You only use 2 wires to connect your disposer up to electrical power; white & black. If you have red & yellow/blk wires also I suspect these wires came disconnected from the reset, overload or motor windings. I recommend calling for service on something like this or exchange the disposer. Here is a link for the website:
Sears Home Services
Please see the image provided below for normal wiring on a Kenmore garbage disposer. Be sure to use
when working with voltage &
before attempting service.
SAFETY NOTICE: Be sure to disconnect power to the appliance before performing any repairs. If you are not comfortable with doing any voltage checks that might be recommended, please contact your local service provider for repairs. Be aware that there could be sharp edges inside the appliance that could cause cuts or other injuries to yourself or others.