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-   -   Parking/light/seat sounder (https://www.the75andztclub.co.uk/forum/showthread.php?t=319053)

Azur 13th May 2022 13:26

Mine did not work, I took the instrument cluster out, soldered 2 wires at the 2 connector pins from the tiny onboard speaker/chimes, and soldered the wires at 50 cm long to a spare speaker/chime,which I placed under the dashboard. So basically I have 2 speakers actually, one on the instrument cluster, that does not work, and the parralel one which works fine, got the sounds back again.

polinsteve 13th May 2022 14:29

Quote:

Originally Posted by Azur (Post 2931827)
Mine did not work, I took the instrument cluster out, soldered 2 wires at the 2 connector pins from the tiny onboard speaker/chimes, and soldered the wires at 50 cm long to a spare speaker/chime,which I placed under the dashboard. So basically I have 2 speakers actually, one on the instrument cluster, that does not work, and the parralel one which works fine, got the sounds back again.

Strange! I wonder why?

polinsteve 13th May 2022 14:36

Quote:

Originally Posted by SD1too (Post 2931738)
Thanks Steve, I've learnt something today! :D


According to RAVE, the chimer in the instrument pack is triggered by the K-bus so perhaps a bit more complicated!

You're right that intermittent faults are difficult to diagnose.

Simon

As your suggestion, I've been looking deeper into the K-bus. There is a header behind the right hand panel, alongside the column. It seems to be the only place and feature that is common to all 3 failures, so I'll start continuity checks there.

SD1too 13th May 2022 14:52

This tip by MGMarc should make tracing the fault easier Steve.

Simon

SD1too 13th May 2022 14:55

Quote:

Originally Posted by polinsteve (Post 2931839)
Strange! I wonder why?

From Azur's description it sounds as if the original sounder was open circuit. In those circumstances another sounder wired in parallel (which is what I understand Azur did) would operate normally.

Simon

polinsteve 13th May 2022 21:54

Quote:

Originally Posted by SD1too (Post 2931843)
This tip by MGMarc should make tracing the fault easier Steve.

Simon

A great guide. Thanks, I'll give it a go.


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