scottboi

hi im new to all this scooby stuff and ive recently bought myself a classic wagon. the problem i have is the rear brake lights seam to not work now and again but as soon as i remove the bulb holder from the lights it works. all the other lights work i.e indicators and reverse light but just seems to be the brake light. the centre brakelight works fine so its not the brake pedal switch. also my rear wiper only seams to work when you open the boot :S i know its confusing but i was thinking it could be an earth of somesort. has anyone elase had these problems. any help would be much apreciated thanks