ABS rumble motor via relais

Hi Guys,

This is my first post here, i really love the software!

I build the ABS rumble motor on my brake pedal but ordered the old (DK) motor shield for the arduino, that doesnt do much and is slow on reacting or sometime not at all..
So i was wondering if it is possible by just use a arduino nano and a little relais to active the rumble motor with a external powersupply.. simple on or off connected to the function ABS on or off..

Abit like the PWN fan controllers with extra relais function.

Greetings, 
Martijn