One relay direct power to HL

Discussion in 'Tech Discussion' started by 73c20jim, Sep 14, 2018 at 7:26 PM.

  1. 73c20jim

    73c20jim Supporting Member Supporting Member

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    Jim
    Truck Year:
    1973
    Truck Model:
    C20 2WD Custom Deluxe
    Engine Size:
    350 CID 195/260 HP Goodwrench crate
    Logic

    IF HL ON
    THEN POWER TO FOOT SWITCH
    IF POWER TO FOOT SWITCH
    THEN ACTIVATE RELAY1
    IF RELAY1 ACTIVE
    THEN POWER TO HI BEAM
    ELSE POWER TO LO BEAM​


    Foot switch is not powered unless headlights are on. AS IS Now. FS is SPDT with no off position.. Current plug will be disconnected. One lead will now go to activate relay1, the other position will be null, in essence making it an SPST on/off switch.


    Relay1 is SPDT with no off position. In an inactivated position it supplies power to LO BEAM. When switched on, supplies power to HI BEAM.

    Comments???

    DRL, HL Buzzer, seatbelt buzzer, idiot light, and security starter disable circuits to follow. If logic on this one seems sound I will provide wiring diagram.

    AGAIN. Comments, please.
     
    Last edited: Sep 14, 2018 at 7:54 PM
  2. yevgenievich

    yevgenievich Full Access Member

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    Relay just switches single power supply between two contacts. In off position one of contacts gets power, and in on position switches to second contact getting power. So if you use the hole set up as driving lights type the headlight switch just activates high beam.

    Or I am not following you correctly
     
  3. 73c20jim

    73c20jim Supporting Member Supporting Member

    Age:
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    C20 2WD Custom Deluxe
    Engine Size:
    350 CID 195/260 HP Goodwrench crate
    Found different flaw in my logic. Can't be done the way I suggested.

    I'll try again.
     

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