I'd like the schematic also (97 Ram 1500 2wd). I saw there was a recall (today) to add a relay off of the parking brake and I've seen it there, but I haven't checked it (tonight maybe).
I've replaced the blower motor resistor (it was a little off but probably not bad) and checked the voltage (Hayne's says green but mine is coming in on the orange wire to the motor) to the motor and it's fine, but the ground isn't getting connected to the motor. (Less than 0.5V read between the +/- on the wires to the motor, but full 13+V when I use a door hinge bolt as ground) The backwards wiring makes a lot of sense.
I've checked the control switch pin continuity and they vary with the setting, so that seems fine (but no wiring info on what the pins on the control do). I have full voltage between the bottom wire and some of the others. The vacuum lines are good, no leaks, suprisingly.
Where is the ground connection that the blower motor circuit would use? I applied CAIG DeOxit D5 (amazing stuff) to the ground connections I could find under the hood and cleaned up most connections if they looked rusty/oxidized but I feel like there is a broken ground connection. Because it stopped working intermittently and then later stopped completely, I feel like it's a connection somewhere.
Any tips would be appreciated.
Friday, February 19th, 2010 AT 9:37 AM