Question about Mercedes-Benz Vehicle Parts & Accessories

1 Answer

Hello, My Mercedes MB100 van is missing it's user manual and I need to find out which fuse to replace in order to attempt to fix a silent horn.

Relay looks ok, as does the horn connectors itself. Must just be the fuse.

Posted by Anonymous on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Mercedes-Benz Master
  • 4,290 Answers

One of these models may be the vehicle

Posted on Apr 20, 2015


1 Suggested Answer

  • 2 Answers


Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Where is a horn relay on a 2007 Honda civic located? what does it look like?

Click on the link. Horn wiring, non-hybrid. The relay is part of micu, multiplex integrated control unit.
I don't believe the relay is removable. You can check the fuse. Not only check the fuse, use test lite to check voltage on fuse circuit. There are several things you can do to see if horn will sound. I couldn't get everything in the one picture. The horn shows a one wire connector, you can take connector loose, use jumper wire connected to B+ to see if horn will sound? You might use an inline fuse, just in case. Your horn switch is just a ground for control side of relay.
I can't diagnose the micu, itself?

Oct 08, 2017 | Honda Cars & Trucks

1 Answer

Horn is inoperable

when you push on the horn pad you should hear a click, if you do then the system is working from the horn pad to the relay as the relay is what is clicking. then you just have to check at the horn connector to see if you have power, if you do then the horn is no good. if you don`t then check the wire from the horn back to the relay for a problem.

Aug 30, 2014 | Cars & Trucks

3 Answers

My 2001chrysler town and country van horn does not work

Check the horn relay to see if it works. Most cars use the same relays for multiple other functions. Check the part number on the horn relay and find another relay that is working that has the same part number. Swap out the horn relay with the known good relay. If that doesn't work, check all the wiring in association with the horn. If all the wiring is sound, then it is probably the horn itself, but that is very rarely the case.

Aug 02, 2012 | 2001 Chrysler Town & Country

2 Answers

Horn does not work 97 crown victoria


Aug 06, 2011 | 1997 Ford Crown Victoria

3 Answers

I check the fuse and the horn is not working

Check in your owner's manual for the location of the horn relay. It will usually look like a small metal or plastic box that plugs into either the main fuse box or the high amp fuse box under the hood. If your horn fuse is good then most likely the horn relay needs replaced.

May 15, 2011 | Ford Five Hundred Cars & Trucks

1 Answer

My 89 wrangler horn is not working. what should I do first

Assuming the fuse is ok,(thinking it's dome light also)
Unplug the horn itself and check for 12 volts when the horn is applied.This will check the horn .
If there is no power there,you will have to check either at the steering column connector,(for ground when the horn is applied)
Or at the relay for ground on the control side and 12 volts on the
output side.
You should be able to hear the relay click when the truck is off(ign,on) That's a much easier way to check the relay!
I would more suspect the horn itself ,due to winter salt and such.

Apr 07, 2011 | Jeep Wrangler Cars & Trucks

1 Answer

My horn does not work, how do i reapir it

if you push on the horn you may or should hear a click,this is the horn relay and this tells you that the fuse is good the horn pad is good and the relay is good.if you can`t hear the relay then check the fuse for the horn.if good then at the horn itself use a jumper wire from the battery positive to the connector on the horn itself(pull off the wire connector and check for corrosion of the connector and the tab it fastens to on the horn) the horn should blow.if not then you need a horn.

Mar 18, 2011 | 2003 Lincoln Town Car

2 Answers

My horn doesnt work

Once you checked the Fuse as OK ( engine compartment fuse panel, fuse #7 ) , might want to try shorting the Normally Open contacts in the Horn relay, to see if it is the horn, or the switch from the steering wheel.

Pull the Horn relay ( Ford 1/2 ISO relay ) Relay 205 in the same fuse panel in the engine compartment ). Looking into the relay socket, you will see 2 sets of pin terminals that are the width of the narrow direction, and 2 that are point the length.
The 2 pin terminals that are the direction of the narrow width of the socket, jumper with a 16/18 AWG, and the horns should sound.

If the horns do not sound, check the pin terminal #3 for +12 V DC ( hot all the time ) with a known good ground ( lug in the fender or the neg side of the battery.
If this checks OK, with the jumper in place, pull the horn connector,and check for +12 V DC on one of the pins, to a known good ground ( fender lug where the headlamps are grounded ).
Horns are behind the bumper on the passenger side, directly below the headlamp.
Next test the same, using both pins in the horn connector.
If you have +12 and ground at the horn connector, the horns are the problem for some reason.

If the horns honk doing the jumper test, work back towards the horn button / clock spring area.
Pin terminal #1 in the socket should be hot all the time, and the pin # 2 is what ground is switched to from the horn button, to activate the coil in the relay.

If you do not have ground at Pin #2 when pressing on the horn, try tilting the steering wheel all the way to the up position and try again ( some times the connector at the base of the steering wheel column pulls apart ).
If the tilt does not change getting ground to the horn relay, the next step would be to test the clock spring, but this requires removing the airbag, and really should be a professional job.

Nov 07, 2009 | 2001 Ford F150 Styleside SuperCrew

2 Answers

2000 Tahoe Horn broken

You can remove the horn relay and use a Ohm meter and check the resistance between the horn relay connector terminal No. 86 (Black Wire) and ground. If the ohms are less then 5 ohms replace the horn relay. There are a lot more tests but as Polarcycle states you can do what he suggested other then I believe you have two horns in this vehicle.

Jul 28, 2009 | 2000 Chevrolet Tahoe

Not finding what you are looking for?
Vehicle Parts & Accessories Logo

Related Topics:

166 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercedes-Benz Vehicle Parts & Accessories Experts


Level 3 Expert

84625 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

xxxxxx xxx

Level 3 Expert

5013 Answers

Are you a Mercedes-Benz Vehicle Part and Accessory Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides