Horn not working - Page 2

planenut · 26th May 2024, 15:22

Martin, on my 1.8T the multiplug for the, horn sits behind the offside headlight.

SD1too · 26th May 2024, 15:23

Quote:

Originally Posted by Martin Butler

... mine has the later fuse box ... the later, shows it on the front, and 4 relays , i checked mine and there's 4 relays ...

OK, so if the horn relay is plugged-in, rule it out by temporarily substituting another. But I'd say it's more likely to be the rotary coupler. Another member had a similar fault recently (link) and that's what it was I seem to remember.

Simon

planenut · 26th May 2024, 15:33

Martin, sorry this is the best I can do.

You can check the continuity of the wires from the horn to this plug/socket. As suggested by others, sometimes due to flexing of the old wiring by removing the bumper, these can get broken.

Good luck
Fred (planenut)

daveo138 · 26th May 2024, 19:12

I just happen to have my steering column cowl apart at the moment, as I’m diagnosing a possible rotary coupler fault on my cruise control.

If you disconnect the 6-way plug from the coupler and link the black wire on the left (ground) to the purple wire on the right (horn), the horn should sound. That will tell you if it is the rotary coupler or not.

Martin Butler · 30th May 2024, 20:10

My plug is further back, under the washer bottle, I had to pull out the side of the front bumper to get at it, I have been able to check the wiring from the connector to the horn, and that's ok, so the fault is between the plug and relay / fuse, but I have not been able to find the time to do any more just yet, Sometime I have got to have the front off again to fit new bonnet cables, and identify where my washer bottle is losing fluid from, I will see if the cable has gotten trapped behind the water bottle whilst i have the washer bottle off.

26th May 2024, 15:22	#11
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	Martin, on my 1.8T the multiplug for the, horn sits behind the offside headlight.

26th May 2024, 15:33	#13
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	Martin, sorry this is the best I can do. You can check the continuity of the wires from the horn to this plug/socket. As suggested by others, sometimes due to flexing of the old wiring by removing the bumper, these can get broken. Good luck Fred (planenut)

26th May 2024, 19:12	#14
daveo138 Gets stuck in Rover 75 Tourer Join Date: Mar 2022 Location: Chesterfield Posts: 728 Thanks: 206 Thanked 69 Times in 53 Posts	I just happen to have my steering column cowl apart at the moment, as I’m diagnosing a possible rotary coupler fault on my cruise control. If you disconnect the 6-way plug from the coupler and link the black wire on the left (ground) to the purple wire on the right (horn), the horn should sound. That will tell you if it is the rotary coupler or not.

30th May 2024, 20:10	#15
Martin Butler Loves to post MGF1.8 Join Date: Sep 2021 Location: St Leonards Posts: 385 Thanks: 46 Thanked 72 Times in 49 Posts	My plug is further back, under the washer bottle, I had to pull out the side of the front bumper to get at it, I have been able to check the wiring from the connector to the horn, and that's ok, so the fault is between the plug and relay / fuse, but I have not been able to find the time to do any more just yet, Sometime I have got to have the front off again to fit new bonnet cables, and identify where my washer bottle is losing fluid from, I will see if the cable has gotten trapped behind the water bottle whilst i have the washer bottle off.