Shop Our Products. Circuit Tester Store / Circuit Tester Refine by Sort by We recommend Newest arrivals Price: Low to High Price: High to Low Name: A to Z Name: Z to A Cornwell Tools In Line Ignition/Spark Plug Tester, LS20610 Cornwell Tools In Line Ignition/Spark Plug Tester, LS20610 $10.00 Power Probe Short Circuit Finder Kit, ECT2000 Power Probe Short Circuit Finder Kit, ECT2000 $125.00 Snap On Multi - Probe Ultra Circuit Tester, EECT900 Snap On Multi - Probe Ultra Circuit Tester, EECT900 $250.00 Matco Extra Long Heavy Duty Circuit Tester, MD117B Matco Extra Long Heavy Duty Circuit Tester, MD117B $35.00 Snap On Multi-Probe Ultra Circuit Tester, EECT900 Snap On Multi-Probe Ultra Circuit Tester, EECT900 $300.00 Power Probe 3 Power Probe 3 $125.00 Blue Point 7 Round Pin Tractor Trailer Light Circuit Tester, YA3179B Blue Point 7 Round Pin Tractor Trailer Light Circuit Tester, YA3179B $55.00 Blue Point Trailer Harness Tester, TLT6 Blue Point Trailer Harness Tester, TLT6 $35.00 New Snap On 4-49 V DC Circuit Tester with Interchangeable Shanks, EECT449HD Snap On 4-49 V DC Circuit Tester with Interchangeable Shanks, EECT449HD $145.00 New Snap On 6/12 V Classic Bulb Circuit Tester, EECT30H Snap On 6/12 V Classic Bulb Circuit Tester, EECT30H $50.00 New Snap On 12 V DC Digital Display Circuit Tester, EECT400R Snap On 12 V DC Digital Display Circuit Tester, EECT400R $95.00 New Snap On 12 V Digital Display Circuit Tester with USB Plug, EECT402USB Snap On 12 V Digital Display Circuit Tester with USB Plug, EECT402USB $120.00 New Snap On 12 V DC Digital Display Circuit Tester, EECT400 Snap On 12 V DC Digital Display Circuit Tester, EECT400 $95.00 New Snap On Digital LCD Circuit Tester 6 & 12 Volt DC, EECT400-TT Snap On Digital LCD Circuit Tester 6 & 12 Volt DC, EECT400-TT $135.00 New Power Probe 5 Volt Adapter, PPT5VA Power Probe 5 Volt Adapter, PPT5VA $20.00 New Power Probe Gold Series Lead Set, PPLS01 Power Probe Gold Series Lead Set, PPLS01 $80.00 New Power Probe III Circuit Tester, PP319FTCRED Power Probe III Circuit Tester, PP319FTCRED $165.00 Cornwell 12/24 Volt System Relay Circuit Tester, HR76 Cornwell 12/24 Volt System Relay Circuit Tester, HR76 $120.00 Snap On Multi-Probe For 6-48 Volt Dc Systems, CT3000KT Snap On Multi-Probe For 6-48 Volt Dc Systems, CT3000KT $235.00 Snap On 12 V DC Digital Display Circuit Tester, EECT400BL Snap On 12 V DC Digital Display Circuit Tester, EECT400BL $70.00 New Power Probe 3 Circuit Tester, PP319FTCGRN Power Probe 3 Circuit Tester, PP319FTCGRN $160.00 Snap On 24 V Digital Display Circuit Tester (4-49 V DC Range) EECT424HD Snap On 24 V Digital Display Circuit Tester (4-49 V DC Range) EECT424HD $120.00 Lisle Relay Test Jumper Kit, 56810 Lisle Relay Test Jumper Kit, 56810 $45.00 Kimball Midwest 12-24v Circuit Check Pro 4 Plus, 22-832 Kimball Midwest 12-24v Circuit Check Pro 4 Plus, 22-832 $60.00 IPA 6-way Round Pin Trailer Circuit Tester, 7897 IPA 6-way Round Pin Trailer Circuit Tester, 7897 $15.00 Snap On Multi-Probe Ultra Digital Display Circuit Testers, EECT800 Snap On Multi-Probe Ultra Digital Display Circuit Testers, EECT800 $200.00 Snap On 6/12V Classic Bulb Circuit Tester, CT2 Snap On 6/12V Classic Bulb Circuit Tester, CT2 $25.00 New Power Probe IV Diagnostic Circuit Tester, Power Probe 4 New Power Probe IV Diagnostic Circuit Tester, Power Probe 4 $220.00 New Power Probe III Circuit Tester New Power Probe III Circuit Tester $130.00 Mac Tools 3-49V LCD Screen Test Light, ET28830 Mac Tools 3-49V LCD Screen Test Light, ET28830 $85.00 Snap On 12V DC Digital Display Circuit Tester, EECT400G Snap On 12V DC Digital Display Circuit Tester, EECT400G $65.00