I am not trying to split hairs, but you are not measuring the current (Amps) to your relay. You are measuring the Voltage. With the negative lead on ground, and the meter set on the 50Volt DC Volt scale, put your positive lead on the point where you are looking for voltage. You then should read approximately 12 to 14Volts depending on whether the engine is running or not. If you have anything in that range, then you are getting voltage supplied to the point you are testing.

From what you have written, I would suggest that you google around and find a good explanation of Ohms Law. Learn that and you know the alphabet that electronics is based on. Basically Voltage is like measuring the pressure at a point. Ohms is measuring the resistance to flow. Amps is the volume of flow.

For simple testing of automotive switches and controls, you want to see voltage feeding whatever it is that you're testing.

Hope this helps.

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