[spatha]

Hi all; My horn used to work flawlessly, but after my last oil change I noticed that after the engine gets up to exactly 176 (operating temp) the horn cuts out. It works at start up and until 174/175 engine temp then nothing. I've ordered a replacement OEM horn, but I'm curious if anyone has had the issue?

 

[rodent62]

That temp is when the thermostat opens. Does your fan come on around 190-195 or so ? Did a wire terminal get swapped or moved close by the front of the engine when you were taking off the oil filter ? I think you lost a ground somehow. IMO.

 

[spatha]

good point; the dealership did the last oil change (it was the 10k inspection too) so I'm guessing that is what happened.