The Relay Buddy 12/24 is a quick, off-car, go / no-go tester for the most common automotive relays.
• Tests the three most popular 12 and 24 volt relays – 4 and 5 pin
• Quick and easy off the car relay test
• "Push and hold" to conduct test
• Cycles relays 10 times
• Switch contacts are loaded to detect excessive resistance
• Green/Red LED displays test results (see below)
• Uses 12V or 24V power from vehicle battery
#192 Diagnostic Relay Buddy 12/24 Tester includes:
- Relay Buddy 12/24 tester with battery cables
- 1-year warranty
- Plastic Case
Test Results
Relay Buddy 12/24 provides you with an indication of the general health and functioning of the relay switch contacts and coil. It will check the control side of the relay by applying a signal to the relay coil while it checks for proper functioning of the relay contacts. Relay Buddy operates the relay several times during each test session as it watches for consistency in every cycle.
When the relay is good the Relay Buddy 12/24 will flash a green LED.
When the relay is bad the Relay Buddy 12/24 will flash a red LED:
Code 1 = 1 flash
Code 2 = 2 flashes (back to back)
Code 3 = 3 flashes (back to back to back)
One Flash = Code 1: Ensure that the Relay Selector Switch Is set properly.
Double check the number of pins of the Relay you are testing. If this is a 5 pin Relay, slide the Relay selector to “5 pin” and re-start the test, If this is a 4 pin Relay, slide the Relay selector to 4 pin” and re-start the test. If you are testing a 5 pin Relay and Code 1 persists, then the relay is not making a connection between the 30 and 87a terminals when the Relay is not powered. This alerts you to burnt” or “pitted” contacts. This Relay will need to be replaced and the vehicles circuit will need to be checked to ensure that it does not have an abnormally high Current (Amperage) draw or a blown fuse within the circuit that contains terminals 30 and 87a.
Two Flashes = Code 2: Terminal 30 is closed to Terminal 87 when the Relay is not powered.
Terminals 30 and 87 should only be connected when the Relay is turned on (while the coil is energized). This is the code you will get for “stuck” or “welded” contacts. This Relay will need to be replaced and the vehicles circuit will need to be checked to ensure that it does not have an abnormally high Current (Amperage) draw or a blown fuse within the circuit that contains terminals 30 and 87
Three Flashes = Code 3: Terminal 30 is not closing to Terminal 87 when the Relay is powered.
First, ensure you are using a 24 Volt source if you are testing a 24 Volt Relay. For a 4 or 5 Pin Relay, if you do not hear the Relay “clicking” during the testing, then the Relay coil is defective. If the coil is defective make sure that this Relay is the proper one specified for the application and in particular, is the Coil Voltage Rating correct for the application — i.e. is this a 12V Relay being used in a 24V application?
If you do hear the Relay “clicking” during the testing, then terminals 30 and 87 are not making a connection when the Relay is powered. This alerts you to “burnt” or “pitted” contacts. This Relay will need to be replaced and the vehicles circuit will need to be checked to ensure that it does not have an abnormally high Current (Amperage) draw or a blown fuse within the circuit that containS terminals 30 and 87.
