My SEC horn dont work - Troubleshooting - Mercedes-Benz Forum
 
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post #1 of 7 (permalink) Old 07-22-2019, 10:01 AM Thread Starter
GT1
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My SEC horn dont work - Troubleshooting

1 ) connected horn direct to battery 12V w/ extra cable they work.
2) Fuse fine.
3) Both cables on my steering wheel connected

Where to search , is there more components for a horn ?

Thanks a lit
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post #2 of 7 (permalink) Old 07-22-2019, 01:51 PM
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Originally Posted by GT1 View Post
1 ) connected horn direct to battery 12V w/ extra cable they work.
2) Fuse fine.
3) Both cables on my steering wheel connected

Where to search , is there more components for a horn ?

Thanks a lit
Hi there,

One of those cables is powered when the ignition is ON, the horn switch then passes this power to your horns.

You might test for power at those C106 connectors, maintain that power to the slip ring, say the top one in the image for example.. then test the the horn button/slip rings function . If its all good, you will get power on the other side...

It seems likely the issue is either here, or the horns ground supply at G101.

Good luck.

M
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post #3 of 7 (permalink) Old 07-23-2019, 11:07 AM Thread Starter
GT1
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Quote:
Originally Posted by MBL87560SEC View Post
Hi there,

One of those cables is powered when the ignition is ON, the horn switch then passes this power to your horns.

You might test for power at those C106 connectors, maintain that power to the slip ring, say the top one in the image for example.. then test the the horn button/slip rings function . If its all good, you will get power on the other side...

It seems likely the issue is either here, or the horns ground supply at G101.

Good luck.

M
Quick check G101, fine.

So most probably slip rings or C106 (Where is C106 located)

Appriciated,
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post #4 of 7 (permalink) Old 07-26-2019, 11:59 AM Thread Starter
GT1
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Sorry stupid question but i never replaced or checked "Slip-rings for horn"

To check "Slip-Rings":

Do i need to remove the steering wheel, or is it located lower towards pedals, or other place? . See attached pics please.

Thank you,
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post #5 of 7 (permalink) Old 07-26-2019, 12:20 PM
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Quote:
Originally Posted by GT1 View Post
Quick check G101, fine.

So most probably slip rings or C106 (Where is C106 located)

Appriciated,
Hi again,

Sorry, I have been away from this..

C106 is up by the steering column. (behind the underdash).

M
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post #6 of 7 (permalink) Old 07-26-2019, 12:22 PM
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Quote:
Originally Posted by GT1 View Post
Sorry stupid question but i never replaced or checked "Slip-rings for horn"

To check "Slip-Rings":

Do i need to remove the steering wheel, or is it located lower towards pedals, or other place? . See attached pics please.

Thank you,
Leave the steering wheel in place..

It's up by the steering column, quits close to where the brake pedal attaches.

M


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post #7 of 7 (permalink) Old 07-26-2019, 02:01 PM Thread Starter
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Highly appriciated. Thank you for good info and pics as well.

Best
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