Fan blower motor does not turn on

Thank you for the response. I do not quite understand about Dodge electrical working backwards (may need to explain a little better). Any more information would be greatly appreciated.

Hello buddycraigg,

I have a problem with my truck's blower turning off when the headlight switch is turned on.

I saw there was a recall (today) to add a relay off of the parking brake and I have seen it there, but I have not checked it (tonight maybe).

I' have 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 is fine, but the ground is not getting connected to the motor. (Less than 0.5 volts read between the positive and negative on the wires to the motor, but full 13+ volts when I use a door hinge bolt as ground). The backwards wiring makes a lot of sense.

I have 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, surprisingly.

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 is a connection somewhere.

Any tips would be appreciated.

Thanks for the schematic. It was the relay, apparently. The relay is working but was not connecting somehow. I sprayed the connection with the Deoxit D5 and connected/reconnected it a few times and it has been working normally again. No more scraping the inside windows now!

1999 Dodge Ram 1500 4x4. AC started working intermittently. When it would blow it was ice cold and other times nothing. Changed the blower motor resistor and it was not that. Now air does not blow at all. Changed the ignition switch with no luck. When the dial is on AC you can put your hand up to the vent and feel cold air when you are driving (or heat if you put the dial to red) but only when the truck is in motion. Where can I find the schematics on this? Any help would be appreciated.

Hello! It was our blower motor. Got a new one today at the auto parts store (we bought the one with the fan cage included not just the motor). Simple, quick and inexpensive fix! Air is running again! Hope this helps someone else. Thank you for this thread as it sent us in the right direction! (Tip: I did an online search of our 3 local auto parts store before buying. Prices ranged from $47-$102 for the part. So if you are looking to save money take a few minutes to do this first.)