I have a positive ground pertronix electronic ignition. Will that work with
a negative ground conversion?
Ned Paulsen
Webster, NY
-----Original Message-----
From: Randall <tr3driver@ca.rr.com>
To: triumphs@autox.team.net
Sent: Fri, Jun 18, 2010 3:08 am
Subject: Re: [TR] Pos Ground v. Neg Ground
> My question is what are the
> visible signs of a
> switch from the original positive ground to negative ground?
There are really very few changes involved, and they are optional (the car
will function without making the changes), so it's hard to say. My
suggestion would be to decide whether you want positive or negative ground,
and proceed on that basis.
For negative ground, the "-" or "SW" terminal of the coil should be
connected to the distributor, the other to the wiring harness. For positive
ground, the "+" or "CB" terminal goes to the distributor.
The wires to the ammeter also get swapped. Easiest way to see which is
which is to apply a load of some sort (like turn on the headlights) and see
if the needle moves to "-". If not, then either reverse the wires to the
ammeter, or the battery polarity.
As far as the generator, after such a long snooze it is probably best to
repolarize it anyway, to whatever your chosen polarity is. With a charged
battery (or jumper cables from another car), just pull off the wire from the
'F' terminal on the control box on the firewall, and momentarily brush it
against the 'A' or 'A1' terminal. You should see a little spark, which
tells you the job is done. Reconnect the wire and resume awakening the
beast.
Randall
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