Re: 2010 4.0 efan help
What I would do, and all you need is a cheap volt meter and a test light. Your OEM A/C fan switch (ya know... the one that cuts the fan on) should be a 2 wire connector. 1 being a power and one is going to be a ground, the ground wire is the one that send the signal to the PCM to turn on the fan. Depending on your wiring from EFAN you would need splice into the signal wire from the PCM to the fan.
98 Ranger, Bagged 2600's in the front, 2500's in the rear. 3 Gal tank. DJM Upper and Lower control arms. 2 Thomas Compressors (garbage). 4 linked rear with C-notch. All (except cab) fiberglass. Custom Tribal Paint (soon to be Sunburst/burnt Orange).
Coming soon - 405HP 4.6L (SOHC), 4R70W