The resistance should not be 0, set your meter to read ohms, set it on the lowest scale, and recheck 85 to 86 with the wires removed from the relay terminals. If it still reads 0 both ways, then you have a bad relay. resistance should be between 75 and 200 ohms
If resistance is good.
Set meter to read volts on a scale that can read 12V, most likely will be 20V scale.
Connect the black lead of the tester to the negative terminal of the bikes battery.
Then using the red lead of the tester, check the voltage on all 4 terminals of the relay with the switch in the on position.