I DROVE MY TN 70 UPON MY TRAILER AND WHEN I STARTED IT TO DRIVE IT OFF, IT WON'T GO FORWARD OR BACKWARDS. CODE 42 IS SHOWING AND I UNDERSTAND THAT IS ELECTRICAL. ANY IDEAS WHERE I COULD START CHECKING THIS OUT MYSELF??? ALSO, WHERE CAN I GET THE MOST RESONABLE PRICED REPAIR MANUAL ON THIS THAT DOESN'T COST $100'S OF DOLLARS. NEW HELP ASAP!!!!!!!!!!