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Re: third brake light.
GhostRyder #516825 December 01st 2011 10:27 pm
Joined: Jul 2011
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frske1, if you have to draw it up with a pink crayon, label it, then scan it to post on this sight, it would make things a lot easier for the rest of us to understand what you're thinking?


Gone vannin' I'll call you later.
Re: third brake light.
aftoyboy #516866 December 02nd 2011 5:47 am
Joined: May 2007
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Originally Posted by aftoyboy
it would make things a lot easier for the rest of us to understand what you're thinking?



I DOUBT IT ! rofl and really, do we WANT to know what he is thinking? rofl


My van : 1989 Ford E-150 Econoline, currently named “WOLF-DEN II”


Founder & President of Sooner or Later United Truckers and PROUD TO BE A S.L.U.T. ! !
Re: third brake light.
GhostRyder #516880 December 02nd 2011 7:30 am
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Originally Posted by GhostRyder
thanks Nate , wth is frcske talking about ?


rofl


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Re: third brake light.
Uncle_Fester #516959 December 02nd 2011 12:57 pm
Joined: Oct 2001
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Originally Posted by Uncle_Fester
Originally Posted by aftoyboy
it would make things a lot easier for the rest of us to understand what you're thinking?



I DOUBT IT ! rofl and really, do we WANT to know what he is thinking? rofl


He's prolly thinking how to get more clear spots in his van lol


Ken Schwarz
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Re: third brake light.
aftoyboy #516961 December 02nd 2011 1:04 pm
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Originally Posted by aftoyboy
frske1, if you would draw it up with a pink crayon, label it, then scan it to post on this sight, it would make things a lot easier for the rest of us to understand what you're thinking?


yeah rofl


Ethan

Its a VAN not a CAR

1995 Chevy 30 6.5 diesel wo/windows

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Re: third brake light.
NateB #763266 July 05th 2020 7:18 pm
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Originally Posted by NateB
Since the brake light circuit passes through the turn signal switch, most manufacturers have the 3rd brake lamp on a seperate circuit. You'll need splice into the wire coming right off the brake light switch....before the turn signal switch.

Ever get behind someone at a stop light and notice that the only brake light working is the 3rd one? Other than possibly being bad bulbs, usually that means the person's turn signal switch is bad.



I just installed high top and am a bit confused on how to splice this in. Do I splice in the rear of the vehicle or does it need to be right at the switch?


1977 Chevy G20 Ramjet 350 4L80E 4x4
Re: third brake light.
jtozier406 #763277 July 06th 2020 7:17 am
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Originally Posted by jtozier406
Originally Posted by NateB
Since the brake light circuit passes through the turn signal switch, most manufacturers have the 3rd brake lamp on a seperate circuit. You'll need splice into the wire coming right off the brake light switch....before the turn signal switch.

Ever get behind someone at a stop light and notice that the only brake light working is the 3rd one? Other than possibly being bad bulbs, usually that means the person's turn signal switch is bad.



I just installed high top and am a bit confused on how to splice this in. Do I splice in the rear of the vehicle or does it need to be right at the switch?


At the brake light switch. If you splice at the rear lights, the 3rd brake light will blink when you hit the turn signals.


Nate Breece
Re: third brake light.
NateB #763690 July 18th 2020 12:50 am
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journeyman
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Originally Posted by NateB
Originally Posted by jtozier406
Originally Posted by NateB
Since the brake light circuit passes through the turn signal switch, most manufacturers have the 3rd brake lamp on a seperate circuit. You'll need splice into the wire coming right off the brake light switch....before the turn signal switch.

Ever get behind someone at a stop light and notice that the only brake light working is the 3rd one? Other than possibly being bad bulbs, usually that means the person's turn signal switch is bad.



I just installed high top and am a bit confused on how to splice this in. Do I splice in the rear of the vehicle or does it need to be right at the switch?


At the brake light switch. If you splice at the rear lights, the 3rd brake light will blink when you hit the turn signals.


Hey Nate,

I haven't quite figured this out yet but I am looking to insulate, I am running some wire to different areas in the van before I seal everything up. To prep for wiring this light do I just need to send one wire to the switch under the dash? I am guessing I would wire this to the positive on the light and then the negative I would ground to the body of the van in rear?

Thanks!


1977 Chevy G20 Ramjet 350 4L80E 4x4
Re: third brake light.
GhostRyder #763691 July 18th 2020 2:49 am
Joined: Apr 2010
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Yes, run a single wire from the brake light switch to the third brake light location, and you can pull ground from nearby bare metal.



Assuming you are using a LED third brake light, which do not pull much current, and do not require thick wire to pass small currents, then running copper Zip wire( which is 2 joined wires like speaker wire) is no more difficult, and you can just ground it nearby the brake light switch rather than grounding nearby the light, but its your call. Lots of red/black zip wire, is aluminum or copper clad aluminum. You really want copper, so if they do not state pure copper or the price seems too good to be true it is aluminum or copper clad aluminum

Now a lot of people tap into the wire using one of those wire strand breaking press lock snaps. The previous owner of my van did this for a trailer brake, and 9 of the 20 strands were severed in the process, and corrosion ensued and caused nightmare diagnostic issues that induced the fury which launched various tools into low earth orbit followed by a stream of curses still orbiting the planet years later

Looking at a pic of a 77 g20 brake light switch, they use 1/4 inch quick connect fittings at the switch Here is a Piggy back connector so that you do not need to use one of those horrible wire destructing wire taps, or stuff bare wire in the existing connector which will later pull off and fail when Murphy dictates:

https://www.amazon.com/Ancor-230612...1-1-22d05c05-1231-4126-b7c4-3e7a9c0027d0



https://www.rockauto.com/en/catalog/chevrolet,1977,g20,5.7l+350cid+v8,1045178,electrical-switch+&+relay,brake+light+switch,10474

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