You cannot discount that the heater control uni t is bad. However once the key is turned off, no power should be going to the blower control switch.
There are 2 blower relays that could be involved.
One relay draws its power directly from the fuse block
( Fuse #5D-25amp.) This power from this relay goes directly into the heater controls assembly.
The other one takes its power out of the heater control assembly and is directly tied into the blower motor. It is the high speed relay. Does the fan work only on high mode when this happens?
It is possible one or the other of these relsys is stuck on. Other wise you may have 2 wires shorted across each other keeping the system hot.
Far fetched woul be the ignition switch failing and not canceling power to the accessories.
Monday, March 17th, 2008 AT 12:05 PM
