back up sensor?

[macknos94]

i installed a aftermarket headunit a few months ago and it got rid of my backup sensor system. is there a way to hook up a beeper to make it work again? this might be a dumb question but i think it was on the factory headunit and it would have to be hooked up to one of the plugs. anyone know how to make it work again

 

[JCUZ]

I have mine hooked up to a little piezo speaker which sits behind the trim covering the drivers side seat belt; works really well.

 

[macknos94]

so what wires would i have to hook it up too? i looked in the wiring in the haynes manual and it doesnt say anything about the backup sensors