13 replies to this topic

[Ol timer]

I have a never ending issue with the lack of parking with my wipers the outer casing of the wiper motor says lucas wiper motor 14W Park 75738J 

I have checked the connections, cleaned  the terminals in the loom and also replaced the park switch.

 

One thing I have noticed whilst surfing the net that most if not all Mini Wiper Motors I see seem to have 3 Wires coming out of the motor to the Park switch, this motor only has 2.

 

is it possible it isn't the right motor for the mini? 

 

[nicklouse]

Pictures of the wiper motor? The Mini had more than one. And some had more than 3 wires.....

[Ol timer]

Pictures attached

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[GraemeC]

Number of wires between motor and park switch will depend on whether it is a single speed or a two speed motor

[Ol timer]

So basically a 2 wire system will be a single speed wiper motor... Maybe the connections from the motor to the park switch are wrong?

Edited by Ol timer, 25 August 2018 - 05:56 PM.

[Bat]

Hi,

Is the green wire to the motor live when the ignition is on, without switching on the wipers?

Cheers 

[Ol timer]

Will check tomorrow and let you know Bat

[Ol timer]

Hi Bat, well I checked this morning and the GREEN wire from the loom plug to the wiper motor is earthed with the ignition on or off.
One thing that may be of interest is the Switch in the cabin for the heater is a simple toggle switch. 2 wires, on or off
 

Edited by Ol timer, 26 August 2018 - 10:00 AM.

[Bat]

Hi,

That green wire should have power on it when the ignition is on to power the motor so it can park the blades. It should come straight from the fuse box.

Cheers 

[Ol timer]

Thanks again Bat, I will buzz it out and see where it leads, in regards to powering the motor, the wipers do work so its getting another power source?

[Bat]

Hi,

Power comes from the switch for the individual speeds and when you switch off the green powers the motor via the park switch.

Cheers 

[Ol timer]

Buzzed the Green wire to the fuse box, this time I set my multimeter properly and I am getting 12v through the green wire through the loom to the park switch.

noticed the connections in the loom to the park switch were corroded so cleaned them with electrical contact cleaner. still no joy.

Maybe a faulty park switch.

[Ethel]

The motor's correct for a Mk3 with single speed wipers. You can use a 2 speed motor, with the 3 wires, if you need a replacement.

 

As above, there's an ignition live feed to the motor to power it between you turning the wipers off and them parking themselves.

 

Just ignore the blue/green 2 speed bit.

 

When you turn them off current flows up the B/LG from the 12v ignition live at the motor connector block, then back to the motor windings via the R/LG (that's also used when the wipers are on & supplied by the 12v at the driver's switch). When the wipers get to the park position the park switch cuts the supply at the motor and earths B/LG - both sides of the motor winding are now earthed and it stops dead. If the park switch didn't earth the motor could run on enough to reconnect the park switch to 12v and set the the wipers off on another lap....

 

So, if your wipers stop dead as soon as you flick the switch either there isn't a supply to the park switch or there's a break somewhere between it and R/LG terminal on the driver's switch. With the wipers off, continuity between the B/LG and R/LG connectors at the motor strongly suggests it's the park switch. It's not unusual for the little plastic plunger to wear down to the point where the contacts arc instead of earthing and burn out.

[Ol timer]

Thanks for the reply Ethel, I suspect and issue with the toggle switch...looking at the  wiring diagram above , if I am correct it shows 3 wires on the dash switch..  12 volt supply, R/LG and B/LG

i need to check that as I suspect only 2 wires connected.

 

Well, I checked the dash switch again and Presto , the Brown and green wire was NOT connected to the switch.. after some looking around under the dash I found it .. connected to the Switch and now the Park switch works.. Thanks to EVERYONE for your help...

Edited by Ol timer, 27 August 2018 - 04:31 PM.