[ROVERNET - UK] P6 Tachometer

[Richard Elliott]

Larry,

To assist you with your tachometer question, here are
some earlier Rovernet posts on the topic.  For a
schematic, I found it in Haynes, pg 186, but I can't
find my magnifier to see the tiny color codes.



Richard Elliott
1970 P6B NADA Tobacco Leaf

  

--- Ron Morey <morey814 at hotmail.com> wrote:

> Damien, since you have recently aquired the car I
> suspect, cynical me, that 
> the problem was there before you bought it. I doubt
> it is related to the 
> electronic ignition-note the email that describes
> the low current fault-but 
> is more likely to be the tach electronics. If you
> know someone who is good 
> in electronics get them to replace all the
> electrolytic capacitors in the 
> tach and to check for bad connections or shorting
> transistors. These are 
> more likely the cause. The capacitors dry with age.
> Any time after 10 yrs is 
> not predictable. Transistors, especially old ones,
> dont like heat. It gets 
> real hot under that dash in the sun. I did this
> repair to the tach in my TC 
> about 15 yrs ago and have not had trouble since. It
> too was erratic and 
> would occasionally pin or jump about. The cost of
> parts will be about $10 or 
> less from an electronics supplier-not Radio Shack.
> No offence to Tandy.
> Hope this helps, Ron.
> 
> >From: "Damien" <koffee at iprimus.com.au>
> >Reply-To: rovernet at lyris.ccdata.com
> >To: <rovernet at lyris.ccdata.com>
> >Subject: [ROVERNET - UK] Tachometer and electronic
> ignigition P6
> >Date: Fri, 2 Jul 2004 12:36:47 +1000
> >
> >Hi I was wondering if this is usual. The 3500S I
> recently acquired has
> >electronic ignition (not sure of the brand) but
> either the tachometer
> >isn’t working or this motor loves revs it seems to
> stay up in the 6000 +
> >range as soon as I get over about quarter throttle.
> But my gut feeling
> >says it is the tacho is stuffed and not the engine
> being just too good
> >lol. Now is it the gauge or the electronic
> ignition. If it is the latter
> >how can I fix it? The gauge has 3 connections
> coming out of the back of
> >it, the only other one I have has 2 connections.
> Please help me as the
> >swinging needle is driving me mad
> >
> >Damien
> >
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