Circuit Testers

Lisle 29050 Digital Circuit Tester 3-30V Features 360° visibility of polarity. Operating range 3-30 volts DC to work on most vehicle electrical systems. The probe is insulated to prevent the possibility of shorting the side of the probe to...

Lisle 69250 Fused Power Switch With Leads Terminal Leads With Power/Switch/Fuse. Features Provides easy access to check current or voltage on nearly all of the fuses and relays used on vehicles today. Includes five pairs of terminal lead wires with...

Lisle 69300 Master Relay Set W/Leads Switch Fuse Power Master Relay & Fused Circuit Test Kit. Features  Kit Makes Testing Relays or Live Circuits Quick and Easy. Includes 8 Jumpers to fit most popular relays. Includes Test Lead Kit for...

Lisle 24560 Replacement Bulb Features Replacement part for Lisle tool 24550   WARNING: California Prop 65

Lisle 28620 Circuit Tester With Buzzer Features Heavy-Duty Tester Signals with a Light and a Buzzer. Tests low voltage up to 28 volts. Spring loaded hook can be removed to use the probe tip only. Can also be used to check polarity and battery...

Lisle 24550 Computer Safe Circuit Tester Features Indicates polarity. Safe for automotive computers. Won’t damage sensitive electronic components. Draws less than 21mA at 12-Volts DC. Operating range 3-28-Volts. The red light indicates...

Lisle 26250 Circuit Tester Low Circuit Tester. Features  Quick check both AC and DC current up to 12 volts with power on. Helps locate shorts or breaks in wiring. Complete with insulated grounding clip. Optional accessories (Sold...

Lisle 27430 24V Heavy Duty Circuit Tester Features Heavy duty probe, cord and clamp. The probe is insulated with high-visibility shrink tubing to prevent the possibility of shorting the side of the probe to other components. Comes with a strain...

Lisle 28400 H/D Circuit Tester Features Quickly tests low voltage up to 12 Volts. A heavy duty circuit tester for lifetime use. The probe, handle, cord and clamp are reinforced for extra durability. Comes with a strain relief spring on the cord. Cord is...

Lisle 28830 Digital Circuit Tester 3-48V Features Heavy-Duty Circuit Tester with Digital LCD Display to accurately show DC voltage. Operating range of 3-48 volts DC to work on most vehicle electrical systems. 360° visibility of polarity. The...

Lisle 32900 Hvy Duty Circuit Tester / Jumper Features A 2-in-1 Tester that Tests Circuits up to 28 Volts and Works as a Jumper Wire for Power or Ground. Heavy-duty circuit tester for checking low voltage up to 28 volts. By depressing the red...

Lisle 28440 Bulb and Spring Assy Features Replacement Bulb for Lisle 32900 Heavy Duty Circuit Tester / Jumper.   WARNING: California Prop 65