C43 Horns won't work
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From: Bolingbrook Illinois
1999 C43 Amg
C43 Horns won't work
My horns slowly died out completely. I bought oem horns and tested them before installing. Pressed the horn and nothing at all. I can hear the relay click as I press the horn. So I take the relay is good?
I can't find any fuses that say HORN to check if their blown? Ground should be ok since the horns were working before they died right?
I can't find any fuses that say HORN to check if their blown? Ground should be ok since the horns were working before they died right?
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MBWorld Fanatic!
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From: Bolingbrook Illinois
1999 C43 Amg
Thread Starter
MBWorld Fanatic!
Joined: Feb 2010
Posts: 1,506
Likes: 130
From: Bolingbrook Illinois
1999 C43 Amg
Thread Starter
MBWorld Fanatic!
Joined: Feb 2010
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Likes: 130
From: Bolingbrook Illinois
1999 C43 Amg
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From: MN, USA
C43 5.4, ML320CDI, Fords
if you can hear the relay then it is not your steering sensor aka clock spring.
This is the most basic electric testing. Do you have a digital volt ohm meter? Check power at horn when button is pushed and go from there. Just because the relay clicks, does not mean it is good. Do not assume anything, with simple testing you should have it figured out in 5 minutes.
This is the most basic electric testing. Do you have a digital volt ohm meter? Check power at horn when button is pushed and go from there. Just because the relay clicks, does not mean it is good. Do not assume anything, with simple testing you should have it figured out in 5 minutes.
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From: A.D., U.A.E
2000 (W202 C200) & 2000 (W202 C55)
MBWorld Fanatic!
Joined: Aug 2006
Posts: 7,053
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From: A.D., U.A.E
2000 (W202 C200) & 2000 (W202 C55)
if you can hear the relay then it is not your steering sensor aka clock spring.
This is the most basic electric testing. Do you have a digital volt ohm meter? Check power at horn when button is pushed and go from there. Just because the relay clicks, does not mean it is good. Do not assume anything, with simple testing you should have it figured out in 5 minutes.
This is the most basic electric testing. Do you have a digital volt ohm meter? Check power at horn when button is pushed and go from there. Just because the relay clicks, does not mean it is good. Do not assume anything, with simple testing you should have it figured out in 5 minutes.
ZAYED,,
Senior Member
Joined: Sep 2010
Posts: 446
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From: Culver City, California
1999 C43 AMG
Yes when i got my c43 the horns were not working, i replaced them with new one and same result. checked fuses everything worked. i took a chance by 1st buying the airbag clock spring, but it was not the problem, then i bought the steering angle sensor, which is a separate piece and after installation the horns finally worked.
Thread Starter
MBWorld Fanatic!
Joined: Feb 2010
Posts: 1,506
Likes: 130
From: Bolingbrook Illinois
1999 C43 Amg
if you can hear the relay then it is not your steering sensor aka clock spring.
This is the most basic electric testing. Do you have a digital volt ohm meter? Check power at horn when button is pushed and go from there. Just because the relay clicks, does not mean it is good. Do not assume anything, with simple testing you should have it figured out in 5 minutes.
This is the most basic electric testing. Do you have a digital volt ohm meter? Check power at horn when button is pushed and go from there. Just because the relay clicks, does not mean it is good. Do not assume anything, with simple testing you should have it figured out in 5 minutes.
It's weird because the horns died one at a time. Last one to go was the passenger side. It sounded like it was in its last "breadth" and than stopped.
Anyone have the electric diagram that may show how the horn wires run. That way I can check for current at each point. I'm also going to replace the relay just in case. Thanks benzslo
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From: Bolingbrook Illinois
1999 C43 Amg
Just checked things out.
- There is no power going to the wires to the horn.
- I pulled out the relay and I shaked ita little and I hear something loose?
Dealer wants $35.00 plus tax.
Link below is cheaper and it's the relay that clicks when horn is pressed.
I'm also going to take the relay apart and see maybe I can fix it. But I will buy a new one regardless.
http://www.ecstuning.com/Search/0025420319/ES1615063/
- There is no power going to the wires to the horn.
- I pulled out the relay and I shaked ita little and I hear something loose?
Dealer wants $35.00 plus tax.
Link below is cheaper and it's the relay that clicks when horn is pressed.
I'm also going to take the relay apart and see maybe I can fix it. But I will buy a new one regardless.
http://www.ecstuning.com/Search/0025420319/ES1615063/
Last edited by speed43; Feb 23, 2015 at 01:32 PM.
Thread Starter
MBWorld Fanatic!
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From: Bolingbrook Illinois
1999 C43 Amg
I have the Horn circuit of 1997/8 C280, i think it's the same of C43 one...!
Attachment 304468
Attachment 304467
ZAYED,,
Attachment 304468
Attachment 304467
ZAYED,,
Btw zayed I could not find a fuse that says horn. Are you sure there is a fuse for the horn?
Last edited by speed43; Feb 23, 2015 at 01:36 PM.
Thread Starter
MBWorld Fanatic!
Joined: Feb 2010
Posts: 1,506
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From: Bolingbrook Illinois
1999 C43 Amg
Yeah, when i had problem with Horns, i think i replaced the blue fuse(15A) #41, front of black relay..
Attachment 304479
ZAYED,,
Attachment 304479
ZAYED,,
Thread Starter
MBWorld Fanatic!
Joined: Feb 2010
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From: Bolingbrook Illinois
1999 C43 Amg
Btw, when I pulled off the relay that clicks when pushing horn. The window washer pump stopped working. This relay is the green one in zayeds picture, does this green relay SHARE horn with washer fluid pump? And if yes than this relay should be good right since when off washer fluid pump stops working and when in it starts working?
Is this green relay the one for the horn? I searched for c43 and horn relay and it comes out color black like the one in zayed picture next to the yellow relays.
Is this green relay the one for the horn? I searched for c43 and horn relay and it comes out color black like the one in zayed picture next to the yellow relays.
Senior Member
Joined: Sep 2010
Posts: 446
Likes: 2
From: Culver City, California
1999 C43 AMG
http://www.mbpartsworld.com/showAsse...roduct=7597403
Check this link. has a bunch of relays and descriptions. Helps me alot
Check this link. has a bunch of relays and descriptions. Helps me alot
Thread Starter
MBWorld Fanatic!
Joined: Feb 2010
Posts: 1,506
Likes: 130
From: Bolingbrook Illinois
1999 C43 Amg
http://www.mbpartsworld.com/showAsse...roduct=7597403
Check this link. has a bunch of relays and descriptions. Helps me alot
Check this link. has a bunch of relays and descriptions. Helps me alot
Thread Starter
MBWorld Fanatic!
Joined: Feb 2010
Posts: 1,506
Likes: 130
From: Bolingbrook Illinois
1999 C43 Amg
Well the horns finally work. The problem was the black horn relay.
Although it clicked when the horn was pressed it was still bad (just like Benzslo said).
And with the tips I got from everyone I learned a lot and got some nice links which are saved for reference. Thanks everyone for your help in solving this!
Although it clicked when the horn was pressed it was still bad (just like Benzslo said).
And with the tips I got from everyone I learned a lot and got some nice links which are saved for reference. Thanks everyone for your help in solving this!
Last edited by speed43; Feb 24, 2015 at 06:41 PM.
