What's causing a battery drain on our 1979 Dodge RV?

u need a multymeter(not expensive)disconnect battery-,connect meter set to read 0-10 amps between bat- and bat-clamp,meter will read the drain probably 2-5amps if bat drains fast.next remove fuses 1 at a time untill amps drain reads 0,this is the cuircit causing trouble.u then have to find every thing this cuircit feeds and test to find the fault and repair.given what u have replaced so far i suspect a light circuit staying live.most common are storage compartments with doors so u never notice the light stays on.finding faults is relativly easy if time consuming. just be methodical and watch the meter read out .the smallest of bulbs can drain a bat in24 hours or less

caine
June 2008