Hello, my 2017 metris passenger van, 50k miles, zero problems with it-ok, I take that back, the rear washer fluid pump fitting broke, the dealer wanted $600 to repair and replace-I fixed myself with bonding the fitting that cracked haha. Anyway, got a light on instrument panel that comes and goes "AUXILIARY BATTERY MALFUNCTION"...not always on, but maybe half the time I drive. Any remedies for it? and please don't post "take it to a dealer", I am out of warranty and refuse to pay their prices for repair-I will assume its a aux battery is dead maybe? or some fuses?