Please understand, I have a very basic knowledge of electricity.

I have a 2000 Dodge Ram 2500 Laramie SLT 24-Valve L6 Turbo Diesel. Started my truck one morning recently, and NO action from my wiper switch. Fuse under dash is good. Tested 12v at that location successfully. Relay tested out perfectly according to service manual, both powered and un-powered. Concluded problem must be switch or motor itself.

Decided to test motor. From what I've read, the most definitive way to test motor is to pull it out and hook it directly to my battery. Tried that, and I'm getting nothing. Unless I'm doing something wrong.

Here's what I have:


So you can see it's a 4-pin connector. with a separate 5th connector which is my ground.

So looking at the connector in the picture the 4 wires are as follows from left to right:
Brown/White (Low Speed)
Blue (Accessory)
Green (Wiper-Park/Relay)
Red/Yellow (High Speed)

I tried hooking the motors ground to both my chassis and negative battery terminal and putting 12v from the positive terminal to my High Speed and Low Speed pins and I'm getting no action at all. I have also simultaneously put 12v to the Accessory pin AND the High Speed/Low Speed pins respectively and and am getting absolutely no action either.

So is it safe to say that my motor is bad?

Also, with the motor not connected to anything testing continuity between my motor pins and the motor housing gives the following results:
Brown/White (Low Speed) --> .225
Blue (Accessory) --> No Reading
Green (Wiper-Park/Relay) --> .002
Red/Yellow (High Speed) --> .010

This doesn't seem right to me, as my High Speed pin has continuity with the motor housing, which is essentially grounded.

I'm thinking the motor must be finished. Anyone have any input on this? Any help would be greatly appreciated. I don't wanna go buy a new motor to discover this one was fine.

Thanks in advance.

 

Test the switch, if you are getting the right voltage to the right pins on the connector, then the motor is certainly toast.

 

It would seem that, yes, your motor is bad. Like HeyYou said, check your switch, just to be sure.
There seems to be a thermal cutout in the motor (labeled PTC on page 8w-53-3 in the manual). Just for giggles, crack open the motor and jumper that, see if the motor runs.

 

Thanks for the tips guys, but I ended up just replacing the motor and everything is working now. Cost about 65 dollars from O'Reily Auto Parts.

Wiper Delay does not work, but then again, it never did and I'm fine with that as I don't want to go anywhere near the CTM if I don't have to.