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TR2/3/3A Switches on the top of an Overdrive

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71TR6

71TR6

Jedi Hopeful
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Hello All- I’m wiring up a TR4 overdrive unit that I installed into my TR3A and notice there are three switches on the top of the case. I think I’ve correctly wired up the lockout switches (confirm, please?) but I have no idea what the third switch is for. Does anyone have any idea what this does? Secondly, where should the OD harness ground ring attach?
IMG_3115.jpeg
 
71TR6 said:
Hello All- I’m wiring up a TR4 overdrive unit that I installed into my TR3A and notice there are three switches on the top of the case. I think I’ve correctly wired up the lockout switches (confirm, please?) but I have no idea what the third switch is for. Does anyone have any idea what this does? Secondly, where should the OD harness ground ring attach?View attachment 98330View attachment 98330
Click to expand...

71TR6 said:
Hello All- I’m wiring up a TR4 overdrive unit that I installed into my TR3A and notice there are three switches on the top of the case. I think I’ve correctly wired up the lockout switches (confirm, please?) but I have no idea what the third switch is for. Does anyone have any idea what this does? Secondly, where should the OD harness ground ring attach?View attachment 98332
Click to expand...
I believe the 2 switches are correct. The 3rd switch is for a reverse light. . The ground is easily attached under any of the bolts holding the top cover onto the tranny.
Charley
 
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