Earthing point

[kbj149]

Hello all - just a quicky, hope you can help.

The amp in my boot has given up the ghost, it was immediately after I went through a car wash. I've tried connecting a brand new amp and though it sparks on connection, there is no life. I think this points to an earthing problem? The stereo works fine and turns on, but the amp does not. Where do you think the wire is earthed to the vehicle? I dont suppose there can be many places on a fibreglass vehicle!

With thanks in advance.

[phillpot]

My car had the remnants (a few cables) of a sound system when I bought it. There was a thick earth cable went down behind the fuel tank, out of the hole along with the fuel pipe and was attached to the chassis close by with a clamp thingy.