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Fusebox Immobiliser ?

Discussion in 'A3/S3 Forum (8L Chassis)' started by A3 T, Nov 3, 2011.

  1. A3 T
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    A3 T Lord Of The Rings

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    If i was to fit an immobiliser, what would be the best fuse to tap into behind the fusebox ?

    I don't want to tap into the starter as i want it to be able to make the engine cut out if its running.
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  2. Dani_B19
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    Dani_B19 Audi-sports own special child.

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    Your car will already have one fitted mate.
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  3. A3 T
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    A3 T Lord Of The Rings

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    Yes mate but its a bit pants :p
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  4. Dani_B19
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    Dani_B19 Audi-sports own special child.

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    I know mate, s3's standard alarms are meant to be thatcham approved but their utter ****e haha.
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  5. Kave
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    Kave Member

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    The obvious one would be fuel pump mate
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  6. A3 T
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    A3 T Lord Of The Rings

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    Hmmm....



    Would that be fuse number 28 or 29 ?



    If the car was being revved up and you pulled the fuel pump fuse, can it f*ck anything up?
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  7. A3 T
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    A3 T Lord Of The Rings

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    ^^^
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  8. A3 T
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    A3 T Lord Of The Rings

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    I’ve just been thinking (i know i shouldn't do that....lol) ....

    If the locks work on a pump, does that mean i wont be able to use the doors as one of the triggers?
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  9. A3 T
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    A3 T Lord Of The Rings

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    Come on guys one of you must know :think:
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  10. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    There are typically three fuses for the EFI system. each car/model/year varies a bit, but typically one covers the coils, one covers the injectors and fuel pump, and one covers everything else.

    Use the wiring diagram and find out what they do and pick the best one to cut. Personally i'd do the coils, as it cuts power immediately.
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  11. A3 T
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    A3 T Lord Of The Rings

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    I think I've found the answer to one of my questions.


    What confused me was that i was looking at a fuse diagram that listed both 28 and 29 as being for the fuel pump.

    But i looked at the diagram on the car and it shows that the fuel pump is fuse 28:


    [​IMG]



    I still need to know if the car was running at high revs and the immobiliser kicked in and cut the fuel pump fuse.....

    Would it damage the engine in any way ?
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  12. A3 T
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    A3 T Lord Of The Rings

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    aragorn has said that if he has time he will look up the wiring diagram and let me know what fuse i would need to cut for the coil packs.....


    But i thought there's no harm in asking the rest of you just in case he don't find time.....lol


    So does anyone know what fuse controls the coil packs?
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  13. s3dave
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    s3dave TFSI Hybrid

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    Fuse 29 should kill the coils IIRC.
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  14. A3 T
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    A3 T Lord Of The Rings

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    Thanks mate ;)


    That's what aragorn said it was .
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