Ongoing wipers?

[TONYELF]

The day after using the wipers most of the way home fron Sandon Hall Show (during which they behaved perfectly) I switched them on to clear the screen to go to work. Now they won't switch off!!!!!!!!!!
Anyone had this trouble themselves? If so what did you do? Help!:mad: :mad: :confused:

[Iceman]

mine are the same m8ey :) by not clicking the stalk back into off and just by gently very slowly bringing it down towards off and holding it just before it clicks off mine stop! another unique feature i say ;)

[TONYELF]

Tried them again today and they were fine so had a bit of time to looksee why wiper would not cancel since I fitted the bracket to lower the steering wheel. It now transpires after removing the cowl off the column that the single screw clamping the wiper and indicator stalks was not tight enough as the plastic clamp was broken. Now looking for complete replacement unit.Can anyone oblige ?:eek:

[RSP]

Tried them again today and they were fine so had a bit of time to looksee why wiper would not cancel since I fitted the bracket to lower the steering wheel. It now transpires after removing the cowl off the column that the single screw clamping the wiper and indicator stalks was not tight enough as the plastic clamp was broken. Now looking for complete replacement unit.Can anyone oblige ?:eek:
Sorry to hear that, sadly I do not have one. Good luck with the search.

[TONYELF]

I have now got hold of a replacement stalk control plate and temporarily connected it up. indicators work ok but wipers will not switch off at all.two speeds are ok but as I said before they won't switch off. Maybe theres a short in the motor? or is coincidental I've got two faulty switches?:confused:

[Gr4H4m]

is there anything inline from the arm to the motor?

[RSP]

Sorry I can not help, I hate mini electrics!!!!

But I feel your pain!!!

[TONYELF]

Sorry I can not help, I hate mini electrics!!!!

But I feel your pain!!!

Do you mean pane (as in glass?) LOL:D

I don't like any 12 volt electrics, just hate the lack of space to work on em!

[TONYELF]

is there anything inline from the arm to the motor?

Looking at the Haynes bible. The fault diagnosis list, three of the faults give internal motor fault. Thinking back, there used to be a problem trying to get them to park at bottom of screen. this makes me wonder if this is one of the probs. Does any one know if there is a relay involved at all?

[RSP]

Looking at the Haynes bible. The fault diagnosis list, three of the faults give internal motor fault. Thinking back, there used to be a problem trying to get them to park at bottom of screen. this makes me wonder if this is one of the probs. Does any one know if there is a relay involved at all?
You are getting a bit (bite) out of hand with the spelling Elf. LOL

Or is it just the christmas craker jokes coming early!! LOL

[RSP]

ment to quote from other message!!!

Still getting to grips with this thing. LOL

[Cooper D]

You are getting a bit (bite) out of hand with the spelling Elf. LOL

Or is it just the christmas craker jokes coming early!! LOL

Wish he was, his jokes are this bad all the time, they just worsen at xmas!

[TONYELF]

is there anything inline from the arm to the motor?

What exactly do you mean ? If you meant fuse and its bust then would the wipers still operate?.
The more I think about it, the damn things would not park at bottom of screen before this started and this makes me think it could be a short or a fault somewhere in the motor,(as suggested in the bible):confused:
I'm starting to get my own wires crossed now, if you pardon the pun!

RSP, what's a Craker?

[RSP]

It is a cracker with a bad joke in it!!!LOL

We need an RSP spell check on this thing!!!!

[Steve]

Hi Tony this may help.

Wiper connections


Parking motors have a red/light green, brown/light green, blue/light green and black wire, light green/orange (5 in total) coming out of the plastic push connector, (black earth, light green/orange permanent ign. fed line, blue/light green single sweep, red/light green slow, brown/light green fast)

1 Earth,
2 trigger for single sweep,
3 trigger for slow,
4 trigger for fast
5 live feed to keep the motor going until the wipers have parked

The park switch is connected by a light-green orange wire from fuse box
terminal 6 (ignition fed) and feeds 12v to the wiper motor so long as the plunger is pushed in(?)
The red light-green wire feeds 12v with a resistor in the main supply lead for slow (I) or..

The Brown light-green wire feeds 12v to the motor for fast speed (II) via a series resistor in the shunt.

I think the mini wiper motor is a permanent magnet motor thus.....

When you turn the wipers off the park switch (in position A) puts power thru to the motor until the switch drops off the track in the plastic cog then the motor has enough momentum to run on until the park switch is set to earth out the motor (position B)...

So the park switch not only disconnects the power to the motor when it is reaching park position but also shorts out the armature of the motor at the same time forcing a current to flow out of the armature, this power is derived from the rotational energy of the armature causing the motor to rapidly decelerate to a standstill

The single wipe switch position can be checked with a multimeter - it keeps the motor winding energised as long as it is depressed - the park (+) feed is independent of any of the functions of the wiper switch on the steering column

There seems to be a wire missing in the mini setup against the classic park and on/off switching set up for a permanent magnet wiper motor - this suggests an earth is established within the body of the park switch from the normally (+) side of the motor when the wipers are at park to stop them dead.


Wipers, Self-parking modification


Coming out of the motor (not the park switch) are 3 wires.

Blue - Ground
Red - Slow
Yellow - Fast

These connect on to the back of the park switch and go straight through up to the wiper switch. This leaves 2 wires that come out of the park switch.The actual park switch is basically a change over relay. when the pin is pushed down by the cam on the back of the wiper cog. it switches (not the light green/orange stripe the only one that is left) from the permanent 12V to 0V this shorts the motor out and stops it very quickly. If the motor doesn't stop then this contact is the one that needs attention. When the pin is up (when the wipers are not parked) this lead is connected to the Light green/orange stripe which is the permanent 12V this makes the wipers park when the wiper switch is off.

TO REPAIR PARK SWITCH.
If your wipers either keep going or don't park when switched off then your park switch needs attention. First remove wiper motor from car as described by haynes. Dismantle as per haynes. The bit Hynes doesn't tell you is that there is a small metal clip that attaches the park switch to the motor It is probably hidden under all that grease but if you clean out the motor first you will find it. Slide the clip back and the park switch should come away from the motor. Now you have a choice, you can either go out and buy a new one or take it apart and clean up the contacts. The problem with taking it apart is that you brake it there are small plastic tabs which brake when you open it up.

IMPROVEMENT.
This will be done shortly to my system. Fit a changeover relay in the park switch circuit so that when the wipers aren't parked the coil in energised and connects o/p from the park switch to 12V unenergised connection of the relay is connected to 0V this takes the load off of the park switch so it will last longer. Once this has been done swap the yellow and Red wires over on the back of the park switch this will give you Fast speed auto park, once wipe and swap the fast and slow on the wiper switch. Well worth doing I think I have been running a similar set-up which works really well. I put the relay in a different place which means that I cannot use slow speed anymore I will convert to the above method when I get some time.

Suspect a lack of lubrication in the coiled flexible wire running between wipers and motor and the drive boxes between wiper and drive wire. Remove the wipers, undo the locking nut around the wiper splined mounting, push the assembly out under the wiper panel, clean out he tubes, grease them and the gear boxes, extract the flexible wire that runs down thetube to the motor, clean that, grease everything and... THEN if it doesn't work think about the bushes. BTW does the motor run with the wipers lifted off the screen?



Wipers, won't park

Problem: Mainly the wiper motor wont park in the correct place.

"it parks, but in the wrong place"

pull out the park switch and see if either the plunger end is worn and/or a track has worn in the cog it rides on. Remove, clean and replace all connections as required.

"if you use the speeds (1 and 2) it works fine. when you knock the lever to the off position, it parks itself where-ever it is"

The park switch is shot.

"is this that famous parking contact that wears out/corrodes or whatever? how easy is it to sort out?"

Pretty simple.. pull the switch out, see if it works when connected but with you playing with it. :)

[TONYELF]

Thanks for that Steve! NOW I have got my wires crossed ! LOL
I will have to print that off and use it as a tick list.
I have had the switch off and it dismantled itself, the large return spring for the "one touch/wipe" shot off. the small contact on the end of the spring shot off as did the plastic stopper (which stops the contact slipping inside the spring) I went bananas (which I am anyway!) trying to balance it to get back so in end superglued the contact onto the plastic then the plastic onto the spring and after two attempts got it in but the big return spring? NO CHANCE ! so left that out now I have 2 speed wipers and an off position but no single wipe but at least I can turn em off!
Will have a go next time I've got a FULL day off LOL If I have any probs maybe I'll give you a visit? :D
Thanks again for the info:) :confused:
I looked at Phil's studio 2 and the spring is missing out of that too!!!

[Steve]

Any time tony, glad you have got them to start and stop, so you can use the car the rain.If you need any info let me know.

[Deano]

Ive remember my wipers going crazy once due to the wire`s being badly corroded where it plugs into the wiper motor:confused:

[Steve]

Ive remember my wipers going crazy once due to the wire`s being badly corroded where it plugs into the wiper motor:confused:

A commom thing to happen on early 90s cars. The wiper can get so bably corroded, it then stops working altogether.

[TONYELF]

That maybe the problem I can't even get the plug off the motor at the moment?

[TONYELF]

The damn wipers played up again last week. Changed the parking switch (curtesy of Denty) and managed to turn them off but still would not park.
Spotted a new switch at Himley £6.50 so took a chance. It worked!!
All smiles now :) :) :) :) :)