Corsa b 2000 horn problem
2000 Vauxhall Corsa Club 3cylinder 998 cc

Frank Hird
1 points

Problem added: Mar 8, 2021 (1 month ago)
Car was centrally locked and alarm set. No previous issues. Horn came on on its own. It wasn't the usual intermittent tone usually heard when the alarm goes off it was permanently on. The only way to stop it was to disconnect the battery. There is a power sounder next to the horn but this didn't come on when the battery was disconnected. Reconnecting the battery made the horn come on again. Switching on the ignition and starting the engine doesn't help either. So not sure if it is the power sounder, the horn relay or some other problem. Not sure where the relay would be. Any ideas?

Car details
Car: Vauxhall Corsa
Variant: Club 3cylinder 998 cc
Model Year: 2000
Category: Electrics, ECU, Warnings & Lights
Replies and Fixes
18,349 points

Mar 8, 2021 (1 month ago) Edited on Mar 8, 2021 (1 month ago)
This is for a 2000 Corsa C . Have no schematic for older Corsa

For the Opel/Vauxhall Corsa C 2000, 2001, 2002, 2003,2004, 2005, 2006 model year.

Relay box Opel/Vauxhall Corsa C.

In engine compartment .

relay box layout.




Central locking relay- locking (driver’s door)


Central locking relay- deadlocking


Central locking relay-unlocking


Central locking relay-locking


Alarm system horn relay


Licence plate lamps relay


Rear screen washer pumprelay


Wind screen wiper motor relay-fast


Horn relay


Windscreen washer pump relay


Windscreen wiper motor relay-slow/intermittent


Rear screen wiper motor relay


Indicator relay – LH


Indicator relay – RH
Frank Hird
1 points

Mar 8, 2021 (1 month ago)
Thanks for your reply. Unfortunately no box in engine compartment but I can see two relays above the fuse board situated to the right of the steering column. I don't know if there are others. I loosened the screws holding the fuseboard in but it won't come out. I think the wiring behind is very tight and I may have to remove the cover where the ECU is to loosen the cables to get better access.
18,349 points

Mar 8, 2021 (1 month ago)
See if this is better ,
Frank Hird
1 points

Mar 8, 2021 (1 month ago)
Thanks again for your response. There seem to be several variations and I have yet to see the right one. Although the car is an X reg Corsa club I think it falls in the 1997-2000 range. I have checked under the right pillar and there is only the ECU, no relays as shown in one of the diagrams in your link. I will look at the fuse board in more detail. Definitely no fuses or relays under the bonnet.
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