heater/ac blower fan on 2002 Dodge Ram Van 1500

Fan does not come on no matter what position the switch is on. Worked well after relay was replace several months ago, then stopp again. What are some of the possibilities and where do I find diagrams such as where the fan motor is. Thanks, Joe Rosinski

by in Brunswick, OH on September 20, 2010
1 answer 1 comment
ANSWER by on September 21, 2010
First, check all fuses under the instrument panel and under the hood in the Power Distribution Center. Power to the blower motor is via the ignition switch, through the A/C heater control and the resistor block to ground. The resistor block is a place to start as it is easy to replace and the part is not expensive. The blower motor may also be defective. This is easily checked by disconnecting the blower motor wiring connector and applying 12volts to the motor lead and grounding the remaining wire. Positive to the Green Wire.
COMMENT by on March 08, 2013
I am having the exact same problem with my 02 dodge ram 1500 2wd. We replaced new blower motor and resistor, it was working fine and suddenly it stops blowing air? what maybe the problem???