I am running the Volvo 850 OEM relay, but without real world usage yet. Dual speed single 16" fan (also OEM Volvo 8/9 series). My first thought reading this was to check out what Ford did in the contour from a relay standpoint and try and use that. OEM product certainly gets put through the ringer from a test and use standpoint, I would start there.
1966 GT Coupe
Not much left original
Trying to do things once
MMI CO / Panhard ~ JRI / Penske ~ Astro A5 ~ FiTech ~ MGW ~ AAW