Need Help figuring which horn to replace...
 

Ok, I have a 1989 911 Cab and am working on the oil cooler in the pass front fender. I noticed that one of my horns is broken. It is the one to the outside of the fender (not the one closest to the side). I can't figure out if it is the high or low pitch horn. Any ideas? Andrew

the horn with the longer trumpet is the low pitched one and the shorter one is high pitched.

if it is the actual trumpet portion that is broken and you can't compare them together it is only one nut to remove the horn in question and IIRC the part # is on the back of the electrical portion near the stud used to attach it to the car.

1974-1989 models
911 635 102 20--- low pitch
911 635 101 20---high pitch

If one doesn't work, put your hand on the horns while someone else honks it.

You can feel which one works.

tcar's explanation is right on how to figure out which one isn't working. However, wouldn't it be easier to get a new horn that was louder so people will actually be able to hear it?

Thanks. I will remove the horn and check the part number as it is the trumpet that broke off one horn.

which horns are most people using?