92 240 GL Wipers not parking, intermittent not working

  • Thread starter Thread starter James Sassman
  • Start date Start date
J

James Sassman

This started a couple years back when the wipers were frozen down and I hit
the switch not realizing that.
Now, no intermittent and they do not park.

Is this built into the motor--as a forum member on the internet someplace
said--or is this built into the motor?

Thanks!
 
James Sassman said:
This started a couple years back when the wipers were frozen down and I
hit the switch not realizing that.
Now, no intermittent and they do not park.

Is this built into the motor--as a forum member on the internet someplace
said--or is this built into the motor?

Thanks!
Click to expand...

Park is built into the motor, the contacts are under the cover on the
gearbox. The intermittant is handled by an electronic relay tucked under the
dash somewhere.
 
James said:
Park is built into the motor, the contacts are under the cover on the
gearbox. The intermittant is handled by an electronic relay tucked under the
dash somewhere.
Click to expand...
What do you have instead of intermittent wiper, nothing? or little blips
of wiper motion every few seconds?
The relay referred to by James above, does intermittent by giving the
wiper motor a little 'kick', after which the park switch in the motor
takes over, feeding a positive supply to the motor until it parks after
it's swept the windscreen once, ready for the next little kick.
I don't have my 240 car, or manual any more, so I can't help much with
which fuses and wires carry the necessary ign +ve's to the intermittent
relay and the wiper motor park switch.
You said that intermittent ceased to work after you stalled the wiper
motor in cold weather, how possible is it that a fuse has failed due to
the high current it would have drawn? This would necessarily affect the
normal wiper function.
I know that the headlamp wiper motors, the door lock motors and window
winder motors, all had positive temperature coefficient disks to protect
them and the cabling from high stall currents, I don't think the
windscreen wiper motor did have a PTC though, meaning that if stalled it
will draw a large constant current.
BTW ISTR that the park switch works really strangely, when parked the
motor is effectively shorted (via a diode?), which means that it stops
dead, just when it should, instead of coasting round a bit more due to
inertia, as it would do if the +ve supply was merely disconnected.

Ken Phillips
 
Ken said:
What do you have instead of intermittent wiper, nothing? or little blips
of wiper motion every few seconds?
The relay referred to by James above, does intermittent by giving the
wiper motor a little 'kick', after which the park switch in the motor
takes over, feeding a positive supply to the motor until it parks after
it's swept the windscreen once, ready for the next little kick.
I don't have my 240 car, or manual any more, so I can't help much with
which fuses and wires carry the necessary ign +ve's to the intermittent
relay and the wiper motor park switch.
You said that intermittent ceased to work after you stalled the wiper
motor in cold weather, how possible is it that a fuse has failed due to
the high current it would have drawn? This would necessarily affect the
normal wiper function.
Click to expand...
Oops sorry, I meant to write 'This wouldn't necessarily affect the
normal wiper function.' here.
 
I know this is silly but the arm isnt loose on the shaft from the strain is
it? My sons came loose and all I did was tighten the nut a little when it
was in its proper place.
 
John Robertson said:
I know this is silly but the arm isnt loose on the shaft from the strain is
it? My sons came loose and all I did was tighten the nut a little when it
was in its proper place.
Click to expand...
This did happen once a while back and I did the same thing: tightened the
nut after moving the arm to the proper position.

Thanks for your suggestion and help!

Jim
 
Ken Phillips said:
What do you have instead of intermittent wiper, nothing? or little blips
of wiper motion every few seconds?
The relay referred to by James above, does intermittent by giving the
wiper motor a little 'kick', after which the park switch in the motor
takes over, feeding a positive supply to the motor until it parks after
it's swept the windscreen once, ready for the next little kick.
I don't have my 240 car, or manual any more, so I can't help much with
which fuses and wires carry the necessary ign +ve's to the intermittent
relay and the wiper motor park switch.
You said that intermittent ceased to work after you stalled the wiper
motor in cold weather, how possible is it that a fuse has failed due to
the high current it would have drawn? This would necessarily affect the
normal wiper function.
I know that the headlamp wiper motors, the door lock motors and window
winder motors, all had positive temperature coefficient disks to protect
them and the cabling from high stall currents, I don't think the
windscreen wiper motor did have a PTC though, meaning that if stalled it
will draw a large constant current.
BTW ISTR that the park switch works really strangely, when parked the
motor is effectively shorted (via a diode?), which means that it stops
dead, just when it should, instead of coasting round a bit more due to
inertia, as it would do if the +ve supply was merely disconnected.

Ken Phillips
Click to expand...

There's no fuse failure as I've recently checked all of them.
The actual behavior of the intermittent is as follows: when moving the wiper
lever to the intermittent position, the wipers raise to about 2/3's or 3/4's
of the normal arc and stop. Moving the wiper lever to the low speed wiping
position initiates a continuted sweeping action to the top and back
downward--but never to the parking positon.

Since, from other replys to the group and your information, it seems the
intermittent actions are shared by the relay and the motor. I plan to
replace both since Ebay has a number of them available. I'm just debating
new or used but will probably go with new.

Thanks for your help!
 
There's no fuse failure as I've recently checked all of them.
The actual behavior of the intermittent is as follows: when moving the
wiper lever to the intermittent position, the wipers raise to about 2/3's
or 3/4's of the normal arc and stop. Moving the wiper lever to the low
speed wiping position initiates a continuted sweeping action to the top
and back downward--but never to the parking positon.

Since, from other replys to the group and your information, it seems the
intermittent actions are shared by the relay and the motor. I plan to
replace both since Ebay has a number of them available. I'm just debating
new or used but will probably go with new.

Thanks for your help!
Click to expand...

Sounds like the motor is at fault, look at that first, don't bother
replacing the relay unless it's still malfunctioning.
 
James Sweet said:
Sounds like the motor is at fault, look at that first, don't bother
replacing the relay unless it's still malfunctioning.
Click to expand...

Ordered a new, after-market wiper motor on Ebay today: $44.90 including
shipping and looks, according to the picture, exactly like one on Ebay that
was $69.90. Am hoping this works to correct the annoying problem!

Thanks, everyone!

--Jim
 
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