Register now to get rid of these ads!

51 mercury push button start problem please help

Discussion in 'The Hokey Ass Message Board' started by oo7jbondistm, Nov 16, 2010.

  1. oo7jbondistm
    Joined: Sep 14, 2010
    Posts: 37

    oo7jbondistm
    Member
    from Upstate NY

    I have a two wire push button starter on my car and it has a painless wiring harness in it the car has also been converted to 12v.
    One wire goes to starter solenoid the other goes to the two position key switch.
    When the dash is not attached to the car but laying on the seat turn the key push the button the car starts. When I put the dash Back up in its proper position and turn the key the wire smokes and burns itself up

    Please help
     
  2. carkiller
    Joined: Jun 12, 2002
    Posts: 849

    carkiller
    Member

    Your car was originaly a positive ground. Now when you push the button your creating a dead short, isolate the button so it dosent short out or instal a more modern switch that has the starter cycle.
     
  3. oo7jbondistm
    Joined: Sep 14, 2010
    Posts: 37

    oo7jbondistm
    Member
    from Upstate NY

    I dont even get to the point of pushing the button i just turn the key and the wire from the key switch to the push button smokes then burns up.
    The push button start is a chrome one from advanced auto parts, picked it up about a month or two ago
     
  4. Da Tinman
    Joined: Dec 29, 2005
    Posts: 4,222

    Da Tinman
    Member

    the button may be bad, when the dash is not installed it has no way of grounding, once install the short in the switch has a place to go.
     
  5. oo7jbondistm
    Joined: Sep 14, 2010
    Posts: 37

    oo7jbondistm
    Member
    from Upstate NY

    Didnt think about that any recommendations on buttons that will fit without having to grind the hole in the dash out
     
  6. Da Tinman
    Joined: Dec 29, 2005
    Posts: 4,222

    Da Tinman
    Member

    get another of the same switch and try that first.
     
  7. oo7jbondistm
    Joined: Sep 14, 2010
    Posts: 37

    oo7jbondistm
    Member
    from Upstate NY

    Fair enough ill give that a shot
     
  8. UnIOnViLLEHauNT
    Joined: Jun 22, 2004
    Posts: 4,826

    UnIOnViLLEHauNT
    Member

    Yo! I may be reading this wrong but I think you have a bigger problem.

    If you are trying to use a stock button that completes the GROUND side, not the hot side like a traditional SBF relay does. You NEED to replace the relay and get your wiring right. You are sending a ton of amperage directly to ground, that is your problem.
     
  9. junk yard kid
    Joined: Nov 11, 2007
    Posts: 2,717

    junk yard kid
    Member

    is it the old keyed switch?
     
  10. Mike51Merc
    Joined: Dec 5, 2008
    Posts: 3,855

    Mike51Merc
    Member

    I agree that the solenoid needs to be changed. The 6V (pos gnd) unit is triggered by grounding, the new 12 V (neg gnd) unit is triggered by bringing the hot lead to it.

    The old starter push button (a single terminal switch to ground) worked by grounding the solenoid trigger wire. If you want a push button, you need a new switch that will take a hot lead on one terminal and a wire to the new solenoid on the other terminal.
     

Share This Page

Register now to get rid of these ads!

Archive

Copyright © 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Terms of Service. Privacy Policy.

Atomic Industry
Forum software by XenForo™ ©2010-2014 XenForo Ltd.