12V to 24V or 24V to 12V

I wounder how to properly hook up a 12V air horn on a 24V system?

I know its not 100% 3rd gen but a guy I know is requesting air horns or two note hi/low GM horns to send to Iraq for these monster things called Cougars that got a MASH 4077 beep beep jeep horn and they can't get them through normal channels so folks are just sending anything thing they got. I thought about sending two air horns to wire in line to use up 24V but their has to be a better way.

Plus I couldn't afford two Dixie horns to send
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You can see here how you need more then a beep beep horn to get folks out of the way. That sound just doesn't let foks know they better look back and move.

 

HAHAHHAHAHAHAH!!!

I am in afghanistan working on these things now!!

Well, this is much easier than you think. You need to run your 12v power supply from the second battery in series on the truck. Let me quickly explain.

These trucks don't use 24v batteries, they use two 12v batteries in series. The first one is where the 24v positive comes from for the wiring system. The second one has the negative hooked to the chassis for your ground. There is a battery cable jumper that hooks from the negative of the first battery to the positive of the second battery and that hooks both batteries in series for your 24 volts.

You need to use the 12v power supply wire for your air horn solenoid and hook it to the jumper between the batteries. That gives you your 12vdc to run your 12v accessories. There are already some things running 12v on that truck that are hooked up the same way usually.

Good luck and thanks for supporting us over in this craziness!!

 

Well thats cool,

Here is his mailing address, so I dunno his location but ya never know if ya might cross his path by the sound of his horn.

So I could send him a Dixie horn [General Lee horn] He says it would be ok but I dunno if it would not send off a "PC" alert. Since the Rebel Flag is affilated with that horn.

FOX News teaser before a break "Next up on the FOXnews: reports of racist horns being used in the war on Terror? All that and allot more next........."


LIONEL RODRIGUEZ
755 AEG/DET
CAMP PHOENIX
APO, AE 09320
AFGHANISTAN

 

hope that inserted the picture or you can use a voltage doubler like we use on our class 8 trucks, the transmissions are designed overseas which uses 24 volts instead of 12 so we have to use the voltage doubler on the transmissions you can find them on the freightliner columbia and century class trucks easily.
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