I have a 1999 ford windstar103000. Recently I mistakenly hook the battery up backwards. It ended up frying through the fuseable link. I have replaced the battery cables. It will start, but while it is idleing the windsheild wiper will run without turning it on and the speedometer gage will rise to about 40 miles per hour. Then It just dies. Does anyone have any ideas as to what the problem may be.