

| Subject: | Re: Help me diagnose and fix no brake lights |
| From: | Jim Felder |
| Date: | Fri, 9 Oct 2015 22:40:44 +0000 |
Very good! Jim On Fri, Oct 9, 2015 at 5:30 PM Pat Spragge/RFAN <Pat.Spragge@rfan.com> wrote: > This looks good... > > http://www.e38.org/understanding%20euro%20wiring%20diagrams.pdf > > > *Pat* > > > > From: Jim Felder <jim.felder@GMAIL.COM> > To: vanagon@GERRY.VANAGON.COM > Date: 10/09/2015 03:26 PM > Subject: Re: Help me diagnose and fix no brake lights > Sent by: Vanagon Mailing List <vanagon@gerry.vanagon.com> > 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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