I would take a multimeter and keep checking voltage tracing the wiring until you find where it stops. At least then you can narrow down the location. Check your ground.
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-Dan
"What's the matter Col Sanders? Chicken?" -Dark Helmet
lu·di·crous [loo-di-kruhs] adjective
causing laughter because of absurdity; provoking or deserving derision; ridiculous; laughable
i guess first you should tell us if you have any other power on the bus. if other stuff works good like the lights, for example, then maybe it is in the starting circuit.
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Jesus Christ... Conversion in progress.