Do an amperage test. Pull a batt. terminal, put ur DMM on Amps, and connect the leads one to the batt./one to the terminal u pulled off. Once you see the draw, disconnect the capacitor and see if the amperage draw goes away. If not there is another circuit thats the problem, then just start pullin fuses to figure out what circuit its on

 

i would personally invest in a amp clamp , those paper fuses in DMM's are like 10$ a piece and can only take 10 amps

 

Clamps are expensive, DMM works okay 'cause if ur battery is drawing 10 amps with everything off u got a serious problem