Lequduo 9038 Relay Tester, 9038 Diagnostic Scan Tool Fuel Pump Relay Bypass Master Switch Kit Replace 9036 9037, Pack Of 6

These Relay Bypasses Are Great For Electrical Diagnostics, They Help Save A Good Amount Of Time In Terms Of Narrowing Down What Could Be Wrong On A Car. A Must Have For Any Mechanic’S Toolbox. Some Circuits Are Hard To Test Like Fuel Pump Or Horn Because You Need Somebody Else To Help You Press The Button But With These You’Re Able To Put In The Relay And Turn On The Circuit Without The Need Of A Second Person.
These Are For More Than Just Fuel Pumps, You Can Use Them For Headlight Switches, A/C Compressors, And Anything Else That Uses A Relay On A Car.