Good day

My electronic knowledge is limited,!

I want to build a rotisserie and have a 12v motor vehicle wiper motor, that I put on 3 AA rechargeable batteries in parallel to get 1.2v so that it rotate slower, but it is still a little bit too fast. Is there any way to decrease the voltage / speed? I have tried with a resister, but it does not rotate at all. I assume it is because the current is also lower.