So I have a 1995 F150 with a 1995 5.0 V8 from a mustang. When I drive around the O/D light flashes on and off. When I am parked, hitting the unlock button on the door causes the running lights to come on and the gauge cluster to light up. The lock/unlock button on the door works to lock the truck but only when the truck is running and it wont unlock the truck at all. The fob no longer works to lock and unlock the car and when you lock the drive side door with the key the passenger side door doesn't lock. I have no idea what is wrong with it. Any help would be appreciated!!!

 

PS: I havent noticed any change in how the truck is driving