| Author | Message | |||
     Geoff Wootton Grand Master Username: dounraey Post Number: 1240 Registered: 5-2012 |
Hi Folks I am trying to break in to the park off screen switch on my windscreen wiper motor. It is definitely faulty. It is made from nylon. Has anyone ever tried to open one of these, or something similar? I am using a stanley blade on the inner edges of the L shaped rectangular part of the switch. Would a dremel with a circular saw attachment be better? I have looked on the web but there appears to be no company supplying these parts. A replacement wiper motor is around 400 bucks, so I would rather try and repair/replace this switch as the rest of the unit is ok.  I did see a similar switch on ebay for $29 but it was for a jaguar wiper. It did not appear to have the same slots for the small bolts as on the Lucas 16W unit. Apart from this, I have had no luck in locating a replacement switch. Geoff | |||
| Paul Yorke Grand Master Username: paul_yorke Post Number: 1529 Registered: 6-2006 |
Hi Geoff, the bottom rectangle should prise out. Inside the contacts are moulded into the plastic so tricky to do much with apart from a clean. Is the plastic pin coming all the way out? | |||
| Jeff McCarthy Grand Master Username: jefmac2003 Post Number: 463 Registered: 5-2007 |
Geoff, I just came across this question. Apologies for not posting earlier. The switches are available from several suppliers. They are listed in the "Maintain and Repair" article on the wiper motors. I'll post a PDF copy of the article later today. | |||
| Jeff McCarthy Grand Master Username: jefmac2003 Post Number: 464 Registered: 5-2007 |
Steve Hunt in the UK has some on ebay at the moment. Also try Replacement Parts in the US. http://www.ebay.co.uk/itm/LUCAS-29W-WIPER-MOTOR-PARKING-SWITCH-NEW-/321769604888 Also ANG parts UK http://www.angclassiccarparts.co.uk/home/reliant/reliant-scimitar/electrical/wiper-motor-parking-switch-reliant-scimitar-gte-se5-se5a-se6-se6a | |||
| Jeff McCarthy Grand Master Username: jefmac2003 Post Number: 465 Registered: 5-2007 |
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| Geoff Wootton Grand Master Username: dounraey Post Number: 1296 Registered: 5-2012 |
Hi Jeff Thanks for your reply. Current state of play is I had to re-install the wiper motor without the reverse function as I am preparing for a house move. The car carrier picks the Rolls up this Wednesday. I intend to re-visit this problem as soon as we have sorted our new abode. I did carry out some extensive web searches when I was trying to restore full wiper functionality but could not find a slot in replacement. I have, this evening, checked the links you have sent but find the switches are not the same. However, I will be looking to purchase one to see if I can modify it to fit. The pictures below both show the problem. Although the pics are from different suppliers I believe they are the same switch. Unfortunately they do not have the slotted ribs that are used to screw the switch to the wiper motor and allow adjustment.   Incidentally, I did carefully break into the original switch but found, as Paul predicted, it was beyond repair. Best Regards Geoff | |||
| Jeff McCarthy Grand Master Username: jefmac2003 Post Number: 466 Registered: 5-2007 |
Geoff, when you do the job email Steve Hunt with a photo of what you need. He repairs Lucas wiper motors almost exclusively and I've always found him willing to help. If he doesn't have what you need he might know who does. Failing that I may have a spare or two lying around. | |||
| Geoff Wootton Grand Master Username: dounraey Post Number: 1297 Registered: 5-2012 |
Jeff Just as soon as I have completed my house move I will do that. Thanks for your help. Geoff | |||
| Eva Harry New User Username: evaharry Post Number: 1 Registered: 08-2026 |
This mechanism trips a lot of people up because the two switches interact in a way that isn't obvious at first. The off-screen park position isn't controlled directly, it's actually a side effect of how much travel is left on the cam when the motor reverses. So if you move the on-screen park switch even slightly toward the bulkhead, it changes the off-screen position too, usually earlier, even though you were only trying to adjust the on-screen stop. Small movements matter a lot here, something like 1/16 to 1/8 inch on the switch position makes a noticeable difference, so it's worth adjusting in tiny increments and testing rather than guessing at a bigger move and having to walk it back. Also worth checking the arms haven't been reseated slightly off the pivot spline at some point, since that throws off the whole geometry independently of the switch settings and gets mistaken for a switch fault when it's actually just arm position. |
