Is it a circuit problem or a relay problem? Relay Fuse Buddy can help diagnose the case
In-circuit bypass switch controls power downstream of relay
Displays live circuit current -20 Amps continuous - 30 Amps momentary
Turn on and off DC motors, fuel injectors, fuel pumps and see the amp draw
Enhances your circuit & relay test capabilities
Wide coverage - includes adapters for 6 different relays
WARNING: This product can expose you to chemicals including LEAD AND LEAD COMPOUNDS, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. WARNING: This product can expose you to chemicals including DI(2-ETHYLHEXYL)PHTHALATE (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.