W208 CLK320 intermittent Horn
Thread Starter
Junior Member
Joined: Mar 2012
Posts: 33
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1999 CLK Cabriolet 320
W208 CLK320 intermittent Horn
Hi All,
The horn is intermittent and just failed its MOT because of this, took it home and worked fine, and every test I did worked today 10plus, then it diddn't for a few goes couple of hours later before working again, I've cleaned the connectors on the horns etc and tested each horn in turn (it has 2) the other strange thing is all the windows sometimes don't work when first started for a short time, I hadn't put the 2 together but are they somehow linked please? unfortunately I need to wait until it stops then test the horn\windows again,and see if both stop at the same time,
Could it be the sam module playing up, and are they coded to the car,
Cheers
Andy
The horn is intermittent and just failed its MOT because of this, took it home and worked fine, and every test I did worked today 10plus, then it diddn't for a few goes couple of hours later before working again, I've cleaned the connectors on the horns etc and tested each horn in turn (it has 2) the other strange thing is all the windows sometimes don't work when first started for a short time, I hadn't put the 2 together but are they somehow linked please? unfortunately I need to wait until it stops then test the horn\windows again,and see if both stop at the same time,
Could it be the sam module playing up, and are they coded to the car,
Cheers
Andy
MBWorld Fanatic!
Joined: Oct 2012
Posts: 1,427
Likes: 100
From: Florida
2002 CLK 55 AMG cabriolet Eurocharged
Hi Andy,
Indeed could be a sam issue but it sounds more like a corroded or loose connection.
Checking all ground nodes and power nodes would be my first attack.
Are you located near salt water Air like ocean or sea?
Cheers
Indeed could be a sam issue but it sounds more like a corroded or loose connection.
Checking all ground nodes and power nodes would be my first attack.
Are you located near salt water Air like ocean or sea?
Cheers
MBWorld Fanatic!
Joined: Oct 2012
Posts: 1,427
Likes: 100
From: Florida
2002 CLK 55 AMG cabriolet Eurocharged
Hi Andy,
Indeed could be a sam issue but it sounds more like a corroded or loose connection.
Checking all ground nodes and power nodes would be my first attack.
Are you located near salt water Air like ocean or sea?
Cheers
Indeed could be a sam issue but it sounds more like a corroded or loose connection.
Checking all ground nodes and power nodes would be my first attack.
Are you located near salt water Air like ocean or sea?
Cheers
Thread Starter
Junior Member
Joined: Mar 2012
Posts: 33
Likes: 0
1999 CLK Cabriolet 320
Thank you for the reply : )
Yes what you say does make sense if it was a sam issue I'd suspect it won't work at all I think you are on the right path, I live in the UK and they salt the roads in winter,
Tested again this morning worked ran my scanner (amazed it still worked) and on the sam only error was the rain sensor I disconnected years ago,tested again the horn needed 3 to 4 taps before it fired into life, I reseated the fuses and replaced the relay (only £8 from merc) and jiggled the wiring about, I'll keep testing it (I stuffed towels in the horns as to not cheese off my neighbors too much) finger crossed,
When it stopped again the windows worked so at least not related,
Cheers
Andy
Yes what you say does make sense if it was a sam issue I'd suspect it won't work at all I think you are on the right path, I live in the UK and they salt the roads in winter,
Tested again this morning worked ran my scanner (amazed it still worked) and on the sam only error was the rain sensor I disconnected years ago,tested again the horn needed 3 to 4 taps before it fired into life, I reseated the fuses and replaced the relay (only £8 from merc) and jiggled the wiring about, I'll keep testing it (I stuffed towels in the horns as to not cheese off my neighbors too much) finger crossed,
When it stopped again the windows worked so at least not related,
Cheers
Andy
Thread Starter
Junior Member
Joined: Mar 2012
Posts: 33
Likes: 0
1999 CLK Cabriolet 320
I thought Id update - it appears it was the front SAM unit under part of the engine fuse box £30 off ebay - I swapped the sam and the fuse board it was mounted too, and so far its worked every single time, including the windows,
I was concerned it would need coding - but everything seems working fine, the clicking was the sound travelling back through so even though it sounded like the dash it was the SAM module\relays just a bit of foam seperates the cabin from the fusebox,
Thanks to GatorMB for pointing in the right direction,
I was concerned it would need coding - but everything seems working fine, the clicking was the sound travelling back through so even though it sounded like the dash it was the SAM module\relays just a bit of foam seperates the cabin from the fusebox,
Thanks to GatorMB for pointing in the right direction,
