I recently replaced my low relay switch (upper hose) I found a part # doing a search on the web... I found a guy that had replaced his with a part # from auto zone part # SU109...$15.00 I just did mine last night and it plugged in perfect and now my low fan switches on when it's supposed to....
Not sure if the High relay switch (lower hose) is a differant temp?
Hope this helps...
98 5.9, Platinum 4.5 RE SF all adjustable arms, RE Monotube Shocks, Carolina front drive shaft, Pro Comp Extream Alloys Stryker's, 285/75/16 BFG's KM2's,Stage 1 rock sliders,Confer roof rack,Warn XD9000i winch, 3" Kolak exhaust system, Addco front swaybar and lot's more goodies.. 79 CJ5 AMC 304 33x12.5 Pro Comp X-tream mud tires on 15x12 MT classics. 3" lift.