[T3] DOT 5 and brake light switches

[William Sills]

I have a 66 bus, still 6volt, and just like Jim described, whenever I step on the brakes there is a click from the turn signal relay. At this point I kind of like it, as it's an audible way to know my brake lights are working!

The signal relay in my 64 notch is so quiet, I can't even hear it when the blinkers are on, so I don't know I that one does it too. That car is also still 6 volt. -Bill. 

Sent from my iPhone

> On Nov 19, 2015, at 9:46 AM, "Jim Adney" <jadney at VWType3.org> wrote:
> 
>> On 19 Nov 2015 at 9:18, Sean Bartnik wrote:
>> 
>> Hmm that's interesting, maybe it is indeed coming from the flasher
>> relay. Doesn't sound like it though; it's not as loud as the normal
>> click of the flasher relay when, for example, the turn signals are
>> engaged. Sounds farther away and muffled, like I'm hearing it through
>> the bulkhead.
> 
> On cars before '71, the TS relay contains 2 separate internal relays. 
> On my '68, the system transient caused only one of them to click, and 
> it wasn't the one that made the TS lamps flash. When you're actually 
> using the turn signals, both relays click, so, yes, the brake light 
> click was quieter.
> 
> The second relay in there is part of the system VW used to sense 
> whether all the bulbs were working. If you lost a bulb, the second 
> relay would not click and that made the relay clicks happen faster. 
> It's a complicated system and it took me a long time to figure out 
> how it worked. Not sure I still remember the details.
> 
> -- 
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
> 
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