potato head Posted January 2, 2013 Share Posted January 2, 2013 My 90 has the old 'single wipe down and two position two speed up' stalks and rather than go down the route of new stalk, wiring loom and programmable timer relay, I decided to look into a different solution. The aim of the modification was to have the same stalk controls but also to have a variable intermittent wipe and this is how I did it, You will need.... The Timer PCB A relay and Base A box for the PCB (I used a MB1) A knob for the potentiometer (variable resistor) on order Wire, heat shrink and soldering iron This is the PCB, as it came, out of the packaging with the variable resistor on For fitting purposes I removed the potentiometer from the PCB Soldered the terminals with approx. 12'' of 11amp cable Tidied it up a bit Put some polystyrene in the box and fitted the PCB with a little mod to the board and box / lid for the cables Prior to final fitting I wired up the PCB Green - 12v (ignition live via a 3 amp fuse) and linked to common Black - earth Pink Signal wire to NO terminal All 3 cables were 11amp There was about 12'' of green and black and 24'' of the pink wire. Then fitted the lid (no photo but I think you can all imagine a lid fitted?) The PCB box was then fitted behind the centre console and the controller mounted in the front. The pink wire was fed to the dash area. I then needed to wire up the relay which was a DPDT 12v type. The operational control of the relay (power to the coil) was from the pink wire on the PCB board. The other side of the coil was to earth The terminals on the relay are supplied by cables on the wiper switch. (I modified the switch side of the cables rather than the harness side for two reasons - they are easier to get to and easier to put back to normal if this mod didn't work!) Obviously if my switch fails in the future then I will need to modify the new switch cables but that's something I will need to deal with at that time. I connected a new green cable approx 12'' long to the green cable on the switch (cut, re-soldered and heat shrink) and did the same to the Red / Light Green cable. I then cut the Brown / Light Green cable and extended both cut ends with the same colour cable (again each 12'' long) Now on one of the throws of the relay (one set of contacts) I connected the Brown / Light Green wires to the common and normally closed terminal. On the other throw I connected the Green to the common and the Red / Light Green to the normally open terminal I know the drawings poor but I hope it's clear enough to follow. The relay was mounted behind the speedo and everything put back together With the ignition now on I can operate the wipers as normal or I can just turn the knob (when it arrives) on the variable resistor and I get an intermittent wipe at what ever delay I want from 3 to 30 seconds. If I want to override the intermittent I just operate the wiper stalk as normal. you will find a video which shows the operation of the modificationHope this is of help to someone in the future but if you do attempt this mod I take no responsibility if things go wrong. I'm an engineer not an electrician and cannot be held responsible for any issues that you have. If anyone notices any issues with my take on electrics, please feel free to comment. Quote Link to comment Share on other sites More sharing options...
Mo Murphy Posted January 3, 2013 Share Posted January 3, 2013 Good job ! I'm sure someone will find it useful Mo Quote Link to comment Share on other sites More sharing options...
western Posted January 3, 2013 Share Posted January 3, 2013 link posted in our tech archive Quote Link to comment Share on other sites More sharing options...
Nige888 Posted September 20, 2013 Share Posted September 20, 2013 Excellent post, a great solution. However, there is an accessible solution for all us ham handed with a soldering iron. There is a relay that does this when plugged into a standard wiper socket. Click intermittent on/off once, then wait a while and turn on intermittent. This measures and copies the interval (I think 1-30 seconds) The one I have is DUDOCO - Interval Chip - 3579 0010 01 Here is a similar product - http://www.autopartswarehouse.com/intermittent_wiper_relay~pop.html Mine was bought a long time ago for an Audi and works fine in my defender. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted September 20, 2013 Share Posted September 20, 2013 11amp cable is a bit overkill for a potentiometer, you could get away with something piddly like Cat5 network cable as it shouldn't be carrying any current. Quote Link to comment Share on other sites More sharing options...
Michele Posted September 20, 2013 Share Posted September 20, 2013 However, there is an accessible solution for all us ham handed with a soldering iron.There is a relay that does this when plugged into a standard wiper socket. Mine was bought a long time ago for an Audi and works fine in my defender. I got mine from my father's poor VW Passat, before bringing her to the scrapper with just 470000 Km on the clock It was a five mins job. Quote Link to comment Share on other sites More sharing options...
weasel_110 Posted September 21, 2013 Share Posted September 21, 2013 Will this work on the same principle in my '89 110?http://www.ebay.co.uk/itm/AMR2341-Land-Rover-Defender-90-110-130-Wiper-Intermittent-Delay-Relay-93-10-/290914314254?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item43bbd8280e Quote Link to comment Share on other sites More sharing options...
weasel_110 Posted September 21, 2013 Share Posted September 21, 2013 Oh! This will work on all Defenders chassis number HA onwards on post 2002 Td5's the relay this replaces is located behind the speedo. **Will not work on early models upto chassis number GA** Quote Link to comment Share on other sites More sharing options...
western Posted September 21, 2013 Share Posted September 21, 2013 won't work on earlier vehicles because the wiash/wipe stalk is not the right type, but that can be replaced & with the unit you linked to can be made to work, done it on my 110 years ago, here's how http://forums.lr4x4.com/index.php?showtopic=927 the LR sub loom is no longer available but Autosparks can supply an alternative loom, for the same job.http://www.autosparks.co.uk/product_info.php?products_id=5128 no photo. Quote Link to comment Share on other sites More sharing options...
weasel_110 Posted September 21, 2013 Share Posted September 21, 2013 Cheers for that Western and yes, I should check the Tech archive before I post lol!Had this on mine until it packed up 3 yrs ago...worked great up till then!From 'Tandy', remember them?...... Quote Link to comment Share on other sites More sharing options...
Anderzander Posted September 21, 2013 Share Posted September 21, 2013 Would those plug in ones work on the rear wash wipe ? Quote Link to comment Share on other sites More sharing options...
western Posted September 21, 2013 Share Posted September 21, 2013 I have one of simonb's rear wiper intermittent kits on my rear wiper, the relay needs modding to alter the timing between wipes as 3 secs on a rear screen is far to often, IIRC mine wipes every 40 seconds.but still wipes 4 times when washer is operated.see my post in link below others have used this http://forums.lr4x4.com/index.php?showtopic=192 Quote Link to comment Share on other sites More sharing options...
Jonathan Posted November 18, 2014 Share Posted November 18, 2014 The Picture and Wiring diagram links don't work Would it be pssible to update Quote Link to comment Share on other sites More sharing options...
western Posted November 18, 2014 Share Posted November 18, 2014 pictures may have been moved or deleted from the hosting website, not much we can do about that, Quote Link to comment Share on other sites More sharing options...
Steve King Posted November 19, 2014 Share Posted November 19, 2014 Hella used to market an intermittent wiper kit - it was easy to wire and worked well. I think it has been discontinued though! Quote Link to comment Share on other sites More sharing options...
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