Relay Fuse Buddy acts as a convenient relay bypass switch with live amperage readingsIs it a circuit problem or a relay problem? Relay Fuse Buddy can help diagnose the caseIn circuit bypass switch controls power downstream of relayDisplays live circuit current – 20 Amps continueous – 30 Amps momentaryTurn on and off DC motors, fuel injectors, fuel pumps and see the amp drawNo amp probes or clamp meters requiredWide coverage – includes adapters for 6 different relays