ram van 1500- probley the same with other full size vans.</P>


if you have only high blower speed for heat- chances are the heater resister block in the box is bad. The unit has a thermo diode in series with the resistors that grounds out the motor.</P>


the high speed is controlled by a different relay in the engine pdc.</P>


may also be a bad dash blower switch- but this thermo diode is like the one in a hair dryer- once they over heat- their done!!!!!</P>


John</P><edited><editID>71_deputy</editID><editDate>38013.845</editDate></edited>

 

keep in mind the wirring circuit for the chrysler vans has an over load bypass allowing you to still use the the heat and A/c as mentioned in the previous message the cause is a faulty blower motor resistor if not then your wiring is bad these circuits are simplistic in design and extremely easy to diagnose Caravansasleepr