Horn not working

Martin Butler · 22nd May 2024, 15:04

I, need some expert advice here guys, , My horn just stopped working, I have checked the horn by using fly lead s direct to the battery, and the horn is ok I checked fuse 31, it wasn't, blown, but because the tangs were darkened,, I changed it anyway ,So where do I start with the fault finding, at the steering wheel controls, or the relay? If its the relay, I understand that they are , soldered to the PCB can they be unsoldered and changed easily ?

SD1too · 22nd May 2024, 15:55

Quote:

Originally Posted by Martin Butler

So where do I start with the fault finding ...

With your voltmeter on the purple/blue terminal of the horn Martin, looking for +12v.
If there's nothing there, beside the windscreen washer bottle is a grey 6 pin connector which links the main harness to the horn wiring. Separate it and check for voltage on pin 3 on the female side.

Simon

Teflon · 22nd May 2024, 17:27

I'm a great believer in trying the simple things first. Mine stopped working last year and so, having first checked the fuse, I wondered if it could be a simple case of dirty contacts on the horn buttons. I set about repeatedly pressing each horn button and after around 2 dozen presses on each one, they slowly came back to life - intermittently at first, then fully operative. They've been working fine ever since.

Worth a go as it costs nothing, and takes only five minutes to try. You never know, you might get lucky like I did

Cliff

planenut · 22nd May 2024, 18:00

One of my twin pair stopped working and eventually found a failed wire between the multiplug behind the headlight and the horn terminal. Fresh wire sorted it.

Arctic · 23rd May 2024, 01:00

Hi Martin
Have you had the bumper off for any reason then it stopped working if so the plug next to and just above the water bottle may not be fully pushed home, or it could have come loose worth checking.

Martin Butler · 24th May 2024, 10:31

Quote:

Originally Posted by Arctic

Hi Martin
Have you had the bumper off for any reason then it stopped working if so the plug next to and just above the water bottle may not be fully pushed home, or it could have come loose worth checking.

do you mean the grey multi plug on the underside of the washer bottle, it's not been disturbed it's hard to get at anyway, without removing the front end, what is the direction of the horn circuit, is it fuse, relay horn push then horns, with earth completing the circuit I checked the fuse, and there's power, there, but at the horn connector, it's dead, I at some point am going to have the front end off to change the bonnet cables, am i right in thinking the wiring for the horn, runs across scuttle panel because i have now got a spare horn, so i have a high and low, , and I've got a spare horn connector, so I might as well fit both and splice a new pair of wires in to the harness connecting to the spare horn connector, and have both horns fitted.

SD1too · 24th May 2024, 11:10

Quote:

Originally Posted by Martin Butler

do you mean the grey multi plug on the underside of the washer bottle ...

No Martin, Steve means the connector which I've described in post no. 2, "next to and just above the water bottle".

I hope this helps.

Simon

Martin Butler · 24th May 2024, 17:29

Quote:

Originally Posted by SD1too

No Martin, Steve means the connector which I've described in post no. 2, "next to and just above the water bottle".

I hope this helps.

Simon

OK I will take another look the only plug on my car by the water bottle is a grey one, but its forward of the water bottle and not easily reached without taking the bumper off, my cars a 2.00 CDL with the water bottle on the driver's side.
can anyone post a picture, so I'm not looking for the wrong plug

SD1too · 24th May 2024, 17:37

Quote:

Originally Posted by Martin Butler

... the only plug on my car by the water bottle is a grey one ... can anyone post a picture, so I'm not looking for the wrong plug

I'm afraid that I don't have a photo that I can post but it's grey, has six pins and the wiring colours are slate/green, brown/yellow, purple/blue, black, yellow/brown.

That should be enough for you to identify it.

Simon

Martin Butler · 26th May 2024, 13:53

I have just been looking at the wiring diagram and can someone clear up something i'm not 100 per cent sure of, mine has the later fuse box, with the mini fuses, Is it only the earlier cars that have the horn relay fixed to the pcb, because the earlier wiring diagram, says horn relay on rear of panel, showing 3relays, where as the later, shows it on the front, and 4 relays , i checked mine and there's 4 relays, I have started the process of checking, and there's no reading, at the horn plug, and no reading at the multi plug, I bridged the connection at the plug end with 12v direct and the horn sounded, so the fault is beyond the multi plug either the steering wheel wires, or relay

22nd May 2024, 15:04	#1
Martin Butler Loves to post MGF1.8 Join Date: Sep 2021 Location: St Leonards Posts: 385 Thanks: 46 Thanked 72 Times in 49 Posts	Horn not working I, need some expert advice here guys, , My horn just stopped working, I have checked the horn by using fly lead s direct to the battery, and the horn is ok I checked fuse 31, it wasn't, blown, but because the tangs were darkened,, I changed it anyway ,So where do I start with the fault finding, at the steering wheel controls, or the relay? If its the relay, I understand that they are , soldered to the PCB can they be unsoldered and changed easily ?

22nd May 2024, 17:27	#3
Teflon This is my second home Lagoon 2.0 V6 75 Conn SE Saloon Join Date: Nov 2006 Location: Chertsey Posts: 5,221 Thanks: 2,825 Thanked 2,920 Times in 1,570 Posts	I'm a great believer in trying the simple things first. Mine stopped working last year and so, having first checked the fuse, I wondered if it could be a simple case of dirty contacts on the horn buttons. I set about repeatedly pressing each horn button and after around 2 dozen presses on each one, they slowly came back to life - intermittently at first, then fully operative. They've been working fine ever since. Worth a go as it costs nothing, and takes only five minutes to try. You never know, you might get lucky like I did Cliff __________________ No. 4 of 6

23rd May 2024, 01:00	#5
Arctic Give to Learn Freelander 2 Join Date: Aug 2010 Location: West Midlands Posts: 18,819 Thanks: 1,155 Thanked 6,407 Times in 3,874 Posts	Hi Martin Have you had the bumper off for any reason then it stopped working if so the plug next to and just above the water bottle may not be fully pushed home, or it could have come loose worth checking. __________________ Arctic Givology Learn to Give Everything is Achievable ad altiora tendo. Check out our Nano meet dates http://www.midlandsnanomeets.co.uk/ http://www.the75andztclub.co.uk/index.php?thepage=howto " You do the work , we supply the expertise "

22nd May 2024, 18:00	#4
planenut Regional Secretary Rover 1.8T Tourer Join Date: May 2007 Location: Heathrow Posts: 7,014 Thanks: 1,551 Thanked 2,036 Times in 1,264 Posts	One of my twin pair stopped working and eventually found a failed wire between the multiplug behind the headlight and the horn terminal. Fresh wire sorted it.

26th May 2024, 13:53	#10
Martin Butler Loves to post MGF1.8 Join Date: Sep 2021 Location: St Leonards Posts: 385 Thanks: 46 Thanked 72 Times in 49 Posts	I have just been looking at the wiring diagram and can someone clear up something i'm not 100 per cent sure of, mine has the later fuse box, with the mini fuses, Is it only the earlier cars that have the horn relay fixed to the pcb, because the earlier wiring diagram, says horn relay on rear of panel, showing 3relays, where as the later, shows it on the front, and 4 relays , i checked mine and there's 4 relays, I have started the process of checking, and there's no reading, at the horn plug, and no reading at the multi plug, I bridged the connection at the plug end with 12v direct and the horn sounded, so the fault is beyond the multi plug either the steering wheel wires, or relay