Search for "JimF" and "Cool Harness" He makes em and sells em. It's actually a harness that goes between your temp sensor and your wiring harness, engaging the aux fans earlier.

Lotsa people here did this mod and are happy with it.

Hope that helps...

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Rainmaker
93 500E, 43k mi, Pics of upgrade parts
Evo II Wheels on Dunlop FM901 235/45x17s
94 Facelift
RennTech CF Airbox
RennTech ASR Defeat
RennTech Chip
1st Gear Start
97 Range Rover 4.6 HSE Vitesse, Yellow, "Tonka" (sold)