I changed the harness on my TR-3 several years ago. Really no problem. Must
admit that the car was stripped so I didn't have to contend with engines,
seats, etc., in the way. The TR-3 harness is fairly simple and installation
points are relatively intuitive. Most difficult part was feeding the main
harness through the firewall. Can't remember which way I fed it, but either
way looks impossible at first look. If you have a good diagram from a factory
manual and purchase a harness from a reputable company, you should have no
problem. I've heard of people taking a lot of time drawing how wires were
connected to replicate connections, but I'd trust the drawings and get things
right rather than duplicate someone else's shortcuts. Take your time, double
check the diagram and go for it!
Pete
-----Original Message-----
From: David Moag [SMTP:moag@ix.netcom.com]
Sent: Monday, May 10, 1999 8:04 PM
To: DANMAS@aol.com; triumphs@autox.team.net
Subject: RE: 1974 Wiring Harness Installation
I'm going to be starting the same process on my TR3B in just a couple of
weeks (hopefully). Does anyone have any words of wisdom for the situation
where most of the old wiring harness was missing, and what was still there
was largely not connected? Unfortunately, that paints a fairly accurate
picture of what I'll be attempting.
Thanks,
Dave Moag
62 TR3B
77 Spitfire
> -----Original Message-----
> From: owner-triumphs@autox.team.net
> [mailto:owner-triumphs@autox.team.net]On Behalf Of DANMAS@aol.com
> Sent: Monday, May 10, 1999 12:44 PM
> To: rhansen@att.com; triumphs@autox.team.net
> Subject: Re: 1974 Wiring Harness Installation
>
> Red,
>
> Yes, you can do it! The key is to mark EVERY connection as
> you remove the
> old harness. You can't completely rely on the wiring
> diagrams, as there are
> often differences between them and reality. Also, make a
> diagram of the
> connections at each device, noting the location and any
> markings of every
> terminal. IOW, mark each terminal on your diagram with the
> number of wires
> and the color of each wire attached to it, and mark each wire
> with the device
> and terminal it came from. Make plenty of notes as to how the
> harness and the
> wires were routed before you remove them.
>
> Layout both your new harness and the old one on the floor and
> transfer the
> markings to the new one, leaving the markings on the old one
> for possible
> reference later. You may find some differences in the old
> versus the new
> that you can't account for, but we can help you there, if
> you've marked
> everything properly.
>
> When you do your marking and make your diagrams, don't leave
> out ANY wire or
> terminal, no matter how certain you are that you won't forget
> -- you WILL!
>
> Dan Masters,
> Alcoa, TN
>
> '71 TR6---------3000mile/year driver, fully restored
> '71 TR6---------undergoing full restoration and Ford 5.0 V8
> insertion - see:
> http://members.aol.com/danmas/
> '74 MGBGT---3000mile/year driver, original condition - slated
> for a V8 soon
> '68 MGBGT---organ donor for the '74
>
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