Here is a video on how you can test a Relay with or without a diagram. I cover 3.4 and 5 pin relays and all you need is a 12v source, a multimeter and a test light.
Multimeter Used in Video: [ Ссылка ]
Test Light Used in the Video: [ Ссылка ]
You may also find these other videos helpful:
How to test an alternator: [ Ссылка ]
How to Test a Car Battery: [ Ссылка ]
How to Find a Parasitic Draw: [ Ссылка ]
How to Replace an Alternator: [ Ссылка ]
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