

| Subject: | Re: Help me diagnose and fix no brake lights |
| From: | SDF ( aka ;jim lahey' - Scott ) |
| Date: | Sat, 10 Oct 2015 16:45:52 -1000 |
'short in a connector' ? perhaps you mean 'an open' in a connector ...?? On 10/10/2015 2:45 AM, Jim Felder wrote: > I had a 1990 Vanagon bought new. In about 2000, I was working in an office > when someone cam in saying "you left your light on." I checked and it was > the brake lights, which I could not make go off. I was able to use the > googles on the inter webs in cyberspace to find the answer:both OEM > switches had failed at ten years. > > As far as I know, my 83 diesel camper had the original switches in it two > years ago when I replaced all the brake stuff top to bottom, the switches > included. The ones in the car were replaced for good measure, not because > they had failed. > > As it turned out, I did not need to buy two new switches yesterday. The > problem was a pesky one, a short in a connector, and was unique enough to > my vanagon that nothing that specific came up on the googles, that would be > like googling the pain in your foot and reading an article about how you > had a thumbtack in your left shoe near the second toe. > > Anyway, brake lights are one of the most important safety features on the > car, and I don't mind knowing that at least my switches will be good for a > few more years. With old cars like these, it's probably a good idea to back > into your garage once a month just to see if you can see if the lights are > working. > > Jim > > > On Fri, Oct 9, 2015 at 6:32 PM SDF ( aka ;jim lahey' - Scott ) < > scottdaniel@turbovans.com> wrote: > >> Hi Jim, >> yep ..I hear ya. >> altho .. >> I have had numerous cases recently where I would never know or be able to >> find out something.. >> unless I asked online. >> >> Have you always wondered what ( WTF ) time , for tv shows , for example >> 9/8C is ? >> >> I sure have .. Never could figure that one out, and it does not correlate >> with time zones. >> I ask online .. >> another person is asking that just like me. >> >> A guy answers ..some guy from TV networks .. >> no direct logic either ..but I did find out 9 /8C is 9 o'clock >> ............the first number on the west coast that applies. >> NEVER could have figured that out otherwise.. >> perhaps call a TV station ....wouldn't surprise me if they didn't know >> either. >> >> I google 'all the frickin' time' ! >> The world's biggest library right at our fingertips. >> >> you probably could find forum conversations about 'vanagon brake lights >> not working' ..in just seconds. >> >> yeah..this page is covered with that exact topic...many entries. >> took all of 4 seconds if that. >> I googled 'vanagon brake lights not working' to find these listings. >> >> >> https://www.google.com/webhp?sourceid=chrome-instant&rlz=1C1TLCE_enUS574US654&ion=1&espv=2&ie=UTF-8#q=vanagon%20brake%20lights%20not%20working >> >> On 10/9/2015 12:52 PM, Jim Felder wrote: >> >> I have the googles, but have spent the day actually fixing the issue. Not >> looking for DIN wiring standards directly, as I was occupied with a >> voltmeter and the wiring system before me. Interesting in retrospect, >> though. Thanks for the tip to use the googles. >> >> Jim >> >> On Fri, Oct 9, 2015 at 5:49 PM SDF ( aka ;jim lahey' - Scott ) <scottdaniel@turbovans.com> wrote: >> >> >> it was amazingly difficult to google >> " DIN wiring standards' or whatever I put. >> >> in all of 1.06 seconds this pops up .. >> http://www.bosch-automotive-tradition.com/media/en/automotive_tradition_1/teile_1/switches/downloads_3/klemmenbezeichnungen.pdf >> >> you maybe no have google ???? >> you could/should search yourself some ...about half a dozen interesting >> things popped up ...all related to this topic. >> More than that even. >> >> >> S. >> >> On 10/9/2015 12:26 PM, Jim Felder wrote: >> >> 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> <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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