Hi Folks,
I'm working on my LHD '88 that has an wiper assembly that parks the wipers on the passenger side (for RHD). Does anyone know how to delete the "park" feature from the wiring...I'm fine with re-setting the wipers to sweep the driver side and park them with controlling the switch. Save a lot of leaning over in the rain....
Thanks,
Seann

 

I'm curious, if someone changed the wiper motor? Or how it came to be that they park on the wrong side??? Could it be the arm on the wiper motor, is clocked 180 degrees off? I don't know if that's possible, as I have yet to mess with the wipers on mine. But I've had that happen on other cars, and it might save messing with the wiring, which is never a good thing. Just my thoughts.

Jack

 

If you open up the wiper motor I'm sure there's a 'park switch' in there somewhere. As a rule they operate by applying voltage for one revolution after the driver's switch has been turned 'off'. Look for a switch that actuates based on rotation....that'll probably be the one. You could try defeating it and see what happens. Not sure if there would be any unintended consequences

Cheers
DD

 

I haven't studied the wiring diagram for that car yet but typically, the Park function is powered by a separate power source than the on-off there fore there should be one wire that continues to be "hot". Not Hot in the same sense of always hot when the key is not turned, but a separate source to power the Park circuit separate from your stalk switch. Just need to find which wire that is and maybe easiest to modify something on the plug going to the wiper motor.

 

Do you have the Lucas wheelbox system, or the later Electrolux 4 lever system?

 

Thanks for suggestions, I'll sort this out and post results. When I first got the car I thought it was a bit of a strange setup, but if you look at images of these cars, you'll see that several are "backwards" seemingly at random. If there was a "right" and a "left" assembly at the factory, surely we could hope that they were match installed in R or LHD cars...but maybe they ran out of one near the end....? Since the wiper posts are centered (not favouring left or right), you'd think it could be "set" for either side. My system is the Lucas one, and it has markings on it that look like wrecking yard paint. Hmmm....
Seann

 

Sean
Believe it or not there is absolutely no detectable rhyme or reason to whether the wipers park on the LHS or RHS, there is no consistency across year, model, or steering wheel location!


The Lucas system has a rather complex parking mechanism inside the gearbox actuator attached to the motor. When you switch off the wipers in the cabin, the motor keeps turning as an auxiliary feed keeps activated until a small metal part runs up a spiral track; at the end of which spiral this small part switches off the current via a sprung loaded plunger which is part of a clip-on part on the side of the motor/gearbox unit which looks like this:

That rounded ended thing sticking up is the plunger switch that stops the motor when the track-end is reached. You will have to remove the wiper system from the well; but I reckon if you fiddle about you will be able to de-activate the park system, either by removing a feed wire or bypassing the park plunger all together somehow. But beware, as wired OEM, if the plunger is not allowed to spring upward, the wipers will not work at all! I bought a NOS wiper motor cheap because it would not run, and the reason was the spring on the plunger had broken.

 

Interesting, my '88 (US) doesn't do this. Wonder if it depends on how far into production or whether it depends on the market.

 

The wipers on XJSs can be either left or right parking versions regardless of the market or year. There is no apparent pattern to this interesting design choice.

Are you planning to relocate the arms on the spindles to make them start ( from parked ) on the far side of the window when they are really at the full extent of their stroke?

EDIT:
I don't know if this is actually helpful to anyone, but here's my animated electrical diagram of the wiper system in intermittent mode. I believe that if you remove the park switch from the circuit the wipers won't work. Physically removing the switch from the housing would do though.

 

Took motor apart and removed ramp/disc (pictured) from behind gear and tested...park disabled. Re-positioned arms to park on driver (left) side, and bent arms so blades actually sit horizontal when parked (with switch). Problem solved, thanks to all,
Seann

 

Sean
So just removing the metal thingy in your photo did it? no other wires etc to be changed? And does the intermittent and the flick wipe still work OK? As the park works on mine but is dreadfully clunky, I would not mind making it a manual stop at all, as long as I do not lose those other two features.

 

Will check those functions this weekend and report.

 

All other functions seem to work fine, thanks for the tip...I didn't even know this car had a delay setting! Is the delay adjustable? This one has a VERY short pause. On to the leaking rear caliper...

 

No, the delay is not adjustable unless you change the delay relay itself.