Hi there my wife has a 2003 grand cherokee and yesterday when she was driving the heat would slow down and speed back up. today the heater stoped blowing air all together. I hooked up a battery to the blower motor and it ran fine. so i thought that i would try to plug it back in and it worked fine on all speed. It worked for about 4 hrs and stopped working again. Any ideas. We have a 5 month old baby and it our only vehicle to take him places. please help

 

Check the connection on the blower resistor for corroaded or melted terminals. Sounds like the blower resistor is failing or failed

back probe the brown and green wire to a good ground, if the blower motor runs then the "blower speed control" is bad

 

where are these wires you speak of? I just bought a 94 ZJ and the blower motor doesnt work. Are there any wiring diagrams online?

 

Hey Toy, did you try jumping out the blower motor to see if it works?

 

I just replaced the resistor in my 95 - its under the glove box kinda to the right of the heater box. ITs really expensive - I pulled one from a salvage yard for $5 they are 169 new or atleast thats what the dealership told me

 

is this the right one
http://www.jeeperz-creeperz.com/heat...r-p-64333.html

 

I bought a resistor but now I need to know where it is in the dash. I was reading in someones post that it is to the right of the blower motor?? I tried to find some pictures or direction o using google and came up with nothing.