i have an 89 force 125. i had power to the engine and i found out that my starter and solenoid are bad, so i replaced them and now when i turn the key to on and push in the key the choke engages but if i leave the key on for more than 10 or 15 seconds my negative wire connected to the battery heats up and melts. also my positive lead going from the switch to the fuse box gets extremely hot too? what is wrong?????