Electronic Specialties Diagnostic Relay Buddy — 12/24V, Model# ESI192

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- Tests both 12 and 24 Volt relays!
- 3 diagnostic trouble codes help define the cause of the bad relay
- Settable to 4 and 5 pin relay - Uses vehicle battery for power
- Green Light if relay is good, Red Light if relay is bad plus one of 3 diagnostic codes
- Switch contacts are loaded to detect excessive resistance
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