Truck Accessories & Truck PartsATV Parts & AccessoriesAuto DriveAuto Repair ToolsAutomotive ElectricalCar CustomizationCar LightingCar Safety and SecurityDiagnostic and Test ToolsEngine & Powertrain Replacement PartsEverStartExterior Car DecorationHonda Powersports Parts & AccessoriesJeep LightingMarine ElectricalOther Interior Car AccessoriesReplacement Auto Parts
Sort by|
Find auto parts that fit
Let’s search for parts that fit your vehicle.*Required fields
Truck Accessories & Truck PartsATV Parts & AccessoriesAuto DriveAuto Repair ToolsAutomotive ElectricalCar CustomizationCar LightingCar Safety and SecurityDiagnostic and Test ToolsEngine & Powertrain Replacement PartsEverStartExterior Car DecorationHonda Powersports Parts & AccessoriesJeep LightingMarine ElectricalOther Interior Car AccessoriesReplacement Auto Parts
Relay Checker(73)
Uses item details. Price when purchased online
2026 Upgrade Automotive Circuit Fault Probe Tester, Portable High-Precision 20a 48v Car Circuit Probe Tester with Led Display & Front Lighting, Water Proof Car Relay Fuse Blade Checker (1pcs) From $11.99
From$1199
2026 Upgrade Automotive Circuit Fault Probe Tester, Portable High-Precision 20a 48v Car Circuit Probe Tester with Led Display & Front Lighting, Water Proof Car Relay Fuse Blade Checker (1pcs)
Electronic Specialties ESI-194 Super Relay Buddy Relay Tester $140.44
$14044
current price $140.44Electronic Specialties ESI-194 Super Relay Buddy Relay Tester
15 out of 5 Stars. 1 reviews
Electronic Specialties 191 Relay Buddy Pro Test Kit $129.74 Was $208.99
Now$12974
current price Now $129.74, Was $208.99$208.99
Electronic Specialties 191 Relay Buddy Pro Test Kit
15 out of 5 Stars. 1 reviews
Automotive Circuit Fault Probe Tester, High-Precision Current Tester, 20A 48V Car Relay Fuse Blade Checker, Built-in Front Light with Blue Backlit LCD Screen.(1 pcs) From $25.59
2 options
Available in additional 2 optionsFrom$2559
Automotive Circuit Fault Probe Tester, High-Precision Current Tester, 20A 48V Car Relay Fuse Blade Checker, Built-in Front Light with Blue Backlit LCD Screen.(1 pcs)
2026 Automotive Circuit Fault Probe Tester, 20A 48V Car Relay Fuse Blade Checker High Precision, 2-in-1 Portable Current Waterproof Diagnostic Tool with LED Display Lighting for Vehicle (1pcs) From $18.87
From$1887
2026 Automotive Circuit Fault Probe Tester, 20A 48V Car Relay Fuse Blade Checker High Precision, 2-in-1 Portable Current Waterproof Diagnostic Tool with LED Display Lighting for Vehicle (1pcs)
21 out of 5 Stars. 2 reviews
Clearance Automotive Circuit Fault Probe TesterHigh-Precision Tester 20A 48V Car Relay Blade Checker Built-in Front Light With Blue Backlit LCD Screen Was $16.88
Automotive Circuit Fault Probe TesterHigh-Precision Tester 20A 48V Car Relay Blade Checker Built-in Front Light With Blue Backlit LCD Screen
Electronic Specialties 192 12/24 Volt Diagnostic Relay Buddy Testing Tool $78.74
$7874
current price $78.74Electronic Specialties 192 12/24 Volt Diagnostic Relay Buddy Testing Tool
34.7 out of 5 Stars. 3 reviews
Automotive Circuit Fault Probe Tester, 20A 48V Car Relay Fuse Blade Checker with LED Display & Front,Short & Open Finder $19.64
$1964
current price $19.64Automotive Circuit Fault Probe Tester, 20A 48V Car Relay Fuse Blade Checker with LED Display & Front,Short & Open Finder
Automotive Circuit Fault Probe Tester | 20A 48V High-Precision Car Relay Fuse Blade Checker with LED Display From $24.88
From$2488
Automotive Circuit Fault Probe Tester | 20A 48V High-Precision Car Relay Fuse Blade Checker with LED Display
Automotive Circuit Fault Probe TesterHigh-Precision Tester 20A 48V Car Relay Blade Checker Built-in Front Light With Blue Backlit LCD Screen
Automotive Circuit Fault Probe TesterHigh-Precision Tester 20A 48V Car Relay Blade Checker Built-in Front Light With Blue Backlit LCD Screen
Clearance Automotive Circuit Fault Probe Tester, High-Precision Current Tester, 20A 48V Car Relay Fuse Blade Checker, Built-in Front Light with Blue Backlit LCD Screen(1PC) From $12.99
From$1299
Automotive Circuit Fault Probe Tester, High-Precision Current Tester, 20A 48V Car Relay Fuse Blade Checker, Built-in Front Light with Blue Backlit LCD Screen(1PC)
Clearance Automotive Circuit Fault Probe Tester, High-Precision Current Tester, 20A 48V Car Relay Fuse Blade Checker, Built-in Front Light with Blue Backlit LCD Screen (2pcs) Was $40.99
Automotive Circuit Fault Probe Tester, High-Precision Current Tester, 20A 48V Car Relay Fuse Blade Checker, Built-in Front Light with Blue Backlit LCD Screen (2pcs)
14 out of 5 Stars. 1 reviews
Automotive Circuit Fault Probe Tester, High-Precision Current Tester, 20A 48V Car Relay Fuse Blade Checker, Built-in Front Light with Blue Backlit LCD Screen From $25.77
From$2577
Automotive Circuit Fault Probe Tester, High-Precision Current Tester, 20A 48V Car Relay Fuse Blade Checker, Built-in Front Light with Blue Backlit LCD Screen
Clearance Lignoak Automotive Circuit Fault Probe Testerhigh-Precision Tester 20A 48V Car Relay Blade Checker Built-In Front Light With Blue Backlit Lcd Screen Blue Free Size Was $19.69
Lignoak Automotive Circuit Fault Probe Testerhigh-Precision Tester 20A 48V Car Relay Blade Checker Built-In Front Light With Blue Backlit Lcd Screen Blue Free Size
Automotive Circuit Fault Probe Tester, 20A 48V Car Relay Fuse Blade Checker with Blue Backlit LCD Screen & Front Light, Portable High-Precision Current Tester From $27.99
From$2799
Automotive Circuit Fault Probe Tester, 20A 48V Car Relay Fuse Blade Checker with Blue Backlit LCD Screen & Front Light, Portable High-Precision Current Tester
Clearance Automotive Circuit Fault Probe Tester, Automotive Open & Short Finder, Car Relay Fuse Blade Checker, 20A 48V Wire Tracer with LED Display and Lighting, Portable High-Precision Current Tester(1PC) From $12.99
From$1299
Automotive Circuit Fault Probe Tester, Automotive Open & Short Finder, Car Relay Fuse Blade Checker, 20A 48V Wire Tracer with LED Display and Lighting, Portable High-Precision Current Tester(1PC)
GJX Automotive Circuit Fault Probe Tester,High-Precision Current Tester,20A 48V Car Relay Fuse Blade Checker,Built-in Front Light with Blue Backlit LCD Screen (1pcs) $17.97
$1797
current price $17.97GJX Automotive Circuit Fault Probe Tester,High-Precision Current Tester,20A 48V Car Relay Fuse Blade Checker,Built-in Front Light with Blue Backlit LCD Screen (1pcs)
Wdhugt Automotive Circuit Fault Probe Tester High Precision 48V Car Relay Fuse Blade Checker With Blue Backlit Lcd Screen
Wdhugt Automotive Circuit Fault Probe Tester High Precision 48V Car Relay Fuse Blade Checker With Blue Backlit Lcd Screen
ZZERHUOO Automotive Circuit Fault Probe Tester High Precision Tester 20A 48V Relay Checker Built In Front Light With Blue Backlit LCD Screen Was $21.65
ZZERHUOO Automotive Circuit Fault Probe Tester High Precision Tester 20A 48V Relay Checker Built In Front Light With Blue Backlit LCD Screen
Automotive Circuit Fault Probe Tester, 20A 48V-High-Precision Current Tester, 2-in-1 Wire Tracer Short Finder, Car Relay Fuse Checker with LED Display & Front Light $23.99
$2399
current price $23.99Automotive Circuit Fault Probe Tester, 20A 48V-High-Precision Current Tester, 2-in-1 Wire Tracer Short Finder, Car Relay Fuse Checker with LED Display & Front Light
GJX Automotive Circuit Fault Probe Tester,Portable High-Precision Current Tester,20A 48V Car Relay Fuse Blade Checker Test Light with LED Display and Lighting 2-in-1 Car Short Finder(1PC) $18.47
$1847
current price $18.47GJX Automotive Circuit Fault Probe Tester,Portable High-Precision Current Tester,20A 48V Car Relay Fuse Blade Checker Test Light with LED Display and Lighting 2-in-1 Car Short Finder(1PC)
Yannianjz Automotive Circuit Fault Probe Tester, High-Precision 20A 48V Car Relay Tester and Blade Fuse Checker, Built-in Front Light with Blue Backlit LCD Screen for Vehicle Electrical System $15.99
$1599
current price $15.99Yannianjz Automotive Circuit Fault Probe Tester, High-Precision 20A 48V Car Relay Tester and Blade Fuse Checker, Built-in Front Light with Blue Backlit LCD Screen for Vehicle Electrical System
Smoke Tester Automotive, Automotive Relay Tester, Battery Checker Tester, Car Diagnostic tool, Car Battery Tester, Current Leak detection, Auto Repair, Digital Display, 1 Pc
Smoke Tester Automotive, Automotive Relay Tester, Battery Checker Tester, Car Diagnostic tool, Car Battery Tester, Current Leak detection, Auto Repair, Digital Display, 1 Pc
ZZERHUOO Automotive Circuit Fault Probe Tester High Precision Tester 20A 48V Relay Checker Built In Front Light With Blue Backlit LCD Screen Car Exterior Lights Car Exterior Duster Car Exterior Was $21.65
ZZERHUOO Automotive Circuit Fault Probe Tester High Precision Tester 20A 48V Relay Checker Built In Front Light With Blue Backlit LCD Screen Car Exterior Lights Car Exterior Duster Car Exterior
2026 Upgraded Automotive Circuit Fault Probe Tester, High-Precision Current Tester, 20A 48V Car Relay Fuse Blade Checker, Built-in Front Light with Blue Backlit LCD Screen (1PCS) From $15.99
From$1599
2026 Upgraded Automotive Circuit Fault Probe Tester, High-Precision Current Tester, 20A 48V Car Relay Fuse Blade Checker, Built-in Front Light with Blue Backlit LCD Screen (1PCS)
Dnogom 48V 20A Automotive Circuit Fault Probe Tester, High-Precision Car Relay Checker with LCD Screen & Front Light for Car Repair Was $20.08
Dnogom 48V 20A Automotive Circuit Fault Probe Tester, High-Precision Car Relay Checker with LCD Screen & Front Light for Car Repair
OUNONA Car Relay Tester Multifunctional Circuit Electric Fence Wire Free DC $10.47
$1047
current price $10.47OUNONA Car Relay Tester Multifunctional Circuit Electric Fence Wire Free DC
Automotive Circuit Fault Probe Tester, Portable High-Precision 20a 48v Car Circuit Probe Tester with Led Display & Front Lighting, Water Proof Car Relay Fuse Blade Checker for Various Vehicles From $52.99
From$5299
Automotive Circuit Fault Probe Tester, Portable High-Precision 20a 48v Car Circuit Probe Tester with Led Display & Front Lighting, Water Proof Car Relay Fuse Blade Checker for Various Vehicles
Automotive Circuit Fault Probe Tester, Portable High-Precision 20a 48v Car Circuit Probe Tester with Led Display & Front Lighting, Water Proof Car Relay Fuse Blade Checker for Various Vehicles
Automotive Circuit Fault Probe Tester, Portable High-Precision 20a 48v Car Circuit Probe Tester with Led Display & Front Lighting, Water Proof Car Relay Fuse Blade Checker for Various Vehicles
PLPPYFS Automotive Circuit Fault Probe Tester, High-Precision Current Tester, 20A 48V Car Relay Fuse Blade Checker, Built-in Front Light with Blue Backlit LCD Screen, for Various Vehicles $19.99
$1999
current price $19.99PLPPYFS Automotive Circuit Fault Probe Tester, High-Precision Current Tester, 20A 48V Car Relay Fuse Blade Checker, Built-in Front Light with Blue Backlit LCD Screen, for Various Vehicles
2026 Upgraded Automotive Circuit Fault Probe Tester, High-Precision Current Tester, 20A 48V Car Relay Fuse Blade Checker, Built-in Front Light with Blue Backlit LCD Screen From $26.99
2 options
Available in additional 2 optionsFrom$2699
2026 Upgraded Automotive Circuit Fault Probe Tester, High-Precision Current Tester, 20A 48V Car Relay Fuse Blade Checker, Built-in Front Light with Blue Backlit LCD Screen
Automotive Circuit Fault Probe Tester | 2026 New Portable High-Precision 20A 48V Car Relay Fuse Blade Checker From $25.88
From$2588
Automotive Circuit Fault Probe Tester | 2026 New Portable High-Precision 20A 48V Car Relay Fuse Blade Checker
Automotive Circuit Fault Probe Tester, 2026 Upgrade High-Precision 20A 48v Car Circuit Probe Tester with LED Display & Front Lighting, Water Proof Car Relay Fuse Blade Checker From $24.99
From$2499
Automotive Circuit Fault Probe Tester, 2026 Upgrade High-Precision 20A 48v Car Circuit Probe Tester with LED Display & Front Lighting, Water Proof Car Relay Fuse Blade Checker
Cnbj-611 Automotive Current Tester, 20a 48v Fuse & Circuit Parasitic Draw Tester Automotive, High-Precision 0.01a-19.99a Short Finder, 2-in-1 Relay & Fuse Checker with LED Display for Car $25.28
$2528
current price $25.28Cnbj-611 Automotive Current Tester, 20a 48v Fuse & Circuit Parasitic Draw Tester Automotive, High-Precision 0.01a-19.99a Short Finder, 2-in-1 Relay & Fuse Checker with LED Display for Car
Cnbj-611 Automotive Current Tester, 20a 48v Fuse & Circuit Parasitic Draw Tester Automotive, High-Precision 0.01a-19.99a Short Finder, 2-in-1 Relay & Fuse Checker with LED Display for Car $45.28
$4528
current price $45.28Cnbj-611 Automotive Current Tester, 20a 48v Fuse & Circuit Parasitic Draw Tester Automotive, High-Precision 0.01a-19.99a Short Finder, 2-in-1 Relay & Fuse Checker with LED Display for Car
Clearance ZZERHUOO Car Exterior Stickers And Decals Car Guard Bumper Automotive Circuit Fault Probe Tester High Precision Tester 20A 48V Relay Checker Built In Front Light With Blue Backlit LCD Screen Was $21.65
ZZERHUOO Car Exterior Stickers And Decals Car Guard Bumper Automotive Circuit Fault Probe Tester High Precision Tester 20A 48V Relay Checker Built In Front Light With Blue Backlit LCD Screen
Automotive Fuse Current Tester, Current Detector/Leakage /Fault Detection, 20A 48V Car Relay Fuse Blade Checker With LCD Display For Car $16.89
$1689
current price $16.89Automotive Fuse Current Tester, Current Detector/Leakage /Fault Detection, 20A 48V Car Relay Fuse Blade Checker With LCD Display For Car
Clearance Taicans Automotive Circuit Fault Probe Tester,High-Precision Current Tester,20A 48V Car Relay Fuse Blade Checker,Built-in Front Light with Blue Backlit LCD Screen for Automotive Electrical Diagnosis $9.48 Was $16.27
Now$948
current price Now $9.48, Was $16.27$16.27
Taicans Automotive Circuit Fault Probe Tester,High-Precision Current Tester,20A 48V Car Relay Fuse Blade Checker,Built-in Front Light with Blue Backlit LCD Screen for Automotive Electrical Diagnosis
Automotive Circuit Fault Probe Tester, Portable High-Precision 20a 48v Car Circuit Probe Tester with Led Display & Front Lighting, Water Proof Car Relay Fuse Blade Checker for Various Vehicles (1PC) $23.98
$2398
current price $23.98Automotive Circuit Fault Probe Tester, Portable High-Precision 20a 48v Car Circuit Probe Tester with Led Display & Front Lighting, Water Proof Car Relay Fuse Blade Checker for Various Vehicles (1PC)
Automotive Circuit Fault Probe Tester, High-Precision Current Tester, 20A 48V Car Relay Fuse Blade Checker, Built-in Front Light with Blue Backlit LCD Screen From $24.69
From$2469
Automotive Circuit Fault Probe Tester, High-Precision Current Tester, 20A 48V Car Relay Fuse Blade Checker, Built-in Front Light with Blue Backlit LCD Screen
Popular in Relay Checker
Related Products
Car Flasher Relay Indicator Unit Aluminum Alloy Durable Construction for Automotive Safety and Multiple Vehicle Models
Car Flasher Relay Indicator Unit Aluminum Alloy Durable Construction for Automotive Safety and Multiple Vehicle Models$12.14current price $12.14Electronic Specialties ESI-194 Super Relay Buddy Relay Tester
Electronic Specialties ESI-194 Super Relay Buddy Relay Tester$140.44current price $140.44Metra MPS-35USBV 2.1A/5 V - 3.5/USB Digital Car Audio Volt Meter Vehicle Parts
Metra MPS-35USBV 2.1A/5 V - 3.5/USB Digital Car Audio Volt Meter Vehicle Parts$32.32current price $32.32Innovative Products of America Fuel Pump Relay Bypass Kit I (3-Pc Set) 9036
Innovative Products of America Fuel Pump Relay Bypass Kit I (3-Pc Set) 9036$59.49current price $59.49Twilight Sentinel Relay Connector - Compatible with 1993 Buick Skylark
Twilight Sentinel Relay Connector - Compatible with 1993 Buick Skylark$20.95current price $20.95Auto Shut Down Relay Connector - Compatible with 2005 - 2007 Ford Freestyle 2006
Auto Shut Down Relay Connector - Compatible with 2005 - 2007 Ford Freestyle 2006$20.95current price $20.95Derale 16765 Dual Relay Wire Harness Kit Fits 84-91 Cherokee (XJ)
Derale 16765 Dual Relay Wire Harness Kit Fits 84-91 Cherokee (XJ)$50.86current price $50.86ABS Modulator Relay Connector - Compatible with 1993 Buick Skylark
ABS Modulator Relay Connector - Compatible with 1993 Buick Skylark$20.95current price $20.95Twilight Sentinel Relay Connector - Compatible with 1996 Plymouth Breeze
Twilight Sentinel Relay Connector - Compatible with 1996 Plymouth Breeze$27.95current price $27.95Parts Express 12 VDC 5-Pin Relay Socket
Parts Express 12 VDC 5-Pin Relay Socket$7.50current price $7.50Circuit Opening Relay Connector - Compatible with 1993 - 1994 Lincoln Town Car
Circuit Opening Relay Connector - Compatible with 1993 - 1994 Lincoln Town Car$20.95current price $20.95Horn Relay Connector - Compatible with 1992 - 1993 GMC Typhoon
Horn Relay Connector - Compatible with 1992 - 1993 GMC Typhoon$18.95current price $18.95
