so i was out n about today and saw some guy launched his little corolla up onto a curb. i didnt ask how he did it, just offered to help. chained the car up to my front tow hooks, threw it into reverse and went back. didnt get it off the curb. so i threw it into 4 hi to get more traction as i was spinning my tires. didnt work. so i flipped the truck around and hooked him up to the rear. worked that way but now my 4hi and 4lo lights blink on and off and truck wont engage 4wd?