RE: [T3] wire in battery tray area

[Jim Adney <jadney@vwtype3.org>]

On 14 May 2004 at 6:29, Kevin Guarnotta wrote:

> Special battery? I'm intrigued tell me more.....

> From: Jim Adney [mailto:jadney@vwtype3.org] 
> 
> These 3 would have connected up to the 2 ends of the battery ground cable,
> while the third one went to a water sensor in the top of the special
> battery.

The special battery had a lead probe which stuck down from the top into one of 
the cells. If the water level was high enough it touched that probe and there 
would then be voltage on that terminal. The Computer Diagnosis system could 
sense that voltage and would assume that all the rest of the cells were equally 
full.   

If there was no voltage there, then the CD system would tell you to add water.

OE batteries came with that sensor there, but I don't know if there were even 
replacements available with it. IIRC, I bought a new battery from the dealer in 
the early 70s and it didn't come with that sensor. 

I think I may have one or two of those sensors saved downstairs, just in case I 
came across a battery that I could use it in. They were just a light press fit 
into a hole molded into the top of the battery.

-- 
Jim Adney
jadney@vwtype3.org
Madison, WI 53711-3054
USA

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