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Automotive Relay Tester
This tester quickly and easily:
• Tests 4/5 Pin Relays – sockets are included for the three
most common automotive different relay types.
• Tester uses 12V power source from vehicle, cycles
the relay 10 times applying a signal to relay coil while
checking the function of the relay contacts.
• The tester will fail the relay if one of the cycles proves
unsuccessful during the test.
• Automatic Test with Pass/Fail indication - switch
contacts loaded to detect excessive resistance.
• Quick and easy "off the car" relay test.
LED
A
Test Button
B
Switch: 4 pin or 5 pin
C
Red (+) alligator clip
D
Black (-) alligator clip
E
www.lasertools.co.uk
E
D
A
Relay Tester
4
TEST
PIN
B
5562
C
Instructions
1. Connect the tester to the power source, usually the car
battery: black alligator clip to the negative terminal, red
alligator clip to the positive terminal.
2. LED (A) will light up red when tester is connected to the
power source.
3. Remove the relay to be checked from the vehicle.
4. Choose the pin coniguration of the relay and set the
selection switch (C) to either 4-pin or 5-pin.
5. Plug the relay into the appropriate pin sockets on the
tester.
6. Press (and release) the Test Button (B).
7. Tester will cycle (open and close) the relay 10 times. If
test is successful and the relay is functioning correctly,
the LED (A) will illuminate GREEN. If the test is
unsuccessful the LED will illuminate RED.
8. To inish, remove relay from tester and disconnect
power leads.
Note:
A "sticking" relay may not respond (and start the test) when
the test button is pressed. Flicking the relay with a inger
5
PIN
can unstick the relay and the test will start.
The continuing cycling during the test may free off the
sticking contacts temporarily, however always replace
any relay suspected of intermittent "sticking" as
soon as is practical. If the relay does not respond at all
then it is unserviceable.
www.lasertools.co.uk
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