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Converting this '73 from a TH400 to a 4-Speed Transmission has it challenges.
In the car's Starter Circuit, I believe this diagram shows that the two wire contacts must be closed in order for the Starter Solenoid to be energized. Correct?
I elected to leave out this Safety Switch, meaning if I want the car to start, I must close the contacts of these wires. Correct?
While working underneath the Dash with the new Pedal Installation, I've seen the pigtail/connector of the purple and purple/white wires dangling there in the Pedal area.
I've read where some folks who also opted on sans switch made an anti-theft switch circuit from this pigtail connector. The wires look to be at least 14 Gauge size.
So I am wondering What Switch size and type did you folks use, as well as Where a good location of the switch be.
The solenoid should draw around 10A or less, maybe a spike of double that or so (say 25A) for a very very brief moment when it's activating but the switch you're adding isn't "switching" during that time it's either on or off already so a 15A rated switch should be lots.
Where to put it? couldn't tell you but hiding in plain site is typically a good thing
M
The neutral safety switch for manual transmissions is located on the clutch assembly. On automatics it is located by the shifter in the center console.
If you tie the ends of the wires together you cab eliminate the safety switch- which isn't necessarily a good thing to do , especially if other people drive it and don't know
I would not recommend deleting the neutral safety switch. It is there for a reason. On my swap I installed the switch on the clutch pedal. The Tremec comes with a built in neutral safety switch as well. I wired mine so that the car will start with either the trans in neutral or the clutch depressed.
Thanks folks.
Yes, and interesting how they are wired: Two pigtails, one up in the console area for the Auto and one in the Clutch Pedal area. Interesting wiring config because one pigtail is always disconected/open, yet circuit closes and Starter Solenoid works when the other pigtail's switch is activated. Parallel wiring, right?
I agree that risk of damage/injury IS increased by leaving the original switch out. Only I will be driving it, and it's just 1st hand nature in me to wigglethe Shifter in Neutral and engage the Clutch before Starter ON, just like in my other two stick-shift vehicles.
Now that I know the amperage involved here, I'm thinking of placing it in the lockable Center Cargo Compartment. Definitely not in plain sight, but not planning on parking in strange areas either, so switching to OFF will be rare.
Thanks again.
Steve
If you cut off the 2 (about 6" long) automatic transmission neutral safety wires (yellow & purple) flush with the auto shifter, you can use them to fab a pigtail that you attach to the pedal mounted switch. Just add 2 female spade terminals to the 2 cut ends and attack those to the pedal switch. Leave the black harness plug end alone because you will need it in a minute. Dont stress over cutting the shifter wires - you won't be using them again anyway.
Unwrap the console harness about 18 inches (from shifter forward) and pull out the 2 neutral safety wires then re-wrap the harness. Leave the black terminals on the purple/purple white wires alone.
Now you have all the wiring ready to just plug back together. Same as factory manual transmission cars.
If you cut off the 2 (about 6" long) automatic transmission neutral safety wires (yellow & purple) flush with the auto shifter, you can use them to fab a pigtail that you attach to the pedal mounted switch. Just add 2 female spade terminals to the 2 cut ends and attack those to the pedal switch. Leave the black harness plug end alone because you will need it in a minute. Dont stress over cutting the shifter wires - you won't be using them again anyway.
Unwrap the console harness about 18 inches (from shifter forward) and pull out the 2 neutral safety wires then re-wrap the harness. Leave the black terminals on the purple/purple white wires alone.
Now you have all the wiring ready to just plug back together. Same as factory manual transmission cars.
So that's a momentary contact switch that you have to depress to start the car?
Negative DrWet. She's a Push ON/Push OFF.
I remember, when I had the TH400 in the car, coming to and going thru an intersection, and the engine died for some reason. Restarting the engine was impossible until I selected Neutral. I wasn't used to that, so I didn't like it. Therefore, no way would I install a Momentary ON switch for this application. This switch toggles to either ON or OFF.
Only I drive it. I never start any of my 2 other vehicles without the clutch pedal depressed and their trannys in Neutral. A habit.
I'll be careful.
M20 Neutral Safety Switch Ideas
Therefore, no way would I install a Momentary ON switch for this application. This switch toggles to either ON or OFF.
