on most vehicles the fan resistor/heater coil/ect is located under/near the glovebox.
a bad one will usually only work on low speed....search the net for info-- their expensive sometimes, and theres lots of info on how to rebuild them yourself.
Incorrect, a bad resistor block should fail to where it only works on high speed. This is a failsafe measure. If it stops working all together check the motor first along with the fuse.
Big Red, '99 Golden Eagle TJ, Total 6.25" RE, 1" Body, 4.0+Turbo City2, AX15+Hurst, 231+4LO+RE Whack&Tap, D30+ABR+4.56, D44+Detroit+4.56, 37x12.50 GY MTR, Yes, they rub all over, I like it that way.
'93 YJ, 2.5, 5 spd, shackle lift, 31" Boggers, 4.88, Lock Right ina rear, True Track ina front, known as "Lenny." Built by the five handed monkey that lives under the stairs, with lots of used parts
When your Jeep is lifted, generaly, it will NOT drive like it used to.