Date: Fri, 9 Oct 2015 22:26:21 +0000
Reply-To: Jim Felder <jim.felder@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Jim Felder <jim.felder@GMAIL.COM>
Subject: Re: Help me diagnose and fix no brake lights
In-Reply-To: <56183EC2.4070300@turbovans.com>
Content-Type: text/plain; charset=UTF-8
Let us know if you find that list.
Jim
On Fri, Oct 9, 2015 at 5:25 PM SDF ( aka ;jim lahey' - Scott ) <
scottdaniel@turbovans.com> wrote:
> that reminds me ..
> somewhere I found, online, a whole list of 'DIN' standards for wiring
> diagram symbols and such.
>
> this list also tells what numbers are used in terminal naming ..1 is
> always ground,
> 15 is always key on power, etc. Very useful list.
>
> also that the very beginning of the electrical section of Bentley I think
> there's a list of symbols.
>
>
> On 10/9/2015 11:40 AM, Jim Felder wrote:
>
> Regarding scott's observation that it takes more pressure on the pedal than
> you think to operate the brake lights—I cut a 3/4 inch dowel that jams very
> tightly between the underside lower steering wheel and the brake pedal.
> It's there when you want it, not when you don't, and it puts considerable
> pressure on the system. Five minutes on full down is plenty enough to see
> if your connections are weeping brake fluid, another benefit.
>
> Also Scott's observation that the Bentley diagrams require a lot of study,
> that's true too. You need it right there as you look and look and look. It
> would help to know what all the symbols are, maybe that's in there but I
> didn't find it but ended up figuring it out.
>
> That 4-pin connector that red-black goes through that goes through the
> firewall--it has four wires coming in and its mate going to the under dash
> harness only has three wires. Go figure why they dead-ended that one wire.
>
> Jim
>
> On Fri, Oct 9, 2015 at 4:12 PM vw_van_fan_Mark <madvws@cox.net> <madvws@cox.net> wrote:
>
>
> Only 80-84 vans have the brake failure warning setup. These use 3 wire
> switches to supply the signals to the dash warning module and the rear
> brake lights. 85-91 vans use 2 wire switches, only for the rear brake
> lights.
>
> For some reason new switch quality seems low and the supply of new 2
> wire switches is even lower.
>
> Mark
>
>
> SDF ( aka ;jim lahey' - Scott ) wrote:
>
> re this brake warning light module K ...
> .................
>
> Obviously the swtiches , one or both I imagine, turn on the brake lights.
> the 'other function ' is for a legally required brake failure warning
>
> light
>
> in this system I'm pretty sure that if there is a significant difference
> in pressures between the two circuits
> ( like say a rear wheel cylinder is leaking badly ) ..
> the two brake light switches tell this info to the module ..
> the module sees 'no pressure in one side' compared to the other
> circuit. thus turning on the warning light .
>
>
>
>
>
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