Reversing Circuit using a switch

This circuit is a DPDT center off Momentary switch used for polarity reversing.

A switch like this will do the trick. DPDT 20-Amp Momentary Flip Switch : Flip Switches | RadioShack.com

Thanks canepole and Don, will get one

Tom, We lost cell signal this morning. Will call later this evening.

Thanks for helping Gene out..

...and the question, Alex, is "how do I make my TM run backwards?"

The Radio Shack switch I linked to is not waterproof. You can get a dpdt momentary center off bat handle switch and put it in a box and put rubber cover on it or there are some rocker switches in the same configuration that are waterproof. I usually use bat handle switches and put a rubber on them for economics.

Thanks Canepole, it work ,now I can steer my cable TM from the back of boat when it rain while under Bimini Top

Glad it worked out for you.