehicle electrical systems •Heavy-duty circuit tester with digital display to accurately show DC voltage DESCRIPTION PART # Test case 3807-0720 TEST CASE •Eliminates guesswork when troubleshooting issues •Plugs into an electrical receptacle for power •Has built-in brake and turn signal momentary switches for testing lighting functions •Case is pre-wired and equipped with plugs for connecting Custom Dynamics most popular LED products •Additional easy-to-use terminal connectors for universal wiring attachments also included •Running power switch •Power adapter included DESCRIPTION PART # OptiMate™ test TS121 3807-0245 OPTIMATE™ TEST TS121 BATTERY AND CHARGING SYSTEM/ALTERNATOR TESTER • Fast, accurate and professional on-vehicle testing of 12V batteries and charging systems •Checks battery voltage to provide an indication of battery health; checks battery starting power and checks charging system without disassembly by indicating low charging voltage • Connect directly to the battery or “live” 12V outlet •Battery clips are removable and replaceable • Includes two cable straps, adhesive hook-and-loop straps and screws for use if mounting the removable backplate into an enclosure
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