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Thread: TR8 Starter wiring help needed

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    Luke Skywalker
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    Question TR8 Starter wiring help needed

    I wrestled the original OEM TR8 starter out of my '80 TR8 project and have a Rover-spec replacement (like BP Northwest has listed at https://www.bpnorthwest.com/triumph/...ver-v-164.html.) The original starter has a unique setup for connections: battery connection post, another large terminal post, plus two wires that screw in together on another connection and then a lone small wire that screws into the other side.

    So the question is: how do I wire this all to a new starter and solenoid that has the same two large posts on the solenoid plus one spade connector post?

    Any ideas would be great, because I can't find a single place on the web that indicates how to wire all these individual wires to the starter/solenoid.
    Sam B.
    Automotive Journalist at www.apexstrategy.com
    '80 TR8, '74 TR6, plus '86 Ferrari 328 GTS,'76 Ferrari Dino 308 GT4,'02 Corvette Conv, '86 Dodge 600ES Turbo Conv.

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    Re: TR8 Starter wiring help needed

    Hi, Sam -

    When I had my TR8, I replaced the starter as you are. I remember a difference in wiring, but not sure at this time what that was. Will see if I have any notes on it and get back to you if my memory jogs.

    I do remember replacing the mounting bolts with allen head bolts. Makes removing and replacing MUCH easier the next time!


    Mickey
    "There are three kinds of men. One who learns by readin'. The few who learn by observation. The rest of them have to pee on that electric fence for themselves." Will Rogers
    Mickey Richaud - '73 MGB, '69 MGB GT/V6 (both SOLD! ); Victor TF 1800; '03 Jaguar XK8
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    Yoda
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    Re: TR8 Starter wiring help needed

    I addition to this forum you may wish to subscribe to the TR8 mailing list. Super helpful and very experienced people there too...

    What does the wiring diagram say?

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    Re: TR8 Starter wiring help needed

    Ballast resistor bypass circuit.jpgI used this diagram to wire a relay into my TR8's high torque starter circuit. Hope this helps.
    73 GT6 Convertible
    74 Jensen Healey

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    Luke Skywalker
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    Re: TR8 Starter wiring help needed

    Quote Originally Posted by tdskip View Post
    What does the wiring diagram say?
    The wiring diagram just shows the battery cable going to the solenoid combined with the brown (alternator wire), and then a white/red (to the starter relay) to another terminal on the solenoid and a white/yellow (ballast resistor) to a third terminal on the solenoid.

    An updated one online shows no white/red, but rather two white/orange together on a single terminal: one going to the starter relay (meeting up with white/red) and the other going to the oil pressure switch.
    Last edited by sammyb; 08-28-2016 at 04:21 PM.
    Sam B.
    Automotive Journalist at www.apexstrategy.com
    '80 TR8, '74 TR6, plus '86 Ferrari 328 GTS,'76 Ferrari Dino 308 GT4,'02 Corvette Conv, '86 Dodge 600ES Turbo Conv.

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    Luke Skywalker
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    Re: TR8 Starter wiring help needed

    Here's what the solenoid looks like on the one I took out: https://www.urqualitysolutions.com/N...0-SSLU-860.htm
    Sam B.
    Automotive Journalist at www.apexstrategy.com
    '80 TR8, '74 TR6, plus '86 Ferrari 328 GTS,'76 Ferrari Dino 308 GT4,'02 Corvette Conv, '86 Dodge 600ES Turbo Conv.

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    Re: TR8 Starter wiring help needed

    Don
    "Stick a Wedge in it!"
    Mount Pleasant,SC

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    Luke Skywalker
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    Re: TR8 Starter wiring help needed

    Don,
    The wiring diagram on the bottom of your post is not correct for a 1980 Carb TR8. The photo in the middle looks stock, as it appears the alternator and battery are on one pole, the (actually on my car) black/orange together on a single screw in terminal and the brown to the ballast resistor up top.

    I think the issue will be that I either need to have a four pole or need to put in a relay for 12V bypass of the ballast resistor. I might just clean and reuse my current solenoid.
    Sam B.
    Automotive Journalist at www.apexstrategy.com
    '80 TR8, '74 TR6, plus '86 Ferrari 328 GTS,'76 Ferrari Dino 308 GT4,'02 Corvette Conv, '86 Dodge 600ES Turbo Conv.

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    Re: TR8 Starter wiring help needed

    Man, I wish I could remember what I did to hook it up. I do remember the difference involved the white/orange (or white/red - conflicting info there) wire, but can't remember whether it was simply omitted or spliced elsewhere. Contact Woody at the Wedge Shop; I'm sure he can help.

    Let us know!

    Mickey
    "There are three kinds of men. One who learns by readin'. The few who learn by observation. The rest of them have to pee on that electric fence for themselves." Will Rogers
    Mickey Richaud - '73 MGB, '69 MGB GT/V6 (both SOLD! ); Victor TF 1800; '03 Jaguar XK8
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    Re: TR8 Starter wiring help needed

    I thought the 3 wire oil switch was for a carb car. OOPS, wrong pick
    This is stock
    Attachment 44377
    This is I think Woody's
    Attachment 44378
    EFI wiring
    Attachment 44379
    Don
    "Stick a Wedge in it!"
    Mount Pleasant,SC

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    Re: TR8 Starter wiring help needed

    Call Woody or Ted, don't think the extra wire is needed can't remember which is which

    I know I have a pic of the new starter wired but can't find it ...sorry Sammy
    Don
    "Stick a Wedge in it!"
    Mount Pleasant,SC

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    Moderator Mickey Richaud's Avatar
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    Re: TR8 Starter wiring help needed

    Quote Originally Posted by DNK View Post
    Call Woody or Ted, don't think the extra wire is needed can't remember which is which

    I know I have a pic of the new starter wired but can't find it ...sorry Sammy
    Yeah, that's the issue. What to do with the white/yellow wire. It's connected to the ballast resistor, and if I recall, it's not necessary in some instances (carburetor vs. fuel injection, and depending on the distributor used); and my less-than-perfect memory tells me it's not used. The white/orange wire is the one that energizes the starter. But again, my recall isn't to be trusted here! Anyway, Woody can definitely shed some light.
    "There are three kinds of men. One who learns by readin'. The few who learn by observation. The rest of them have to pee on that electric fence for themselves." Will Rogers
    Mickey Richaud - '73 MGB, '69 MGB GT/V6 (both SOLD! ); Victor TF 1800; '03 Jaguar XK8
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    Re: TR8 Starter wiring help needed

    Trying to get the poster of this to chime in

    Attachment 44380
    Here is how mine is wired, had to add a lug to the side that is energized when the starter is engaged for the wire to the ballast resistor.
    Don
    "Stick a Wedge in it!"
    Mount Pleasant,SC

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    Re: TR8 Starter wiring help needed

    So that is my picture that Don posted. Here is one with the wire to the ballast resistor labeled. I had to add a connection for that wire, I took a ring terminal and a male spade terminal, connected them, and installed the ring terminal under the connection that comes active when the starter is energized. The reason for that connection is that it provides full power to the coil during startup. Hope this helps!
    Attached Images Attached Images
    Darrell Walker
    66 TR4A IRS-SC CTC67956L
    81 TR8 SATPZ458XBA406206 (daily driver)
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    Re: TR8 Starter wiring help needed

    Ain't Mr Walker a peach?
    Don
    "Stick a Wedge in it!"
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    Luke Skywalker
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    Re: TR8 Starter wiring help needed

    I used this diagram to wire a relay into my TR8's high torque starter circuit. Hope this helps.
    Rick -- was that relay a special one, or just a generic 12V?
    Sam B.
    Automotive Journalist at www.apexstrategy.com
    '80 TR8, '74 TR6, plus '86 Ferrari 328 GTS,'76 Ferrari Dino 308 GT4,'02 Corvette Conv, '86 Dodge 600ES Turbo Conv.

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    Re: TR8 Starter wiring help needed

    Generic
    73 GT6 Convertible
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    Luke Skywalker
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    Re: TR8 Starter wiring help needed

    So I emailed with Woody, and he solved it for me:

    - Battery cable and wire to alternator on the big lug.
    - Wires to starter relay and oil switch on the big press-on spade
    - leave wire to ballast resistor off, as Woody states that since the new starters take less voltage, the TR8 will start just fine without the full 12V through the ballast resistor

    I installed the starter today, but since my "new" ignition switch is faulty (jammed up), and my carbs are off for cleaning, I haven't tried it yet.
    Sam B.
    Automotive Journalist at www.apexstrategy.com
    '80 TR8, '74 TR6, plus '86 Ferrari 328 GTS,'76 Ferrari Dino 308 GT4,'02 Corvette Conv, '86 Dodge 600ES Turbo Conv.

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    Moderator Mickey Richaud's Avatar
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    Re: TR8 Starter wiring help needed

    Glad that part's sorted!
    "There are three kinds of men. One who learns by readin'. The few who learn by observation. The rest of them have to pee on that electric fence for themselves." Will Rogers
    Mickey Richaud - '73 MGB, '69 MGB GT/V6 (both SOLD! ); Victor TF 1800; '03 Jaguar XK8
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