[Vwdiesel] Diesel Tachometer in an older VW

[Kurt Nolte]

Was that Audi 90 a gasoline powered car? The W terminal and Terminal 15 
on a gasser's coil do not output the same signal, so a tachometer 
designed for one will not be driven by the other. Not accurately, at least.

-Kurt

Tony and Lillie wrote:
> And, that brings up my question. I have an 82 Jetta NA that has the Bosch 
> alternator, and I have run a wire from the "W" terminal into the car. I 
> finished most of the wiring for the Audi 90 dash I'm putting in it. When I 
> fired up the car, the tach read about 4800RPM with teh car at idle. As I rev 
> it up, the tach goes to teh end, then drops back sown to 4800 to start all 
> over. What is wrong here? I was so excited to finally have a tach, then 
> this...........
>
> Tony Hoffman
> ----- Original Message ----- 
>
>   
>> D+ is for the idiot light/field excitation
>> B+ is to the Pos. battery terminal
>> W is a "tach" signal (AC)  Used for upshift light on earlier diesels and
>> also a tach on the A2's.
>>     Loren 
>>     
>
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