Howto Stop Back Up Horn!!!!
[sm=icon_rock.gif]Ok I said I was going to do this as soon as the scanner at work was fixed. The scanner is fixed so here is the $10 fix to annoying back horn.
DISCLAIMER: I do not have a truck that has this problem and have not tried this on any truck. This assumes normal wiring (2 wires to horn, 2 wires on switches, etc.). I do not know if this actually works, it was just an idea I had based on how my truck is wired. If you try it and it does not work, you have been warned so no snivelling![sm=boohoo.gif]
If you try this and it works or need to modify it to work, please post the results here so everyone else will know what to do. If I had a later model truck, I'd try it on my vehicle, but this problem does not exist on the 01 CTD.
Here is how it works. When the reverse light comes on it closes the relay so that no juice goes to the horn. The only problem is that the horn does not work at all when the truck is in reverse. So the second option shows how to disable the juice to the horn while backing up, but if you push on the horn switch on the steering wheel you still get a horn, although the automatic honking horn is disabled.
All you need is a little wire and a DPST relay that you can get at radio Shack or the elctrical section of your favorite autoparts store.
Hope you can read my hand writting.