Electrical problem
1998 Fiat Bravo 4 cyl Two Wheel Drive Manual 27800 miles

Hi,
im wondering can you help. I have a 98 fiat bravo 1.4sx model. When i turn on my back wiper my rear window heater comes on even though the heater button is not pressed, the wiper also doesnt turn on and a ticking noise is made. I have changed the motor and the problem still exists. also wen i drive the heater light flashes on and aff irradically as if in key with the bumps in the road.
please help,
sean