Automotive Relay Tester and Bypass Jumper Set, Black

This automotive relay tester and bypass jumper set gives technicians and DIY mechanics manual control of relay-operated circuits for diagnostics. Plug the bypass switch into the relay socket to operate components such as fuel pumps, cooling fans, window motors, headlights, or A/C compressor circuits without relying on the vehicle key-on command.

• Provides independent circuit control for fuel pump pressure testing and other relay-controlled automotive systems.
• Plug-and-play design replaces the original relay during testing for quick manual on/off operation.
• Integrated red amp loop allows current monitoring with a clamp-on ammeter or lab scope.
• Rated for up to 20A continuous current and 30A surge at 12V.
• Useful for diagnosing parasitic draws, excessive current consumption, and component operation issues.
• Set includes 6 relay bypass switches for working across multiple relay socket types or testing needs.

Choose the Black option for the relay bypass switch set only. Choose the Black Set + Disposable Gloves option if you also want 5 pairs of disposable gloves for cleaner diagnostic work. The BUY 1 and BUY 2 selections refer to order quantity; select BUY 2 if you need an additional set for a second toolbox, shop bay, or backup supply.

Before use, verify the relay type and size in your vehicle fuse box to confirm compatibility. Turn the ignition off before installing or removing a bypass switch. Remove the original relay, plug the bypass switch into the socket, then use the switch for temporary diagnostic control of the circuit. Do not leave the bypass switch installed permanently; it is intended for testing and troubleshooting only.