Aiwa CD-R418, 95 Nissan Micra

I just installed a AIWA CD-R418 Unit to a 95 Nissan Micra. after i install the HU, the HU seems become a main witch of the car electronic system. ( when i turn on the HU, the blower, screen wiper can turn on.) but the fuse of the side lights and instructment panal lights gone. and after i replace the fuse, and it immediately gone again. and my car is installed with a Toad immobilizer.

now, i can only unplug the HU, then can the side lights be turn on.

any gurus please help or give some suggestion on this problem. thanks.

thanks a lot. the Radio is now working, but still i can't find the ground wire, and the black cable from the HU still unconnected. is that ok? because i can't find the ground wire form the car.  how can i do? thanks.

Actually Never Mind.

You basically need to get that black wire to some bare metal that is part of vehicles chassis. this completes the cicuit for the Head unit.  I"m suprised you said its working without this wire connected. 

Under your dash should be some metal / plastic / screws etc. Find a convinient place to get the black wire to part of the metal. Either drill a new hole and use a metal screw and ring connector on the end of the wire or find an exising screw you can back off and run the wire there with a ring connector.  Make sure either way that its part of the vehicles chassis somehow and always sand rust and paint off to get bare clean metal.