Homer Posted November 12, 2023 Share Posted November 12, 2023 I've got an issue where the horn is on all the time. So far we've replaced the horns, tried a different steering wheel, changed the fuse, relay and checked the wiring for breaks. No issues found. I've been through the wiring diagrams for the horn circuit and it all seems to check out, all connectors are plugged in. When the small wiring connector on the steering wheel is disconnected the horn does not go off. With it plugged in the horn is on all the time regardless of whether the horn wire to the wheel is plugged in or not. Does anyone know what could be the cause? Am I connecting the horn wire to the correct terminal on the clock spring? Also is the horn breaking the circuit when pressed or completing it? It seems to be breaking the circuit since it pushed the metal connectors apart. Quote Link to comment Share on other sites More sharing options...
Homer Posted November 12, 2023 Author Share Posted November 12, 2023 Also when I got the car it had a UK steering wheel (pic below). The white plug only uses the right pin on the facelift steering column, the left one is unused). Does anyone know if the left pin is used for the horn mechanism on the facelift? Maybe the issue is that this isn’t reaching anything. The wiring is definitely different on facelift as there are different plugs used on the column to connect the horn wire Quote Link to comment Share on other sites More sharing options...
TuneR Posted November 13, 2023 Share Posted November 13, 2023 (edited) Does this help, looks to be far right one. Sorry i haven't learned how to embed on updated site lol. https://flic.kr/p/2oieFMq Edited November 13, 2023 by TuneR (see edit history) 1 Quote Link to comment Share on other sites More sharing options...
Homer Posted November 13, 2023 Author Share Posted November 13, 2023 12 hours ago, TuneR said: Does this help, looks to be far right one. Sorry i haven't learned how to embed on updated site lol. https://flic.kr/p/2oieFMq Thanks mate. That confirms I have it wired up correctly. I’m stumped. 1 Quote Link to comment Share on other sites More sharing options...
Burna Posted November 14, 2023 Share Posted November 14, 2023 9 hours ago, Homer said: Thanks mate. That confirms I have it wired up correctly. I’m stumped. Yes you have wired it up correctly, just one wire, and it sounds the horn when it's pulled to ground. So I'd say you have a point in the circuit that is touching the body of the car and grounding mate. Bell it out and re-check all the wiring for the horn circuit. Quote Link to comment Share on other sites More sharing options...
Homer Posted November 14, 2023 Author Share Posted November 14, 2023 21 minutes ago, Burna said: Yes you have wired it up correctly, just one wire, and it sounds the horn when it's pulled to ground. So I'd say you have a point in the circuit that is touching the body of the car and grounding mate. Bell it out and re-check all the wiring for the horn circuit. I've already been through all the loom I can get to (Much of it is behind the dash so dash out job to inspect!). I think I'm going to end up taking a new wire from the back of the plug, all the way through to the engine bay loom (and add a fuse of course). 2 Quote Link to comment Share on other sites More sharing options...
Homer Posted December 17, 2023 Author Share Posted December 17, 2023 Update to this. We found where the grounding is happening but am not sure how to fix it. After a process of elimination the ground is occurring between the plug that goes into the clock spring unit and the plug for the horn on the steering wheel. Bypassing this it works as intended. Does anyone know if the clock spring mechanism can be dismantled and checked? It’s one of those things I suspect isn’t easily serviceable… Quote Link to comment Share on other sites More sharing options...
Scooter Posted December 21, 2023 Share Posted December 21, 2023 Homer is the clock spring in the bit with wipers/indicator stalks go into? I have an old assembly (one of the stalks is gone/floppy hence why I swapped it out years ago) that I was going to bin that I could send for postage that you could experiment on if that would help? Quote Link to comment Share on other sites More sharing options...
Homer Posted December 21, 2023 Author Share Posted December 21, 2023 1 hour ago, Scooter said: Homer is the clock spring in the bit with wipers/indicator stalks go into? I have an old assembly (one of the stalks is gone/floppy hence why I swapped it out years ago) that I was going to bin that I could send for postage that you could experiment on if that would help? Thanks mate, that could really help. I'm going to take it off the car first and see if there's anything obviously wrong with it first. Part of it is shown on the 2nd picture on the first post (Black ring with the '5' sticker on it). Also shown here: Quote Link to comment Share on other sites More sharing options...
Scooter Posted December 21, 2023 Share Posted December 21, 2023 I'll grab a pic, it's all one piece at the moment and i think it's everything in that pic 1 Quote Link to comment Share on other sites More sharing options...
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