Questions about 89 lx conv

I have an 89 lx 4 cyl. My signal lights aren't working and both of my doors won't lock. The hazzard lights work so I'm sure the bulbs aren't burned out. The doors won't lock at all, so I currently remove the coil wire when I park it outside. I'm new to Fords any help would be appreciated. Also, has anyone replaced a convertible top on one of these? Mine leaks very badly and the leather is beginning to harden. How much would it cost to replace with one of stock quality?

Thanks in advance.