Thanks, everyone. The cooling system works fine, but what I ended up doing is buying the "kit" in the Mid-America catalog that includes both a 200 degree temperature switch and harness that, in '89s, will automatically trigger both fans at a lower temperature than when the ECM would usually cut in the main fan. I had been looking at all sorts of solutions to running a more even temperature for months (you know, revised computer chips, etc.)---I don't like the wide swings, even if it is normal. The previous owner had already installed a lower temperature switch for the auxiliary fan, so I left that in and simply hooked up the new harness as instructed. This is a TERRIFIC little kit---other companies/catalogs sell something similar, but this came with great instructions for all C4s that are very easy to figure out (no wiring diagrams, but simple sketches based on year of car, and I saw in a recent "sale" email from MidAmerica that you can look at the instructions on line). It took me only about 20 minutes to put in, and it works great. Switch and harness are about $25, I believe. Maybe I should put this into a separate thread, as there are frequently posts about temperature switches, chips etc., and this is a really simple, effective and cheap solution that avoids having to deal with all the "miracle chips" and exotic solutions crowd. Yesterday, put the surfboard out the hatch and went down to enjoy some surf in Galveston from Hurricane Dennis---happy and cool '89 Ebay rat and owner.
/s/ Chris Kennedy
