MSD 8973 Shift Light Wire

Discussion in 'PSI Superchargers Tech Questions' started by Flyboy68, Dec 8, 2011.

  1. Flyboy68

    Flyboy68 Member

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    Anyone ever used the Orange/Yellow shift light output wire for ground on a hi-speed solenoid? ie, to where the solenoid is on after a certain rpm? I'm already using the other rmp/time wire...need another one.

    Josh
     
    #1
    Flyboy68, Dec 8, 2011
  2. caseyspradlin

    caseyspradlin Member

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    shift light

    i believe the wire is only active when the rpm of motor is at set rpm of shift light. therefore only power on the wire for an instant, then back off again.
     
    #2
    caseyspradlin, Dec 8, 2011
  3. Flyboy68

    Flyboy68 Member

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    The 8973 manual says that wire will provide 5 amps continuous ground when enabled. If you have your shift light set at say 6000, your light will stay on until you shift below that point...correct? Hence the ground would be enabled above this point.
     
    #3
    Flyboy68, Dec 9, 2011
  4. PROMOD63

    PROMOD63 Member

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    tried to use mine on a high speed and it didnt have enough amps
     
    #4
    PROMOD63, Dec 9, 2011
  5. Mike Canter

    Mike Canter Top Dragster
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    It has to go through a relay. You cannot pull big current flow through the 8973 or the Power Grid.
     
    #5
    Mike Canter, Dec 9, 2011
  6. Flyboy68

    Flyboy68 Member

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    so you couldn't use that wire for ground on a nitrous fuel solenoid?
     
    #6
    Flyboy68, Dec 9, 2011
  7. Mike Canter

    Mike Canter Top Dragster
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    Only through a relay.
     
    #7
    Mike Canter, Dec 9, 2011

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