Fantastic and very informative sir. Never seen before these type vedios

Instead of having music tell us how it works. Note that each pin is numbered. 85 and 86 are the coil pins while 30, 87, and 87a are the switch pins. 87 and 87a are the two contacts to which 30 will connect. If the coil is not activated, 30 will always be connected to 87a. Think of this as the relay in the Normally Closed (OFF) position. 85 goes to the power window swtich which connects to ground. When 85 on the left relay is connected to ground 87 connects to 30 placing positive down the blue wire to the motor. The right relay is at rest so 87a is connected to 30 causing negative (ground) down the purple wire to the motor. When 85 on the right relay is connected to ground 87 connects to 30 placing positive down the purple wire to the motor. The left relay is at rest so 87a is connected to 30 causing negative (ground) down the blue wire to the motor.

Every time I do it the relay become the source of using power. Since the relays in the middle

Good video ❤

Make another video on this in full detail.

Where do 85 (switch)goes to positive or negative

I TRIED. DOESN'T WORK. SHORT CIRCUIT.

So the two 85 goes to switch like ground ?

Full details video

Which wires connect to the switch??

you shorted the terminal 87positive and 87a negative this is wrong diagram