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[RobG]

Cut the blue capacitor off and solder the two arrowed wires together. Ideally could do with a tweeter connector as well

[05omegav6]

That almost reads like an advert

[Shackeng]

Cut the blue capacitor off and solder the two arrowed wires together. Ideally could do with a tweeter connector as well

I'm off to Entwood's this morning for some assistance on this, given his previous success with his own failed system. Results to be posted later.

[Marks DTM Calib]

A speaker reqiuires an ac waveform to make a sound.

A buzzer requires a DC voltage and has circuitry inside to convert teh DC to AC to drive the internal speaker.

Hence, the park pilot will not sound a buzzer (as its outputing farly low voltage AC)

And a speaker will make a short term click (you should see the cone move to one end) .......before throwing the towel in and burning the voice coil out.

[Shackeng]

A speaker reqiuires an ac waveform to make a sound.

A buzzer requires a DC voltage and has circuitry inside to convert teh DC to AC to drive the internal speaker.

Hence, the park pilot will not sound a buzzer (as its outputing farly low voltage AC)

And a speaker will make a short term click (you should see the cone move to one end) .......before throwing the towel in and burning the voice coil out.

I should have remembered this from my radio training 50 years ago!

Having been to Entwood's today, it seems it was just the reverse switch not operating, as the reverse lights are inop. and the speaker does not work. I was somewhat diverted by the fact that I had 12v to the control box when in reverse, however, Nige tells me that this is a permanent feed, ( I did not think to check if it was there all the time ) and in any case, I should have checked the reverse lights first. 

So all in all I have made a complete and utter Horlicks of it, and have blown what was almost certainly a perfectly good speaker. I hope all who read this thread will learn from my idiotic errors.

[Shackeng]

Do the reverse lights work can you feel a faint vibration from the sensors when ignition at position 2 and reverse engaged (don't forget to plug everything back in first)

No was the result, and thanks for pointing this out Al, so it is almost certainly a switch problem. Pity I've just dropped it off stands after all the AC work, and I've b******d a  -probably- good speaker.

[chrisgixer]

Do the reverse lights work can you feel a faint vibration from the sensors when ignition at position 2 and reverse engaged (don't forget to plug everything back in first)

No was the result, and thanks for pointing this out Al, so it is almost certainly a switch problem. Pity I've just dropped it off stands after all the AC work, and I've b******d a  -probably- good speaker.

Easy enough to replace. (For those that know what they are doing electrically. Ie not me)

[Shackeng]

Join the club Chris. I hope to fit a tweeter in place of it. RobG fitted a replacement behind the passenger's kick panel, which sounds like a good idea to me, as it saves damaging the headlining, and I think I can manage this.

[TheBoy]

The speaker may have survived, who knows...

[Shackeng]

Unfortunately not, we checked it by connecting it to the known good system in Entwood's car with a lead

[albitz]

Which reminds me,I have a tweeter sat on my bench for you. Better PM me your address.

[Shackeng]

Which reminds me,I have a tweeter sat on my bench for you. Better PM me your address.

PM incoming.

[albitz]

Received and replied,with thanks.

[Marks DTM Calib]

Not sure you need to bypass the cap

[Shackeng]

I now have the tweeter from Albs, and have removed the blue thing as per Rob's guide. Is the input 'handed', if so which connection goes to which output from the control box? The output wires from the box are Brown and Red/Brown, and the tweeter wires are Blue and Blue/Brown.