I just had a thought, if the "good electrical shop" ran a wire to the
12v input from the LT side of the ignition (switched via the points)
then it would be getting on average, what, 8v with a 60deg dwell and
could account for low readings.
Skye
66 B
Word on the street is Charles & Peggy Robinson said:
> The white wire loop is probably not at fault. No one opened up the
> tach, did they? A loose or bad connection there would make the engine
> run roughly. The tach is an electronic unit with the loop as the
> trigger source. As such, the tach needs to be connected to 12 volts and
> a good ground. I have one of that type tach in front of me now. There
> are four connections. Two are bullet connections for the white wires.
> Two are blade connections for 12 volts and ground. The 12 volt
> connector is located on the PC board between the bullet connections.
> That's probably where the electrical shop connected the new wire. I'd
> get behind there and find the original wire in the harness and connect
> it back up, eliminate the extra wire and make sure the ground is
> connected correctly.
>
> I ran into this with an MG I bought on spec. One of the probs was that
> the tach didn't work. The reason was as above. In other word, BTDT.
> YMMV but it's worth a look.
>
> Cheers,
>
> CR
/// or try http://www.team.net/cgi-bin/majorcool
/// Archives at http://www.team.net/archive
|