Re: No sound from stereo
What probably happened: dig this: the petrol made the wires' insulation sticky right? That means that it was degrading the insulation--therefore, you've probably got a place where the insulation is damaged and not functioning, where some of the bare wires are touching together, or where bare wires are grounding out on the chassis or frame.
Check it out...remember, even if the insulation is not broken, per se, it can still be damaged enough to not function properly.
Good Luck, oh and G'day!!!