Don't forget that there may be a resistance wire in the feed circuit to the
coil which limits voltage and available current. I found out the hard way when
We had a Pertronix ignition set-up being fed by the coil wire. That low voltage
starved the Pertronix unit twice before I realized what the issue was.
Alex Thomson
-----Original Message-----
From: Triumphs [mailto:triumphs-bounces@autox.team.net] On Behalf Of Randy and
Valerie DeRuiter
Sent: Sunday, April 9, 2023 5:31 PM
To: Brad Kahler
Cc: Triumphs
Subject: Re: [TR] (no subject)
Brad
I did a similar conversion a few years ago on a TR3 and Iâ??m fairly certain
that needs to be switched power to the unit. I donâ??t have a wiring diagram
handy but you may be ok adding the small brown wire to the same terminal as the
large brown wire - and run a separate connection for the switch power. The
positive coil terminal could be a convenient place.
Randy
Sent from my iPad
> On Apr 9, 2023, at 1:19 PM, Brad Kahler <bkahler1@gmail.com> wrote:
>
> 
> I'm trying to troubleshoot a problem with the new wiring in my TR6. Here's
> the configuration:
>
> 1) Mini Denso 70 amp alternator 3-wire
> 2) New wiring harness from TRF
> 3) Positive cable connected to battery
> 4) Between negative cable and ground I have a fuse inserted with a small amp
> meter (this way if a short occurs while testing the fuse will blow before
> damaging anything and I can read the current draw if/until the fuse blows)
> 5) White wire at distributor disconnected
> 6) No dash instruments connected
> 7) Rear harness not installed yet
> 8) TBI power connector not connected
> 9) Harness in engine compartment mostly connected
> 10) Alternator connected
> 11) Fuse between brown and purple wires is NOT in place
>
>
> When I connect the ground I immediately start showing a 4 amp draw. When I
> disconnect the small brown wire on the alternator the current draw
> disappears.
>
> The wires area connected as follows. The brown/yellow wire goes to the (1)
> connector on the alternator for dash light.
>
> The small solid brown wire goes to the (2) connector on the alternator called
> "switched live" from the battery. Currently the small brown wire is always
> live from the battery per Triumph design. If the "switched live' note means
> the brown wire is supposed to be cold when the ignition switch is off then
> that is likely the problem.
>
> All of this tells me the brown wire needs to be from the ignition switch on
> position and only live when the ignition is on. I don't have any way to
> really test my theory because I haven't got the engine running yet and won't
> for a few weeks. I'd like to resolve this before I go much further with the
> wiring install.
>
> Thanks,
>
> Brad
>
>
>
>
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