I'm become crazy with my Astro van 1991. I have a problem with the blower at high speed (the last speed). There is a wire color violet to the high speed relay and this wire become very hot and melt, after 2 minutes you can hold the wire because it's too hot. I check the relay and there is a red wire big diameter who have always power, even if the ignition switch is off. If somebody can help me and tell me if the red wire must have always power or only with the ignition on and what's the problem withn the violet wire?
Thank you