Door micro switch bypass? - Page 2
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Thread: Door micro switch bypass?

  1. #16
    Moderator RRToadHall's Avatar
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    Re: Door micro switch bypass?

    COrrect. The same switch that tells you the door is open tells the lights to turn on.
    "The power of good is always stronger than the power of non-good.
    The power of light is stronger than the power of darkness,
    the power of knowledge is stronger than the power of ignorance."
    ~ Maharishi Mahesh Yogi~

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  3. #17
    LEGACY VENDOR marty_nz's Avatar
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    Re: Door micro switch bypass?

    If you are in the UK, then I rebuild said door latches as a hobby/part of all my other P38 projects. Totally strip them, clean, regrease, and new microswitches in every one. I sell them on exchange for the faulty one back.

    However, I am away working with my real job until the end of October, so not able to ship and out until at least the 20th, which is probably a bit late for you if you are going away on holiday.

    If you need a quick fix, jumpering the CDL chitchat to ground (from memory - I'm on my phone, not laptop so don't have the diagram in front of me) will permanently tell it the door is closed as a temporary measure. I wouldn't run it like that for too long, as the others here mention, it could cause other weird things to happen, but it will get you through in a pinch.

    I also wouldn't trust second hand latches, as you never know how good they are, and even though a lot of places sell them as 'tested' they often don't test the microswitches, and also the fact is, if you're swapping it with another latch of the same age, then how long is it going to be before one of the switches in it will give up! Replacing a 15-20year old switch, with another 15-20year old switch is never a good idea in my mind!
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    '01 4.6 Vogue Black/Lightstone "Snog" -- Bought Jan 2012
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  4. #18
    FRESHMAN ROVER petef's Avatar
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    Re: Door micro switch bypass?

    thanks for that, can you tell me where to get the micro switchs from?,

    pete

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  6. #19
    LEGACY VENDOR marty_nz's Avatar
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    Re: Door micro switch bypass?

    If you have a search on here, there are a few threads with all the part numbers in them, I'm not near my laptop at the moment, so don't have my notes with part numbers to hand.

    I know they have been posted up on a number of occasions though.
    ------------------------------------------------
    '01 4.6 Vogue Black/Lightstone "Snog" -- Bought Jan 2012
    '99 4.6 HSE Cobar Blue/Lightstone -- Sold March 2009
    '95 4.6 HSE Epsom Green/Tan -- Traded June 2008
    http://p38webshop.co.uk

  7. #20
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    Re: Door micro switch bypass?

    The ones I used in mine are Cherry UDC1C-C3AA from CPC Farnell. CPC part number is SW04704.

  8. #21
    FRESHMAN ROVER petef's Avatar
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    Re: Door micro switch bypass?

    thanks for that,have account with cpc!,went out this afternoon thought would have a look,was going to bypass the switch,but the plug looked a bit manky,so cleaned it up and reconected and every thing "seems" to behaving itself!.hope it lasts till after my holiday!,

    pete

  9. #22
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    Re: Door micro switch bypass?

    With the door open the switch should be closed so pins 7 and 11 at the door outstation will be joined together. However, pin 11 has a black wire which would suggest it is an earth so maybe some of the mankyness was shorting them out or you had a short to ground that isn't any more since you've been in there moving things around. More likely that than a microswitch as they tend to fail open circuit not closed circuit (so you get no warning on the dash and the interior lights don't come on). If you haven't put the door panel back on yet, have a good look to see if any wires have been chaffing on anything.

  10. #23
    FRESHMAN ROVER petef's Avatar
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    Re: Door micro switch bypass?

    good point, thanks

    pete

  11. #24
    FRESHMAN ROVER petef's Avatar
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    Re: Door micro switch bypass?

    well that lasted all of one night!,well it looks back to the bypass idea!!
    just when you think you have it lick'd rr comes back and bite's u in the ass!

    pete

  12. #25
    LEGACY VENDOR marty_nz's Avatar
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    Re: Door micro switch bypass?

    If you had problems with the window regulator before, then these are known for grabbing the door latch wiring and causing problems. Especially if the wiring to the latch has been removed before for any reason.

    Could be worth double checking all of the wiring in the door, as a short on the Door Ajar wire will give the problems you are having, as Gilbertd mentioned above.
    ------------------------------------------------
    '01 4.6 Vogue Black/Lightstone "Snog" -- Bought Jan 2012
    '99 4.6 HSE Cobar Blue/Lightstone -- Sold March 2009
    '95 4.6 HSE Epsom Green/Tan -- Traded June 2008
    http://p38webshop.co.uk

  13. #26
    FRESHMAN ROVER petef's Avatar
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    Re: Door micro switch bypass?

    good point, i have looked at rave but not shore if the switch is closed when the door is shut, ie earthed out?, or open circuit?,your reply sugests that if its earthed out when the door is open?

    pete

  14. #27
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    Re: Door micro switch bypass?

    Yes, that's correct, the switch is closed when the door is open. Pins 7 and 11 of the connector to the outstation. 11 is probably an earth and 7 is the one that connects via the switch to the outstation. Check for continuity between the two and for an earth on the wire at pin 7.

  15. #28
    FRESHMAN ROVER petef's Avatar
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    Re: Door micro switch bypass?

    thanks, will give it a go after work tomorrow if its not pissing it down!

    pete

  16. #29
    FRESHMAN ROVER nosync's Avatar
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    Re: Door micro switch bypass?

    I had the same issue: took off the driver door’s panel, found the purple/white wire coming out of the switch, cut and isolated with electric tape. Done!

    Everything still works except for activation of the interior lights, and ( my remote fob been dead) if by accident you depress the driver’s door locking knob as you exit the car, it will not unlock automatically when you shut the door, risking being locked out if the key is still inside the car.


    Sent from my iPhone using Tapatalk

  17. #30
    Moderator RRToadHall's Avatar
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    Re: Door micro switch bypass?

    you need be careful cutting wires. why is your fob dead? you know AB sells rebuild kits with new battery cover and Oring since our remotes are water proof, there is also the new button cover. so again, why is your fob dead? Is one of the battery terminals broken off? that can be rigged

    what ever reason it dead you can order a new fob case off eBay and sacrifice you old case and move your key an its spring along with remote board and the transponder chip over to the new case.
    "The power of good is always stronger than the power of non-good.
    The power of light is stronger than the power of darkness,
    the power of knowledge is stronger than the power of ignorance."
    ~ Maharishi Mahesh Yogi~

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