Recently purchased a Nissan Safari 88. Guy I bought it off said it may have an earth leakage. The batteries would drain for no apparent reason if it had been sitting for a few days. Both batteries were getting weak CCAs so I had them replaced. Also had the auto electric guys in Melbourne ran tests to see if anything was drawing current when the car was off. Nothing... I know zero about electronics but once in a while I will see just the front passenger side headlight come on and stay on until I flick the headlight controls on then off. It happens only once in a while. Could moisture be causing this? Faulty wiring? Thanks in advance for any help.