129 Guests, 1 User
AV80R

Author Topic: Wiper motor  (Read 1182 times)

0 Members and 1 Guest are viewing this topic.

Offline Jdm071755

  • Pinto Full Member
  • ***
  • Posts: 163
  • FeedBack: +24/-0
  • Gender: Male
  • Another Pinto Driver

  • Total Badges: 3
    Badges: (View All)
    Topic Starter Signature Mobile User
Wiper motor
« on: December 09, 2017, 02:45:29 PM »
Wipers donít work. Pulled the motor out I tried to turn it by hand boy it doesnít budge. Should it spin freely by hand?


Sent from my iPhone using Tapatalk
Joe

Offline Wittsend

  • Pinto Master
  • *****
  • Posts: 2038
  • FeedBack: +239/-0

  • Total Badges: 8
    Badges: (View All)
    Tenth year Anniversary Mobile User Topic Starter Poll Voter 1000 Posts Linux User Windows User Fifth year Anniversary
Re: Wiper motor
« Reply #1 on: December 09, 2017, 03:32:31 PM »
Usually they have a worn gear drive so, "No" it most likely wouldn't turn.  Often times the grease in the gear box can harden to the point that the motor won't turn, or if left on long enough burn up the motor. Electrical contacts can get corroded too. Did you check the fuse?

1. Check the fuse.

2A. Put a volt meter on the connector. You can just run it to chassis ground on the - side. Turn on the wiper at each position and then look for voltage on each connection point. You should only find voltage at one point per switch position (other than off*). The one where you find no voltage after going through each position is likely ground.  *You may find one wire that has voltage all the time as something like that is needed to get the wipers back to the "park" position.

2B.  You can set a voltmeter to Ohms and check for continuity on the motor. Unfortunately I have no idea what to expect to read at any given connector. So, it can be a bit of guessing what thereadings mean. Maybe others are more versed on that.

3. Assuming you have voltage at the connector you might want to open the gearbox case and look at the condition of the grease. There are often wipe tracks of copper on a circular board and any corrosion, hardened grease etc. can disrupt electrical contact.

So, that should get you started.

Offline Jdm071755

  • Pinto Full Member
  • ***
  • Posts: 163
  • FeedBack: +24/-0
  • Gender: Male
  • Another Pinto Driver

  • Total Badges: 3
    Badges: (View All)
    Topic Starter Signature Mobile User
Re: Wiper motor
« Reply #2 on: December 19, 2017, 01:58:11 PM »
Usually they have a worn gear drive so, "No" it most likely wouldn't turn.  Often times the grease in the gear box can harden to the point that the motor won't turn, or if left on long enough burn up the motor. Electrical contacts can get corroded too. Did you check the fuse?

1. Check the fuse.

2A. Put a volt meter on the connector. You can just run it to chassis ground on the - side. Turn on the wiper at each position and then look for voltage on each connection point. You should only find voltage at one point per switch position (other than off*). The one where you find no voltage after going through each position is likely ground.  *You may find one wire that has voltage all the time as something like that is needed to get the wipers back to the "park" position.

2B.  You can set a voltmeter to Ohms and check for continuity on the motor. Unfortunately I have no idea what to expect to read at any given connector. So, it can be a bit of guessing what thereadings mean. Maybe others are more versed on that.

3. Assuming you have voltage at the connector you might want to open the gearbox case and look at the condition of the grease. There are often wipe tracks of copper on a circular board and any corrosion, hardened grease etc. can disrupt electrical contact.

So, that should get you started.
Ok now that the brakes are done on to wiper motor. Look at the picture closely someone spliced 2 wires together. Red to black and black to red.  Donít seem right


Sent from my iPhone using Tapatalk
Joe

Offline pintosopher

  • 33yrs SCCA, 19yrs Egroups/PCCA ,40yrs enlightenment
  • PCCA Charter Member
  • Pinto Master
  • *
  • Posts: 1974
  • FeedBack: +383/-1
  • Gender: Male
  • Essses my Nirvana , Liberty to play, my mission

  • Total Badges: 8
    Badges: (View All)
    Topic Starter Signature Poll Voter 1000 Posts Windows User Tenth year Anniversary Fifth year Anniversary Photographer
Re: Wiper motor
« Reply #3 on: December 19, 2017, 02:25:39 PM »
What year is your car? 72 & 73 have dark brown /orange , Red, white, Black /pink to motor The splices could have been a intermittent relay spliced in the past.
Yes, it is possible to study and become a master of Pintosophy.. Not a religion , nothing less than a life quest for non conformity and rational thought. What Horse did you ride in on?

Check my Pinto Poems out...

Offline Jdm071755

  • Pinto Full Member
  • ***
  • Posts: 163
  • FeedBack: +24/-0
  • Gender: Male
  • Another Pinto Driver

  • Total Badges: 3
    Badges: (View All)
    Topic Starter Signature Mobile User
Re: Wiper motor
« Reply #4 on: December 19, 2017, 02:54:12 PM »
What year is your car? 72 & 73 have dark brown /orange , Red, white, Black /pink to motor The splices could have been a intermittent relay spliced in the past.
80 cruising wagon


Sent from my iPhone using Tapatalk
Joe

Offline pintosopher

  • 33yrs SCCA, 19yrs Egroups/PCCA ,40yrs enlightenment
  • PCCA Charter Member
  • Pinto Master
  • *
  • Posts: 1974
  • FeedBack: +383/-1
  • Gender: Male
  • Essses my Nirvana , Liberty to play, my mission

  • Total Badges: 8
    Badges: (View All)
    Topic Starter Signature Poll Voter 1000 Posts Windows User Tenth year Anniversary Fifth year Anniversary Photographer
Re: Wiper motor
« Reply #5 on: December 19, 2017, 04:11:48 PM »
Same colors for 1980 in my Clymer Manual at the Motor Connector plug. Sounds like an attempt to get a feature on the factory intermittent to work when it failed.
Yes, it is possible to study and become a master of Pintosophy.. Not a religion , nothing less than a life quest for non conformity and rational thought. What Horse did you ride in on?

Check my Pinto Poems out...

Offline Jdm071755

  • Pinto Full Member
  • ***
  • Posts: 163
  • FeedBack: +24/-0
  • Gender: Male
  • Another Pinto Driver

  • Total Badges: 3
    Badges: (View All)
    Topic Starter Signature Mobile User
Re: Wiper motor
« Reply #6 on: December 19, 2017, 05:08:37 PM »
Same colors for 1980 in my Clymer Manual at the Motor Connector plug. Sounds like an attempt to get a feature on the factory intermittent to work when it failed.
Iím going to put them back to red/red black/black and see what happens


Sent from my iPhone using Tapatalk
Joe

Offline Reeves1

  • Pinto Master
  • *****
  • Posts: 1932
  • FeedBack: +104/-0
  • Gender: Male
  • BAWS302

  • Total Badges: 5
    Badges: (View All)
    Topic Starter Signature Fifth year Anniversary Windows User 1000 Posts
Re: Wiper motor
« Reply #7 on: December 21, 2017, 05:13:22 PM »
Let us know.
Every day I keep meaning to go hand test one I have in the shop & keep forgetting.... .

Offline Wittsend

  • Pinto Master
  • *****
  • Posts: 2038
  • FeedBack: +239/-0

  • Total Badges: 8
    Badges: (View All)
    Tenth year Anniversary Mobile User Topic Starter Poll Voter 1000 Posts Linux User Windows User Fifth year Anniversary
Re: Wiper motor
« Reply #8 on: December 22, 2017, 11:23:49 AM »
If you are unsure about wire connection it would be prudent to use an in-line fuse holder (fuse rated to the wiper motor) so if the connection resulted in a short you have a form of protection.