myke pocock
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| posted on 17/7/10 at 10:48 AM |
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Mini Wiper Motor wireing.
I have a complete Mini wiper system. The motor is marked 14W PARK, 75739J, 12V, 14, 87, 54072108. It has three cables from the motor to the multi
connector that are yellow, red and blue. I am assuming that two go to my wiper switch (Sierra steering column and arms) and one to a constant live
feed for the self park. Am I correct and which lead goes where? Anyone know the answer? Cheers.
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David Jenkins
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| posted on 17/7/10 at 10:55 AM |
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Classic Mini, or modern BMW Mini?
"14W" suggests that it's a Lucas system from an old mini...
[Edited on 17/7/10 by David Jenkins]
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myke pocock
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| posted on 17/7/10 at 11:03 AM |
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Sorry, should have said classic Mini.
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Madinventions
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| posted on 17/7/10 at 11:36 AM |
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There's a bit of a discussion about these here (see page 3 for wiring)
and some more tech info here
Looks like your 3 wires are for speed 1 and speed 2, and there should be a pair of other contacts for the park function?
Ed.
Mojo build diary: http://www.madinventions.co.uk
Solo music project: Syrrenfor http://www.reverbnation.com/syrrenfor
View my band website:
http://www.shadowlight.org.uk
http://www.eastangliankitcars.co.uk/
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David Jenkins
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| posted on 17/7/10 at 12:14 PM |
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The wiring for a Lucas 2-speed wiper motor is... erm... eccentric, to say the least. The simplest solution is to use a Lucas wiper switch, designed
for the job.
I've decades of experience with relays and switches, and I couldn't be bothered to work out how to use the Sierra switch to operate the
wipers. In the end I did it my own way, with a better-looking switch than the Lucas one.
Have a look at this thread for a previous discussion.
[Edited on 17/7/10 by David Jenkins]
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rusty nuts
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| posted on 17/7/10 at 01:07 PM |
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I have Sierra switch's and a Lucas wiper motor using the intermittant relay although I have a Premier wiring loom. IIRC someone on the RHOCAR
website has posted a wiring diagram which may be of help?
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ruudbeckers
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| posted on 17/7/10 at 01:30 PM |
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It should be something like this:
 
Wiring diagram mini wiper
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BenB
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| posted on 17/7/10 at 02:13 PM |
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Wish I'd seen the diagram. I worked it outmyself. The details are on my website. I made my own intermitent wiper out of a 555 astable with some
diodes to get the duty cycle <50%.
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PeteS2k
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| posted on 17/7/10 at 02:14 PM |
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^^^ That's exactly the diagram I used. Works as advertised - two speeds and parking.
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BenB
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| posted on 17/7/10 at 02:17 PM |
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From my website (STM loom). Hope it matches the above! 
Pin Number Loom colour Stalk terminal
1 Black n/a
2 Brown/Green Rs53B
3 Blue/Green Rs53
4 Red/Green RsB1
5 Green n/a
The intermitent wiper function works as follows. A wire is taken off the junction of RsB1 and the Red/Green loom wire- this goes to the N/C terminal
of a relay. The common goes to RsB2. The N/O contact is connected to 12V. Rs53-2 (only on when intermitent is selected) is used to power a 556 (dual
555 astable/monostable). The first 555 is used in variable astable mode (the wiper speed is therefore adjustable). The second 555 is used as a
monostable to provide a pulse to the relay. This switches the motor from park to normal speed. This pulse needs to be long enough to get past the park
position. This is probably in the region of 1/4 second.
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David Jenkins
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| posted on 17/7/10 at 02:33 PM |
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The thing that worries me about that diagram is that the full motor current (about 4 - 8 Amps) goes through the Sierra switch's contacts - and
they were only ever designed to operate relays.
However - if it works - who am I to criticise!
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RK
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| posted on 17/7/10 at 03:23 PM |
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Could relays just be added, and put in line with the Sierra switches? I haven't used anything from a Sierra, I'm just curious. Relays are
free if you look around, or cheap if you can't be bothered.
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myke pocock
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| posted on 17/7/10 at 06:04 PM |
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Ive just found a wireing diagram on the Car Builders Solutions web site catalogue. It may be the same as one of the answers here. Thanks for all the
answers. I think I will go with a seperate switch rather than try and use the Sierra column one.
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Dave Ashurst
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| posted on 17/7/10 at 06:35 PM |
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Wiring between Mini wiper motor and sierra switch is given on Rob Lane's website under "cars data"
http://www.robs7.com/
It's how I did mine - and it still works perfectly 8yrs later
Apologies if it's the same as any of the answers posted above.
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stevebubs
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| posted on 17/7/10 at 10:12 PM |
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Will this work?
 
Will this work?
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David Jenkins
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| posted on 18/7/10 at 08:59 AM |
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This is what I did - the only special requirement is that the the switch has to be a headlight switch - the type that goes OFF - Sidelights -
Sidelights & Headlights. There are dozens of them available in all shapes & forms.
 
wiper wiring diagram
I haven't done the int wipe bit yet - I'll sort that out some other time.
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stevebubs
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| posted on 18/7/10 at 09:08 AM |
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Don't think my diagram has that special requirement...
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David Jenkins
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| posted on 18/7/10 at 09:16 AM |
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Steve,
The problem with your diagram is that you could put both switches on, which would supply power to the high and low speed windings at the same time -
not good!
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stevebubs
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| posted on 18/7/10 at 09:32 AM |
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Good point, well made. However this should not be possible with a stalk-mounted control...or 3 position toggle.
Stephen
[Edited on 18/7/10 by stevebubs]
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David Jenkins
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| posted on 18/7/10 at 10:26 AM |
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In that case - it *may* work OK - but don't hold me to it!
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stevebubs
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| posted on 18/7/10 at 11:04 AM |
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How about this one, then....moves the 12v supply to Speed 1
 
This one prevents both on
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Steve @ sVc
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| posted on 21/7/10 at 11:09 AM |
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You may be interested to know that your wiper motor was made in wee 14 in the year 1987 !
Regards Steve @ sVc
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