getting 12v from a 24v system?

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Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=74134
Printed Date: May 06, 2025 at 3:23 AM

Topic: getting 12v from a 24v system?

Posted By: 4187
Subject: getting 12v from a 24v system?
Date Posted: March 08, 2006 at 11:53 AM

I have customer with a 1986 military issued humvee with the 24v system. Does anybody have any ideas on how to get a 12v switched ignition out of this?

Replies:

Posted By: mad550
Date Posted: March 08, 2006 at 2:23 PM

A reducer and 24v relays don,t go from one battery as when charging you'll spike the alarm with 18-19v

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WOW Sight and Sound
Maroochydore
Nothing is impossible!
Do it right the first time or don't do it at all.

Posted By: xscash
Date Posted: March 08, 2006 at 10:42 PM

not only that....when drawing from 1 batt. the vehicle will not see the draw from that batt and increase the charging on the system....this will result in a dead batt situation. i found this to be in every case a radio was mis wire in any costuction equipment.

Posted By: 4187
Date Posted: March 09, 2006 at 10:43 AM

where can I pick up a 24v relay?

Posted By: KPierson
Date Posted: March 09, 2006 at 12:02 PM

You can pick up a 7812 from Radio shack if your output needed is less then 1A.

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Kevin Pierson

Posted By: xscash
Date Posted: March 09, 2006 at 6:42 PM

look in jc whittney...they always have some retarded part that everyone will need some day....24vdc-12vdc converter

Posted By: datspeed77
Date Posted: March 29, 2006 at 2:25 PM

KPierson wrote:

You can pick up a 7812 from Radio shack if your output needed is less then 1A.

Or you pick up a 7812 to run the trigger for a 30amp relay! Haven't worked on any 24V systems yet. Looks like it'll be fun.

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