Windshild wippers

I have a 1979 Blazer, with intermitten wippers, the wippers will come on when Blazer is parked, not running with keys out. They will make a pass over windsheild and stop. There is no pattern to this. I have replaced the wipper motor assy, problem did not go away. Any help? Thanks Danny

Did you replace the wiper motor pulse board at the same time?

No I didn't, where would I find the board?
Thanks Danny

No I didn't, where would I find the board?
Thanks Danny

Right behind the flat plastic cover on front of the wiper motor.
3 torque screws holding cover on.
Did the mortor come with one it in it or did you use your old one in new motor?
MT

I think 79 used a separate intermittent wiper module under the dash near the fuse panel. Connected between the wiper switch and the motor.

The board was inside I assume, the instructions didn't say anything about changing it. The unit works as it should normally, it also runs when it should not. I knew the older models had the board inside them, I thought the knewer models had much smaller ones, and mabey they were included inside the off, on switch. Thanks Danny

I think 79 used a separate intermittent wiper module under the dash near the fuse panel. Connected between the wiper switch and the motor.

You may be right there Old Master.
I missed the 1979 part.
No pulse board in the motor on them.
A good repair book may help on it.
Some of them had a park setup in the wiper motor.
Is this a intermittent wiper motor or just a regular and does it have a windshield washer pump on motor?

I have the correct intermitten motor. I think we are on to the problem being the module under the dash. Thanks Danny:grinno: