Dusty
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| posted on 25/2/12 at 07:57 PM |
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Air bag tape.
I bought a 10 year old polo with amongst other things an airbag light on and non parking wipers. Today I had the steering wheel off to fit the new
wiper switch and have been doing a few electrical checks. There is a flat tape type wire from column to air bag with several coils of it in a drum in
the wheel hub. It looks like two wires but my meter shows all four pins, two at each end, are common. Surely wrong? Something shorted. This is my
first car with an airbag. Anyone know how these things work?
Air bag not yet gone bang!!!! but it is bit scary.
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minitici
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| posted on 25/2/12 at 08:06 PM |
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I wouldn't go poking about an airbag wiring with a mulitmeter
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bi22le
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| posted on 25/2/12 at 08:14 PM |
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Search for my recent post about changing the air bag closk spring for a little reference.
I hope your battery is disconnected!!
Dont question the wiring too much, If the air bag light comes on then off, dont question it!!
Maybe the two pins are to gaurentee continuity, an air bag needs to only work once, if it dont then someone gets sued!!
Track days ARE the best thing since sliced bread, until I get a supercharger that is!
Please read my ring story:
http://www.locostbuilders.co.uk/forum/13/viewthread.php?tid=139152&page=1
Me doing a sub 56sec lap around Brands Indy. I need a geo set up! http://www.youtube.com/watch?v=EHksfvIGB3I
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Mark Allanson
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| posted on 25/2/12 at 08:15 PM |
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quote:
Originally posted by minitici
I wouldn't go poking about an airbag wiring with a mulitmeter
Beat me to it, you are applying a sample voltage to the trigger wire!
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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Dusty
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| posted on 25/2/12 at 08:20 PM |
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The air bag is on the back seat of the car. The wiring is in the kitchen!!!!! Battery was disconnected for an hour before I started on removing the
airbag. I'm not quite as green as I am cabbage looking.
I really would like to know are the two wires in the tape supposed to be electrically isolated from each other. Can the bag be triggered with a single
wire? Is the tape just a power supply with the airbag works in the steering wheel? Is the trigger mechanism in an ECU somewhere else in the car and
there should be two wires to trigger?
[Edited on 25/2/12 by Dusty]
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indykid
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| posted on 26/2/12 at 12:32 AM |
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If i was designing an airbag system, I'd want a standalone system, so a dedicated feed and earth. I'd also probably build redundancy into
delicate components, so it seems reasonable that there'd be two ribbons commoned in the relatively delicate clock spring.
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bi22le
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| posted on 26/2/12 at 12:51 AM |
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I have been wetting a babies head tonight so really not.fit to comment. Ill reply tomorrow with sensible answers to your questions, not in a pub, not
while drunk.
Track days ARE the best thing since sliced bread, until I get a supercharger that is!
Please read my ring story:
http://www.locostbuilders.co.uk/forum/13/viewthread.php?tid=139152&page=1
Me doing a sub 56sec lap around Brands Indy. I need a geo set up! http://www.youtube.com/watch?v=EHksfvIGB3I
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