If the alarm makes the horn work, then it is not the relay.
It is the horn contact or slip ring.
You need to take the cover off the steering wheel center.
But this could be dangerous due to air bags.
Disconnect battery first.
Steering wheel might have to come off.
Recommend a shop because most people don't have the tools for pulling steering wheel.
I have a 02 lincon ls the 20th on this this month makes a mont I had it and just a few days ago I notice the fan starting to run all the time when I drive the faster I drive the loud it roar but it would not run hot. Last friday I drove it for about 30 minutes with the air on and I notice it was slight above the normal temp reading so when I turn the air off it went back down so on my way coming back wothout the air on it start to rise again but this time a little more faster and higher so i noticed when I cut my a/c on drove slow because of the rain that day it went completel back down to normal but as i increased my speed it begin to rise again and when I got inot town it started to rise more faster
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