Okay I'm drawing up a wiring schematic for installing the Taurs fan once I can get one. For relays I'm using the 85A units that Lance from Pirate4x4 used for his fan, but I'm having trouble figuring out what to use for circuit protection. I've heard from several people (but found no concrete evidence) that the fan on high will pull up to 80A on spinup, but will draw only 12A while running. Another diagram I saw on a Chevy furom had both speeds each protected by 30A fuses, which the author said worked just fine and didn't blow. Would this be because of using slow-blow fuses, or can you get fuses that handle a temporary high amperage surge? Should I just stick with a 30A fuse for the power feed for each speed, or figure out something else? Also, when looking at some of the Painless wiring kits available, I noticed a part that, according to the decription, "provides constant voltage, protects from voltage and amperage spikes and keeps fan(s) from feeding back through the system." I can't figure out which exact component prevents the feedback (I figure the relay is what they're referring to with constant voltage and protection from voltage and amperage spikes), except maybe the silver part in this pic with the two posts (which looks like an auto resetting circuit breaker, but I can't find anything to confirm it): Last but not least, I'm wiring it up so that the fan will turn on high when I turn on the A/C. Is it the positive or negative lead that's switched on the A/C compressor? So far I figure it's the negative lead, but can someone confirm this for me?