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Technical dual engine start buttons

Discussion in 'Traditional Hot Rods' started by neilswheels, May 3, 2023.

  1. neilswheels
    Joined: Aug 26, 2006
    Posts: 1,338

    neilswheels
    Member
    from England

    Im fitting two engine start buttons or switches in my 40 seadan, one on the dash in the stock location, one on the firewall. Its a bit of an old school thing that allows you to start the engine from under the hood when you're 'tuning' it.

    Just wondered if anyone has some ideas about what to use. I bought a push button for it, but its not great, looking for an alternative.
     

    Attached Files:

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  2. Johnny Gee
    Joined: Dec 3, 2009
    Posts: 14,180

    Johnny Gee
    Member
    from Downey, Ca

    That’s the style button I’d use. What don’t you like about it? C82E5D42-26A0-404B-B528-575C8F9A2B4F.png
     
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  3. AccurateMike
    Joined: Sep 14, 2020
    Posts: 771

    AccurateMike
    Member

    I think of these
    bgb__945-1__3000001__.jpg
    bgb__945-2__3000001__.jpg
    Pull from the inside/push from under the hood.
    Mike
     
  4. jaw22w
    Joined: Mar 2, 2013
    Posts: 1,712

    jaw22w
    Member
    from Indiana

    That's a pretty nice setup. I see nothing wrong with that button. I like gauges in the firewall. Thinking about doing it myself and thought about a starter button. And maybe add a kill switch. Wiring for those would be pretty straight forward. But then I got to wondering if it might be possible to wire a whole 'nother ignition switch somehow wired like a 3-way light switch in the house. I am not electrician enough to even start to figure that out. Would it be possible?
     
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  5. Jokester
    Joined: Jan 29, 2005
    Posts: 787

    Jokester
    Member

    Be sure you use a neutral safety switch so you don't drive over yourself.

    .bjb
     
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  6. rattlecanrods
    Joined: Apr 24, 2005
    Posts: 524

    rattlecanrods
    ALLIANCE MEMBER

    Agreed on the kill switch as well.
    I'm actually a fan of pull type starter switches. It feels more intentional or maybe its cause I grew up flying and old tractors. Just a thought. Screenshot_20230503_181847_Brave.jpg
     
  7. Jmountainjr
    Joined: Dec 29, 2006
    Posts: 1,878

    Jmountainjr
    ALLIANCE MEMBER

    For under the hood I would use either a push button or toggle switch that have the rubber covering to keep out moisture and dirt.
     
  8. 52HardTop
    Joined: Jun 21, 2007
    Posts: 1,110

    52HardTop
    Member

    Sure, just wire the two switches in parallel. Either switch will start the engine. They are normally open contacts with a momentary contact. They need to be held closed until the engine starts.
     
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  9. I’ve found some ignition wiring that was getting back fed. Couldn’t shut them off. 2 ignition switches might be a problem but 2 starter buttons wouldn’t be. If there’s a starter under the hood for tuning there should be a kill switch for tuning.
     
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  10. Joe Blow
    Joined: Oct 29, 2016
    Posts: 1,757

    Joe Blow
    ALLIANCE MEMBER

    Looking for an alternative for looks or function? Always liked these....you can find them with black or chrome button. Made as repops too but not the same look as vintage.
    s-l1600 (3).jpg s-l500 (1).jpg
     
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  11. jaw22w
    Joined: Mar 2, 2013
    Posts: 1,712

    jaw22w
    Member
    from Indiana

    OK! I probably got this all wrong, but let me try. So, I wire from the 12v input of my current ign switch to the input of the 2nd ign switch , then wire from the 2nd switch to the solenoid for start and run a wire from the switch to the coil for ignition. Correct? What if I left the firewall switch on and started the car from the dash? or vice versa? It wouldn't burn anything down?
     
  12. Budget36
    Joined: Nov 29, 2014
    Posts: 15,177

    Budget36
    Member

    If you have to turn one switch on to activate the other switch, that would be a series circuit. If 12 volts were run to each switch and no connection from one to he other, that would be parallel.
    Now you could do parallel from one switch to he other by going from the hot (non switched side) of the switch to the other hot (non switches side). Both switched sides would then go to the start circuit.
     
  13. Budget36
    Joined: Nov 29, 2014
    Posts: 15,177

    Budget36
    Member

  14. Kerrynzl
    Joined: Jun 20, 2010
    Posts: 3,586

    Kerrynzl
    Member


    @neilswheels
    You connect from the accessory side of the fuse box to get the 12v feed to a momentary button, then splice to the starter wire at the ignition switch especially if it is Automatic [or direct to the starter solenoid]
    The momentary button is dead with the Ign switched off
    Switch the Ignition to Acc and you can "bump" the engine over without the engine starting.
    Switch the ignition to On and you can start it.

    I've also used rotary LPG/CNG dual fuel switches on my race cars. Rotate them for On/Off and Push them to Crank.
    This comes in handy on the "Rare" :D occasions when I am working under the hood and don't want to leave the ignition switched on [saving the points]
     
    Last edited: May 3, 2023
  15. lostone
    Joined: Oct 13, 2013
    Posts: 3,517

    lostone
    Member
    from kansas

    If I understand correctly you will need 2 switches with what your trying to use IF you actually want to start the motor and just not turn it over.

    You will need the push button momentary switch to energize the starter to turn the motor over and a flip or on-off switch for the ignition.

    The momentary switch will do nothing but engage the starter and turn the motor over, without a second switch to energize the ignition it won't start. Once it is started and running you will also need the secondary switch to kill the ignition power to stop the motor.

    My understanding was the under hood push button was used to bump the motor over in order to adjust valves on solid lifter cams and to adjust points....

    .
     
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  16. AccurateMike
    Joined: Sep 14, 2020
    Posts: 771

    AccurateMike
    Member

    Shipping is only a little rough.
    https://www.smallfordspares.co.uk/search?query=starter+switch&vehicle=
    My Morris Minor uses the same switch. There is probably someone selling it for them, or for various Austins, over here. Check the Lucas ST19/2 number on the Google. Mike

    Edit: BTW my car will turn over without the key. You use that to turn on the ignition. The switch is between the battery and starter. Easy to hotwire is an understatement.
     
  17. Atwater Mike
    Joined: May 31, 2002
    Posts: 11,618

    Atwater Mike
    Member

    Let's not forget the PURPLE WIRE from starter solenoid to bypass resistor to start.
    Ignition key 'off', crank the starter and energise the ign. bypass and 'Vroom!... Just momentary, but will start (and run) as long as starter is engaged.
    Careful out there...
     
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  18. dirt t
    Joined: Mar 20, 2007
    Posts: 5,384

    dirt t
    Member

    First make sure it's in neutral and park brake is
    Set
     
    Last edited: May 3, 2023
    Kerrynzl likes this.
  19. I like stock Ford, but IF you need a 2 pole switch then try a Cole Hersee 9011
    cole hersee.jpg


    If you want to wire a stock Ford switch that's a ground you can run a relay. Both starter switches would work the ground side of the relay coil.
     
    Last edited: May 3, 2023
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  20. 302GMC
    Joined: Dec 15, 2005
    Posts: 8,441

    302GMC
    Member
    from Idaho

    I'd find a Ford solenoid with the pushbutton built into it ....
     
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  21. I have one of those solenoids with the push button built in. It works great as long as you make sure the vehicle is not in gear.
     
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  22. GTS225
    Joined: Jul 2, 2006
    Posts: 1,293

    GTS225
    Member

    That would be my biggest concern. The OP could easily get ahead of himself (mentally), and hit that underhood switch before ensuring neutral trans status.
    There's room for a disaster in the making here, and needs some precautions engineered into it..........I've gotten ahead of myself on stuff.

    Roger
     
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  23. alanp561
    Joined: Oct 1, 2017
    Posts: 5,460

    alanp561
    ALLIANCE MEMBER

    Google "marine push button switch". West Marine has these.

    [​IMG]
     
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  24. chopolds
    Joined: Oct 22, 2001
    Posts: 6,322

    chopolds
    Member
    from howell, nj

    I used one of those Cole Hersee ones on my 57. Made it easier to bump the engine over when adjusting the solid roller lifters.
     
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  25. jaw22w
    Joined: Mar 2, 2013
    Posts: 1,712

    jaw22w
    Member
    from Indiana

    What if you ran the switch through the neutral safety switch?
     
    Atwater Mike likes this.
  26. LOL.
    Obvious you folks were not truck drivers, especially old Detroit Engine ones. NEVER LEAVE IT IN GEAR. I learned early on. I NEVER park my Buick in gear. Never. Parking brake applied always when parked.
    Technically correct though. Better safe than ---.

    Personally I just use a jumper wire under the hood. And a clip on [jumper] push button switch. But then I learned under a shade tree!

    Ben
     
  27. 1971BB427
    Joined: Mar 6, 2010
    Posts: 9,769

    1971BB427
    Member
    from Oregon

    I use a weatherproof automotive PB switch. It's mounted through the firewall and the black rubber boot not only protects it from the elements, but helps blend in on my black firewall. I love having a permanent start or cranking switch. $7 on Amazon.

    [​IMG]
    https://www.amazon.com/AUTOPARTS-En...hvlocphy=&hvtargid=pla-4583726553905390&psc=1

    As for the concerns about cranking in gear. I hope guys working on their cars using a remote start button that temporarily clips to the solenoid wouldn't start their car in gear? Having one permanently connected shouldn't make it more dangerous. Unless you have problems with your memory either way?
     
  28. 302GMC
    Joined: Dec 15, 2005
    Posts: 8,441

    302GMC
    Member
    from Idaho

    Or mechanics ... The first day I worked for him, the owner of the shop I'd waited half my life to work in taught me to never leave any vehicle in any gear, ever.
     
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  29. I guess I am just too old fashioned for the forum. o_O:D:rolleyes: I still use a remote starter switch, just like a real mechanic. It is a momentary switch with 2 wires and to alligator clips. You clip the wires onto the starter solenoid, then you hold the switch in your hand and push the button to roll the motor over.

    No extra wiring and if I have someone else's car to tune I am set even if they are not. When I am done I throw it in my tool box or tool bag if I am traveling.
     
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