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Originally Posted by Meister
Thank you for that very thorough write up on the simple fan mod and the effectiveness of the Prestone 170-degree tstat, 330toSRT8.
How long would you say the fan mod took you to install?
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With all the parts in hand it should take less than one hour. Here is the schematic from nCHARGE that I used. I added a few comments to the image. This install requires several male and female disconnects for the connections. The sheetmetal tab already has a 1/8" hole but will need to be enlarged to approx. 1/2" for most switches. The strip panel on the driver side doorway can be easily removed by pulling it (it is held by 2 tangs). Then remove the large panel under the steering wheel by removing the two screws and gently pulling (it is held by about 4 tangs). Removing these two pieces allows good access to route the switch wire and you can remove the entire piece of sheetmetal for easier drilling (held on my 4 bolts). Jim Turner's Fan Mod instructions contains photos of what I describe.
Here is the schematic:
And here's what my fusebox looks like. You can see there is only one wire entering the box and the box closes with no problem when the wire is positioned on the metal tab.
Here is the switch above the gas pedal area:
