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Jul 21st, 2025 | | | | Joined: Jun 2004 Posts: 66 Wrench Fetcher | | Wrench Fetcher Joined: Jun 2004 Posts: 66 | I've acquired an older Warner trailer brake controller. It looks like it's from the 40s-50s vintage. I compared the inside of it from a later warner trailer brake controller and the contacting "fingers" look thicker on the later one. By look at just this difference I was wondering if this would make that older controller a 6-volt? If so, will it hurt anything if I ran 12-volts through it to control the brakes on a 2-axle trailer? | | | | | Joined: Feb 2004 Posts: 28,674 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 28,674 | Most of the magnet coils on electric brakes are 6-volt anyway. That's why it's necessary to install a tuning resistor on most applications to prevent brake lockup, especially if you're using brakes on both axles and wiring them in parallel. The 2-coil tuning resistor with a sliding adjustment will let you tune the brake response. It's avery good idea to use it no matter whioch controller you're using. The current should be adjusted so you can just barely lock the trailer wheels with the brakes fully applied.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Nov 2000 Posts: 1,927 'Bolter | | 'Bolter Joined: Nov 2000 Posts: 1,927 | That's interesting... I did not know that about the brake magnet coils being 6 volt. I have been wondering/dreaming how I can pull a small camping trailer with my 6 volt 50 3600 and get the brakes to work.
Professional Novice
| | | | | Joined: Jul 2005 Posts: 2,031 Shop Shark | | Shop Shark Joined: Jul 2005 Posts: 2,031 | if it were me and i was to use a brake controller for my trailer i'd make sure i have GOOD brakes and a prodigy unit. http://www.tekonsha.com/product/default.aspdon't think safety after nostalgia 
Last edited by carolines truck; 04/17/2009 3:23 AM.
Jim & Caroline
The highway is for gamblers, better use your good sense."
Gooday-that's my 1¢ answer due to the lousy economy ~ cause I ain't got - no . mo . doe
Every Shaver | Now Can Snore | Six More Minutes | Than Before ... | Half A Pound for Half a Dollar | Spread On Thin | Above the Collar || BURMA-SHAVE
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