Reply to "Cooling system questions"

Tim H; By your VIN number, you have a Pre-L. On some of the late '71's and early '72's, a single red wire from the ignition switch triggers fuse #11, and a single pink wire goes to one fan relay and then a jumper wire to the second relay. Therefore, your fans are powered by one single circuit. You mentioned you have a Fluidyne radiator and are considering a new fuse panel. AN ASSUMPTION: If you have newer fans with the Fluidyne and the original fuse panel, you are overloading the circuit. I would start at the fuse panel, check fuses and work your way through the circuit to the relays, then to the fans. If you have the original fuse panel and powered only by fuse #11, its overloaded. Some models have both #11 and #12 fuses powering the fan relays. Once again, you may still be overloading the circuits.
When you mentioned your fan light is not coming on, the light is being fed by a yellow wire from the fan relays. Sounds as if the relays are not receiving any power.
As mentioned in a previous post, George P. has published a number of articles to address the fans. Also, there is an article by Mike Drew that addresses the fan issue.