Johnyg Posted January 30, 2016 Report Share Posted January 30, 2016 I need to know how the wiring on a overdrive works changing from a standard 4 speed 3rail to a j type overdrive unit any one Link to comment Share on other sites More sharing options...
Clive Posted January 30, 2016 Report Share Posted January 30, 2016 Use the reverse light supply. From that to od inhibitor switch, then od switch (gear knob of column) and then to the solenoid. There shoudl be a fuse in teh reverse light circuit somewhere. Or, take a feed off the ignition circuit and to the inhibitor switch. J type does not require a relay. Link to comment Share on other sites More sharing options...
mishmosh Posted January 30, 2016 Report Share Posted January 30, 2016 yup its pretty easy, , I am sure someone must have a picture. Link to comment Share on other sites More sharing options...
rlubikey Posted January 31, 2016 Report Share Posted January 31, 2016 If you're having a gearlever-mounted switch, then wire from the inhibitor switch to the solenoid, and *then* to the gearlever switch and finally to chassis. It's not how Triumph did it, but a short in the gear lever won't release smoke from the wiring Just means you'll be in O/D in 3rd & 4th until you fix the problem. (Of course, a comprehensive fuse box can offer the same protection!) Richard Link to comment Share on other sites More sharing options...
Pete Lewis Posted January 31, 2016 Report Share Posted January 31, 2016 Up the stick best to use a silicon sleeved wire, takes the hest and resists the chafing pete Link to comment Share on other sites More sharing options...
Colin Lindsay Posted January 31, 2016 Report Share Posted January 31, 2016 Which car? Link to comment Share on other sites More sharing options...
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