Mechanics

WHERE DO I FIND A HOT-WHEN-ON UNDER HOOD CONNECTION

2004 Nissan Frontier • 13,000 miles

Wiring for air horns recommendation was for dash switch, instead want hot-when-on connection to 12v system preferably on the passenger side.
The air horn wiring includes a connection to the existing horn.
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Rbul1
April 30, 2012.




If you just use a dash switch it will melt you need to wire in a relay to carry the load of the air pump.I would just wire it to the battery with the correct fuse size. Also use the horn wiring for the relay trigger to make the horn go off.


Saturntech9
Apr 30, 2012.
The air horn kit includes a relay & a connection to the factory horn as a 'trigger'. I wish to cicumvent the extra switch inside the cab by using a hot-when-on connection under the hood on the passenger side.
Better yet a ground-when-on connection ( doubtful that exists).
I tried a gnd to the provided relay which allows all horns to work together, but of course this would put a drain on the battery with the key off.
I would have provided an attachment indicating the wiring diagram, but the forum system doesn't allow for attachments.
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Tiny
Rbul1
May 2, 2012.
You need to follow the instructions in the kit. When you do, you will realize that there will be no drain when it is off. It is a simple set up and is reliable. Give it a chance

Roy


As I stated the instructions call for a switch inside the cab which would be a big inconvenience (adding an additional horn button).
If there is a place to access the existing horn button wiring under the dash I would like to know where.


Tiny
Rbul1
May 10, 2012.
I posted a wire diagram for the horn circuit that should help you out.


Saturntech9
May 11, 2012.

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