Maybe you guys can help

So i was low pressure washing my engine bay and there is a ground running from the top of my block to the sub chassis deal by the front clip (if thats what it is called) and i have a battery relocation mod so the black cable is grounded to the start with exposed wires…could this have something to do with my odometer melting, speedometer needle falling off and the car not starting, what is weird is it started right after i washed it and i drove it around for a bit then after that it did not start

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