(07-12-2014, 02:22 PM)Patman99 Wrote: The only issue with earthing through the stearing column is that you may trigger a fault code or throw-up an engine diagnostics warning light.
The reason why earthing as you have works is that it earths via a path other than the designed one, so may cause issues elsewhere on the electrical system.
Do you have any more info on this? I ask as my Berlingo has had an indicated over-heating problem for a while, yet it's had all new everything (Rad, upper/lower hoses, water pump, thermostat, and coolant) except for oil cooler and various minor pipes.
Maybe clutching at straws as the fuel gauge works fine, but I wondered if the separate earth lead I ran from the chassis to the steering column could cause erroneous readings.
The weird thing is, it easily drops to 80C now the weather is colder, but still rises to over 90C if under any hard acceleration or going over about 70 on the motorway or up a hill.
anyway, to the OP: I had the problem with the horn, but it seemed to resolve itself just by taking the airbag off, giving everything a spray of contact cleaner, and re-assembling.Â I installed the seperate earth first, it didn't work.Â The horn was fine with the key in accessory position, but did not work with the engine running.Â