As RichLo said it's probably bad solder joints. The wiper motor circuit board is somewhat notorious for this and almost surely what was wrong with your original wiper motor. The solder joints that connect the harness socket to the circuit board are what fail; the one closest to the edge generally fails first and it's the ground. A simple re-touching of the solder on those joints (a little fresh solder helps get it going) fixes -most- of the wiper failures on these trucks. Disconnect the harness, three torx screws on the cover, circuit board pops out for the job, re-assemble.. takes less than 30 minutes from hood open to hood closed.
The only "gotcha" here is you say you replaced the motor not that long ago. With what.. a used one? Then yes, definitely the solder joints are the suspect. With a new one? Might just be crap quality of new parts.
Richard
As RichLo said it's probably bad solder joints. The wiper motor circuit board is somewhat notorious for this and almost surely what was wrong with your original wiper motor. The solder joints that connect the harness socket to the circuit board are what fail; the one closest to the edge generally fails first and it's the ground. A simple re-touching of the solder on those joints (a little fresh solder helps get it going) fixes -most- of the wiper failures on these trucks. Disconnect the harness, three torx screws on the cover, circuit board pops out for the job, re-assemble.. takes less than 30 minutes from hood open to hood closed.
The only "gotcha" here is you say you replaced the motor not that long ago. With what.. a used one? Then yes, definitely the solder joints are the suspect. With a new one? Might just be crap quality of new parts.
Richard
It was a new motor, WAI global off rockauto.. def chinese.