Replacement Windscreen Wiper Motor Wiring

[tmulchro]

Hi All,

After having making several stupid wiring mistakes and having blown several fuses - I thought I'd provide the forum with some guidance on fitting an exchange Lucas 6W Wiper Motor (From Wadhams) to a Rover P5B Coupe (1971)

Firstly though, I'd like to thank John (JohnW5PBCoupe) for his help and guidance

When you get you exchange motor - DON'T DO THIS - Look at the wiring coming from the wiper motor and connect the most similar colour wires to those on the loom - You'll blow a fuse or worse.... I blew many fuses experimenting with the wiring

The exchange wiper motor unit from Wadhams had the following 5 wires (note - no wiring assignment information came with the unit - I mailed Wadhams and received the following info)

Green – ignition
Red – park
Brown – slow speed
White – coil
Blue – ignition


This doesn't really help and you need to open the motor casing by removing the two screws on the motor top plate and to check the wiring assignments inside the unit

Here's what I found on my unit :
Brown - to coil
Green - to coil
Blue and white together on one motor armature/brush
Red to the other motor brush, with an additional red wire which goes to the park switch

You'll also notice a threaded hole on the motor top plate - with "E" for Earth (I completely over looked this at first)

To get my motor working properly, I connected the Wadhams replacement wiper motor up as follows :


Wiring Connections
Motor ------------------------------Loom
Green-------------------------------White/Green
Red---------------------------------Red/Green
Blue-------------------------------- Blue/Green
White-------------------------------Blue/Green
Brown------------------------------ Brown/Green

Last but not least ..... The black wiring loom Earth connection

I made up an earth lead, connected it to the body of the motor (there's a threaded hole on the motor cover plate marked "E" - Connected the earth lead to the black wires on the loom

For me, using these loom to motor connections everything works !

If this doesn't work, you might want to check the wiring on the wiper switches on the dash (in case they have been removed and incorrectly re-connected) or check for wiring continuity

Thanks again to John and to all those who have posted to this forum - lots of invaluable information
Tony M

Photos below :

Wiring Loom at wiper motor 


Motor Cover Plate with Threaded Earth Terminal



Internal Motor Wiring 


Top Plate off - Wiper gears and park switch


My Rover P5B Coupe


My Rover P5B Coupe

[johnwp5bcoupe]

Hello and "Welcome to the Forum" Tony

Nice looking Coupe BTW

[johnwp5bcoupe]

This is what the motor wires should look like

[johnwp5bcoupe]

They are not always that easy to sort Richard

After 50+ years you can get burnt out Armatures, burnt out field windings, Armature Copper Segments worn beyond repair,Brushes worn out, Bearings seized, Shafts seized and before you start anything every part has to come out to remove the old grease which can be like Araldite! usually the wires are so dirty you cant tell one colour from the other so as in Tony's case they were changed (the correct colours would have been nice plus better soldering) not to mention an good clean then a "polish" of the cover!they can get rather pitted so it is difficult to remove the deep ones I like to see the Aluminium

It can take at "least" a couple of hours to do one! if it's a bad one a lot more so at £40+ an hour

David Green does a "replacement" service for those who get stuck

[rover89]

Hi All,
Recently i bought from JRW a reconditioned wiper motor (not only because my recent order had a 332 pound total cost ) for my MKIII model 1966 Rover P5 coupe. I had to send my wiper motor from Greece by post and finally i receive the reconditioned unit . My first problem was that there was NO WIRING DIAGRAM with it . When my experienced auto - electrician disconnect the old motor he mark the cables to fit its again But th reconditioned motor had NEW wires . I ask JRW and a ... few days later the send me the usual email :
Dear Sir Further to your enquiry, the wiper motor is wired the following way (this is for guidance only)
Green – ignition , Red – park , Brown – slow speed , White – coil , Blue – ignition
As stated, this wiper motor should only be fitted by a qualified auto electrician who will be able to match the wiring on the wiper motor to the functions in the car.
Regards,
Marsha

BUT there was NO SOLUTION ,
wiper motor refuse to work !!

SO

next we tried (not me, my electrician of course) to follow tmulchro instructions :
To get my motor working properly, I connected the Wadhams replacement wiper motor up as follows :
Wiring Connections
Motor ------------------------------Loom
Green-------------------------------White/Green
Red---------------------------------Red/Green
Blue-------------------------------- Blue/Green
White-------------------------------Blue/Green
Brown------------------------------ Brown/Green
Last but not least ..... The black wiring loom Earth connection . I made up an earth lead, connected it to the body of the motor (there's a threaded hole on the motor cover plate marked "E" - Connected the earth lead to the black wires on the loom
Read more: roverp5.proboards.com/search/results#ixzz4ARLl16hM

BUT NOTHING AGAIN !!!

So i send several emails to JRW BUT THERE WAS NO REPLY AT ALL !!!!

19/5/2016 to JRW

Dear sir i am JRW customer since 2010 .recently i bought some parts for my rover P5 . One of he is a wiper motor . I had to send my old one to exchange it plus money with a reconstructed unit,
BUT here comes the problem.
The reconstructed unit can with no wiring diagram and my qualified auto electrician could not find the correct connection process.
Disconnecting my old unit he had marked with blanc lines the cables but the new unit came with new wires and without a wiring diagram
I ask for help from your enterprise but i only got the following note :
Dear Sir . Further to your enquiry, the wiper motor is wired the following way (this is for guidance only)
Green – ignition , Red – park , Brown – slow speed , White – coil , Blue – ignition
As stated, this wiper motor should only be fitted by a qualified auto electrician who will be able to match the wiring on the wiper motor to the functions in the car.
Regards, Marsha
Also i found here roverp5.proboards.com/thread/9477/replacement-windscreen-wiper-motor-wiring
this guidance
To get my motor working properly, I connected the Wadhams replacement wiper motor up as follows :
Wiring Connections
Motor ------------------------------Loom
Green-------------------------------White/Green
Red---------------------------------Red/Green
Blue-------------------------------- Blue/Green
White-------------------------------Blue/Green
Brown------------------------------ Brown/Green
Last but not least ..... The black wiring loom Earth connection
Read more: roverp5.proboards.com/thread/9477/replacement-windscreen-wiper-motor-wiring#ixzz4933lGcmQ

BUT THIS WIPER MOTOR REFUSE TO WORK!!
WAITING FOR YOUR ADVICE
REGARDS
JOHN


I HAD NO ANSWER SO I POST IT AGAIN TWICE , AGAIN NO ANSWER AT ALL


FINALLY I SEND ON 23.5.2016 THIS EMAIL TO JRW :
Since there is no response to my mail , i demand an answer from your chief in charge
you must send a wiring diagram for this reconstructed wiper motor which is probably not working

AGAIN NOOOOO ANSWER AT ALL FROM JRW

HERE ARE PHOTOS FROM THE RECONDITIONED MOTOR , AN MY ORDER PROFORMA

your advices please !!!

[Warwick]

Thanks for a very useful thread, Tony. Excellent photos too.
And thanks for your photo, John. Can we make this a Sticky please?

[johnwp5bcoupe]

Good Luck John if you have opened the motor

The soldering as I said previously is terrible to the point of being a dry joint

Now a Sticky Warwick