R230 - Alarm signal horn bench test

kevh

Senior Member
Joined
Dec 27, 2015
Messages
60
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Location
Sheffield
Your Mercedes
SL500 (R230) 2003 4966cc
A STAR report has indicated that there is a fault in the communication my alarm siren. (2003 SL500).

The sounder was not working - checked this by locking the car with the remote and then physically opening the drivers door using the emergency key. My hazards flash, but not sounder.

I have fitted a replacement used sounder (which is tested and warrantied by the supplier) and there is no change.

I have taken it back off the car and the used part had the connector and a short length of cable still fitted. Can someone please advise how i might bench test the sounder to check whether it works. (there are 3 cables:- brown, green/yellow and red/yellow).

Thanks very much.

Regards
 

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