I keep blowing fuses and can't find wear the short is. Where can I get a shematic.

 

Lots of possible culprits here. Be more specific if you want a good answer.

-forget the bulbs do the rear lights fill up with water when it rains? do they show signs of condensation?
-does the fuse pop as soon as you turn on the parklights, or as soon as you change it?
-do you have an alarm/remote starter/after market tach in the car?
-if the fuse does pop as soon as you put it in, what happens if you pull out all the bulbs in the rear and then put the fuse in (does it still pop)?

Answer these questions to give people a better understanding of your problem, you might find a solution

 

have you been messing around with your radio lately.
make sure you dont have any exposed wires back there if you have.

if its not back there, then you have some work ahead of you.

 

make sure your brakelights aren't grounding tieing together with your tail lights... this will cause a lot of frustration

just check wires is the best advice for you