Results 1 to 7 of 7

Thread: Quick Overdrive Wiring Question

Discussions of Triumph motor cars

  1. #1
    Luke Skywalker Got_All_4's Avatar
    Join Date
    Dec 2004
    Location
    NEOHIO
    Posts
    1,583
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    1
    Thanked in
    1 Post

    Quick Overdrive Wiring Question

    I only have a wiring diagram for a TR4 for the overdrive wiring. What gauge are the wires coming off the ignition switch and AMP meter that go into the relay and on a TR3 does the brown wire get it's power from the amp meter? I have 16 gauge and started to wire mine and noticed that the OEM yellow purple wire is probably 10 gauge so I got concerned about my 16 gauge wire. Also how are the wires routed from the transmission to the relay? I also was planning to connect the white wire to the + side of the starter switch as the ignition switch terminal already has 3 wires in it. Any problem here? This is a A type.

    Thought I was going to wire up my overdrive tonight but went to get the relay out of the donor TR6 and there was none. They must have wired it directly through the switch. Anyway is there a aftermarket option? Thanks

  2. #2
    Member sagebrushbob's Avatar
    Join Date
    Oct 2013
    Location
    La Quinta, CA
    Posts
    28
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Re: Quick Overdrive Wiring Question

    I think you can see some of your answers in this photo:

    008.jpg
    Bob Teal
    TS41259LO

  3. #3
    Jedi Warrior 6TTR3A's Avatar
    Join Date
    Mar 2008
    Location
    San Diego, CA
    Posts
    432
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    4
    Thanked in
    4 Posts

    Re: Quick Overdrive Wiring Question

    Here's one that was labeled TR3 OD. There are others out there.
    This one doesn't address wire sizes, only colors.
    Also the white wire on this one could go to the ignition switch,
    and the brown w/white tracer could go to the amp meter.

  4. #4
    Freshman Member
    Join Date
    Mar 2016
    Location
    Ill.
    Posts
    3
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Re: Quick Overdrive Wiring Question


  5. #5
    Luke Skywalker Got_All_4's Avatar
    Join Date
    Dec 2004
    Location
    NEOHIO
    Posts
    1,583
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    1
    Thanked in
    1 Post

    Re: Quick Overdrive Wiring Question

    Ok good diagrams but does anyone know the size of the wire? Also do the wires get routed through the transmission tunnel. So would I have to drill a hole and insert a grommet or do they get routed around the back of the engine and through the fire wall?

    I am making my own harness to the relay and that is why I'm concerned about the size of the wires.

  6. #6
    Obi Wan M_Pied_Lourd's Avatar
    Join Date
    Oct 2008
    Location
    Newmarket, Ontario,Canada
    Posts
    2,434
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    10
    Thanked in
    10 Posts

    Re: Quick Overdrive Wiring Question

    You can see where I routed my wires on this video....

    https://youtu.be/Nmb41lITU_U

    Cheers
    Tush
    81 Alfa Romeo Spider Veloce, 81 Triumph TR8
    73 Triumph TR6 CF4874UO, 68 Triumph TR250 CD5228LO
    62 Triumph TR4 CT6716LO, 60 Triumph TR3A TS69891LO
    60 Triumph TR3A TS64870LO, 59 Triumph TR3A TS44836LO

  7. #7
    Jedi Warrior 6TTR3A's Avatar
    Join Date
    Mar 2008
    Location
    San Diego, CA
    Posts
    432
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    4
    Thanked in
    4 Posts

    Re: Quick Overdrive Wiring Question

    Sorry for the poor quality earlier. I'm trying again because I added an in-line fuse to the original schematic. The high load on the solenoid is only for a miilesecond but the pull-n coil has been known to stick which will fry the solenoid. The fuse doesn't prevent it from malfunctioning but will prevent the destruction of the solenoid. The size answer is: 16ga will be fine.
    Frank

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •