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Old 04-03-2009, 12:49 AM   #1
budnikguy
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Dealer Option/NOS Trailer Brake Underhood Firewall Mounted ever see one?!

Just purchased a project '67 Fleetside shortbed and came across what I believe to be a dealer installed option for trailer brakes, it is installed on the firewall... By no means am i an expert on 67-72's but i have and have owned a few and have never ran across this item..

Any help/ comments please contact me here or directly at:
playersnmv@aol.com
Adam



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Old 04-03-2009, 10:04 AM   #2
liftmeup
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Re: Dealer Option/NOS Trailer Brake Underhood Firewall Mounted ever see one?!

Not dealer but a pretty connon part I have had 2-3 with that style Tb system. You could get them a Kragen and such back in early 70's
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Old 04-03-2009, 10:21 AM   #3
leddzepp
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Re: Dealer Option/NOS Trailer Brake Underhood Firewall Mounted ever see one?!

Hey neighbor-Congrats on the new truck!
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Old 04-03-2009, 06:13 PM   #4
budnikguy
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Re: Dealer Option/NOS Trailer Brake Underhood Firewall Mounted ever see one?!

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Hey neighbor-Congrats on the new truck!

Hey ledzepp, where do you live in Riverside...
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Old 04-03-2009, 10:36 AM   #5
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Re: Dealer Option/NOS Trailer Brake Underhood Firewall Mounted ever see one?!

I've got one on my truck for the trailer brakes.
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Old 04-03-2009, 06:35 PM   #6
leddzepp
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Re: Dealer Option/NOS Trailer Brake Underhood Firewall Mounted ever see one?!

I am off of Victoria and Harrison....Arlington area

Where u at?

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Old 04-03-2009, 08:17 PM   #7
msgross
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Re: Dealer Option/NOS Trailer Brake Underhood Firewall Mounted ever see one?!

moved to proper area...
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Old 04-03-2009, 10:34 PM   #8
Longhorn Man
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Re: Dealer Option/NOS Trailer Brake Underhood Firewall Mounted ever see one?!

very common type for back in the day... I am pretty sure this was the first of the electric brake style, as opposed to tapping into the brake lines like they did before.
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Old 04-03-2009, 10:42 PM   #9
msgross
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Re: Dealer Option/NOS Trailer Brake Underhood Firewall Mounted ever see one?!

looks like a mini mid evil electric chair or something...
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Old 04-03-2009, 10:48 PM   #10
El Jay
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Re: Dealer Option/NOS Trailer Brake Underhood Firewall Mounted ever see one?!

That's what was called a "voltadrop" back in the old days.

It's basically a ballast resistor.
U.S. cars & trucks went to 12 V in '56 (VW was 10 yrs later) and if one had a newer tow vehicle & a pre '56 trailer it needed the resistor to drop the voltage to 6 volts for the trailer.
Changing the lights was a piece of cake, just change the bulbs, but other stuff was another issue.
Brakes & other stuff were too expensive to change over to 12 volts, so a "voltadrop" was put into the electrical system between the tow vehicle & the trailer.

I hope I made some kind of sense here.

LJ
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Old 04-03-2009, 10:57 PM   #11
Longhorn Man
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Re: Dealer Option/NOS Trailer Brake Underhood Firewall Mounted ever see one?!

El Jay was there... he would know!
*edit*
Not ment to offend anyone, just messin messin with E.J.

Last edited by Longhorn Man; 04-03-2009 at 11:00 PM.
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Old 04-03-2009, 11:52 PM   #12
El Jay
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Re: Dealer Option/NOS Trailer Brake Underhood Firewall Mounted ever see one?!

Quote:
Originally Posted by Longhorn Man View Post
El Jay was there... he would know!
*edit*
Not ment to offend anyone, just messin messin with E.J.
You can't mess we me, Andy.
It's like water off a duck's back!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

You & me can eff with each other from now until forever; and it'll all be between just friends!!!
Know whut I mean, Jelly Bean?

LJ
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'69 Chevy 1/2 T LWB Stepper: Daily Beater
'72 GMC 3/4 T Fleet: Another Daily Beater
'72 Plymouth Gran Coupe: ?


"Ah women. They make the highs higher and the lows more frequent." Friedrich Nietzsche

"Never kick a fresh turd on a hot day." Harry S. Truman

GUN CONTROL: Never having to say, "I missed you."

Always fire two warning shots into your attacker's chest area before putting a bullet between his eyes. Paraphrased from Louis Awerbuck

Last edited by El Jay; 04-03-2009 at 11:55 PM.
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Old 04-03-2009, 11:04 PM   #13
sjarrett71
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Re: Dealer Option/NOS Trailer Brake Underhood Firewall Mounted ever see one?!

I was finally able to get the picture I have of mine (LOOOOONNNNNNNNG day at work). I hope it shows big enough to see it.

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Old 04-04-2009, 12:02 AM   #14
El Jay
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Re: Dealer Option/NOS Trailer Brake Underhood Firewall Mounted ever see one?!

Quote:
Originally Posted by sjarrett71 View Post
I was finally able to get the picture I have of mine (LOOOOONNNNNNNNG day at work). I hope it shows big enough to see it.

That's a "voltadrop" to be sure.
I hope my buddy, Andy, don't kick me in the nuts for identifying it!!!

Sorry "Cockroach"
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'69 Chevy 1/2 T LWB Stepper: Daily Beater
'72 GMC 3/4 T Fleet: Another Daily Beater
'72 Plymouth Gran Coupe: ?


"Ah women. They make the highs higher and the lows more frequent." Friedrich Nietzsche

"Never kick a fresh turd on a hot day." Harry S. Truman

GUN CONTROL: Never having to say, "I missed you."

Always fire two warning shots into your attacker's chest area before putting a bullet between his eyes. Paraphrased from Louis Awerbuck
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Old 04-04-2009, 12:29 AM   #15
Longhorn Man
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Re: Dealer Option/NOS Trailer Brake Underhood Firewall Mounted ever see one?!

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