I have been reading on this forum for a while... finally decided to register. I ran into a guy who made this video. I have tried this myself on my Astro, No concrete results yet but some interesting things happening with my multimeter. I ran the wire into my coolant reservoir and gradually saw an increase in voltage at the battery. The coolant also held a charge of 2 volts for about 5 minutes gradually tapering off. I ran the van for a few minutes until the voltage climbed and added fresh water to the reservoir and the voltage at the battery dropped a volt with the van running. I figured with the cumulative knowledge on this site as well as your scanguages we may be able to explain the results? It would also be great if others would try it and share there result if any? I figure worst case we end up with a really good ground to the block?