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Joined: Jun 08 2020
Posts: 123

Afternoon

In my haste to solve an airbag and srs light and also no horn.

I read it may be the rotary coupler or clock switch. Whichever term you prefer.

I sourced one and fitted it and in my haste to remove the airbag I did not see which way up the red plug attaches in to the back.

On my D2 the plug could only go in one way. However on the P38 it seems the connector is symmetrical and could go in either.

Without guessing. I thought i best ask if anyone knew

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Joined: Dec 30 2015
Posts: 4580

I thought it would only go in one way. Have a close look at it and see if it looks like it has been butchered.

From the picture in RAVE, it looks like it is angled upwards?

enter image description here

Member
Joined: Jun 08 2020
Posts: 123

Super find Rich

Thank you

I thought it may of been but cant see any lugs missing from the female connector in the air bag compared to the male plug lead.

I will look tonight.

Thanks again

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Joined: Jun 08 2020
Posts: 123

Been and re fitted the 2nd hand rotary coupler etc

But no difference still an airbag fault.

Even though the SRS light seems to be flashing rather than just on.

Not sure if it was before. But its definitely flicking now

Also no horns.

Think tomorrow i will try and get 12v to the horns and see if they work powering them direct

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Joined: Dec 30 2015
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On a pre-2000 model and SRS fault will still be there until it is cleared with diagnostics even after the actual fault is cleared. It's only on the later ones where the light goes out after you've fixed the fault without it needing to be cleared.

Horn button applies a ground via the rotary coupler. One side of it will have a ground on it while the other side should go to the relay so the ground causes it to operate.

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Joined: Jun 08 2020
Posts: 123

Oh no so need a nanocom or something like that to clear the fault

Horn wise I best go looking.

Any fuses for the horns to check or just the relay

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Joined: Dec 30 2015
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Fuse 41, 20A, supplies power to the contacts of the relay.

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Joined: Jun 08 2020
Posts: 123

All look OK.

Will have to try and test the horn units properly. Did not have chance at lunchtime

Perhaps easier to unbolt them and test them that way