horn replacement help
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New User
Joined: Mar 2003
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horn replacement help
Anyone replace their OEM horn? I need to replace the horn on my 97 expedition. my new hella horn has 2 plugs a positive and negative. However the original horn (FIAMM) only has one lead to plug the wire to. What's the best way to wire it up? thanks!
Tuned
Joined: Jan 2005
Posts: 261
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I believe that the factory horn is grounded through the mount, and a switched positive signal makes it make noise.
The Hella has separate inputs because many imports through the years have had a switched ground as the signal to tell it to make noise. (Positive to the horn all the time) Like on my MG Midget...
SO, make a wire with leads and permanently ground the negative side to chassis ground, and you should be good to go.
Option 1: Go to a junkyard and get a direct bolt on and properly wired horn set that will sound like the original horn...
The Hella has separate inputs because many imports through the years have had a switched ground as the signal to tell it to make noise. (Positive to the horn all the time) Like on my MG Midget...
SO, make a wire with leads and permanently ground the negative side to chassis ground, and you should be good to go.
Option 1: Go to a junkyard and get a direct bolt on and properly wired horn set that will sound like the original horn...
Elder User
Joined: Sep 2003
Posts: 753
Likes: 2
From: Oklahoma
I replaced my OEM horns. I did so because their placement causes them to fill up with water if you drive thru big puddles.
My replacement horns also had 2 leads. I wired mine the same way that racerock described and everything worked just fine.
Now I just need to make a deflector to keep the water out of the new horns!
Later,
Tim
My replacement horns also had 2 leads. I wired mine the same way that racerock described and everything worked just fine.
Now I just need to make a deflector to keep the water out of the new horns!
Later,
Tim
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Joined: Mar 2003
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Thanks got it all wired up, and working. The horns came with a relay, but I used the stock horn relay, seems to be no difference in loudness or tone. dakota I see what you mean by water getting in there. I'll have to figure out a deflector of some sort.
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