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Vauxhall insignia

Airbag light is on got no communication with airbag module, checking powers and grounds I have good battery + on pin9 and negative pin 19, I should have a ignition supply on pin17 which I do with it unplugged I have 1 volt below nbv and with it plugged in to the module you get a battery voltage for about a second and then it disappears same when it is load tested which points to resistance in the circuit, so I know pin 17 goes to pin 37 (x210) plug on the n/s pillar but I can’t find what supplies pin 37 in x210 plug, in alldata it says it comes from j329 which I found in the abbreviation list to be headliner harness, looked on Haynes pro and that says it is feed by a relay x72 which I can’t find, and on Bosch it says it is fed by fuse 17 in under bonnet which I done a continuity test to no avail, so my question is does anybody have any information to the other end of the wire which goes to pin 37 or what feeds it.

Thanks

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