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Old 02-12-2016, 01:34 PM   #11
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Originally Posted by richhop25 View Post
There have been a number of posts about the limitations of the horn circuit and the computer electronics on the MB. Seems some have had an issue with the computer recognizing a current draw larger than 15 amps as a major flaw. Most horns worth their screams are rated in the neighborhood of 13 to 20 amp draws. So, I took the safe avenue and used the horn circuit as it exists to pull in a separate relay (less than one amp). The relay that comes with the horn works fine in this application.
I think the way you went is great! Just curious if the standard circuit was adequate. I am also in the better safe than sorry way of doing things.

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Old 06-26-2016, 02:54 PM   #12
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I bought a dual horn setup (F-150 hi-lo) and installed it yesterday. After arguing with myself about where to get the power source, I used the same as richhop25. I used a male spade connector instead of modifying one. I also mounted mine on the drivers side. I ran the control (relay coil) wires across the front just below the top of the grill. Sounds more like a truck now instead of a roadrunner cartoon...meep meep

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