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potato head

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Posts posted by potato head

  1. Rang up the good people ay Ashcrofts today to order a cross drilled input gear for a 1.2 transfer box rebuild only to be told there out of stock and won't have any in until Feb / March - shock horror!!!!!

    Now I've heard stories of people using 'other' suppliers and encountering noise issues, this was also mentioned by Ashcrofts.

    So where should I go to get a good one that's not the price of a gold bar and not supplied in a blue box?

  2. 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

    2012-12-31%2008.49.55.jpg

    2012-12-31%2008.50.06.jpg

    For fitting purposes I removed the potentiometer from the PCB

    2012-12-31%2014.43.27.jpg

    2012-12-31%2014.43.12.jpg

    2013-01-01%2008.08.48.jpg

    Soldered the terminals with approx. 12'' of 11amp cable

    2013-01-01%2009.36.49.jpg

    Tidied it up a bit

    2013-01-01%2009.40.41.jpg

    Put some polystyrene in the box and fitted the PCB with a little mod to the board and box / lid for the cables

    2013-01-01%2009.49.20.jpg

    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.

    2013-01-01%2011.43.24.jpg

    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.

    2013-01-02%2013.40.03.jpg

    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

    Wiring%20Diagram.png

    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 modification

    Hope 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.

  3. What about refusal when delivered? My understanding, but I could be wrong, was that if you had an issue like this you advised the company you wish to cancel the order, even if its in transit, and just refuse delivery if it arrives. That way the courier company will just return it at no cost to yourself.

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