Got a little problem with my car....Had the engine washed back in April and since then I sometimes get Warning lights(CEL,ABS,Handbrake,Rear Diff and Battery)come up and the headlights are dim.

They stay on for a bit then they just go off and the car is fine for a few months then they come on again,Unfortunately they've reset before I've been able to get it to a garage.

The last time it happened it reset but Powerstation got the error code and said it was battery/charging error,They checked the alternator/battery and their both fine.

Any idea's

 

Probably a bad earth. Clean the earth cable connections and even add another from battery to engine

 

Probably your alternator on its way out it has a nice chip in there for the charging, get it too wet and it dies.
Not a good idea to wash the engine without wrapping all the electrics up.

Tony

 

I thought he knew what he was doing .