q-peng shift light

Discussion in 'Electrical' started by Farmerchris, Aug 14, 2018.

  1. Farmerchris

    Farmerchris Paid Member Paid Member

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    Mar 21, 2017
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    Hi all.
    I stripped down my mk2 1.8t for a bit of a refresh including removing the q-peng ECU &loom. I thought I did a good job labeling everything but I missed one. It's a single green& white wire which came from the cabin. I'm 99% sure it's for the shift rev limiter light. However I can't seem to make the bugger work.

    IV tested the led and it's ok. IV swapped the positive and negative incase I have them wrong but no luck and triple checked the connections/earth

    I assume 12v is triggered from the ECU when the correct rpm is reached but I may be wrong.

    If anyone has a wiring diagram handy or can explain how the circuit works I'd be grateful.

    Cheers
     
  2. KeithMac Forum Junkie

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    Location:
    Kazakhstan
    "Normally" an ecu will ground an output via an internal transistor but best to double check!.
     
  3. Farmerchris

    Farmerchris Paid Member Paid Member

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    Thanks Keith Ill check with the multi meter if it is set up how you suggest.
     

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