wiring problem

Unknown
Unknown
edited November -1 in HUDSON
:confused:I'm having a wiring problem on my 49. It has a 308 with 3 speed overdrive. While rewiring I found a switch on the side of the trans. that isn't hooked to anything. When lever is in reverse the only terminal goes to ground. Sort of like a dome light would work. I was wondering if this is for backup lights or what ever. I was very disappointed in the 49 reproduction manual that doesn't show the 6 pole solenoid wiring diagram. I had to get info from one of my old Motor manuals. None of the manuals show this switch or my brain and reading skills are slipping.

Comments

  • Geoff
    Geoff Senior Contributor
    My guess is it is for installation of a reversing light.

    Geoff
  • hudsontech
    hudsontech Senior Contributor
    I got a 1948-1949 overdrive schematic from a Motor's auto wiring diagram I can scan and send you. It shows a six pole something or other down in one corner.



    Drop me an email @ NEChudsontech09@yahoo.com (drop the NEC) and I'll send it along.



    Hudsonly,

    Alex Burr

    Memphis, TN

    http://hetclub.org/burr
  • SuperDave
    SuperDave Senior Contributor
    If the switch is on the back of the transmission, It is the reverse lockout switch. And yes it provides a ground for the relay, and removes the ground when the tranny is in reverse, so the car can back up. If it is on the side of the transmission, It is for DriveMaster or Vacuum Clutch and is not needed for the OD circuit..unless you have one of those options..
  • Unknown
    Unknown
    Thanks guys,

    I have the old motors manual and that is where I finally found the wiring for the 6 pole relay switch, but I really appreciate the offer.



    What I have is a ground switch on the passenger side rear of transmission, it runs to another switch on the driver side rear, then the shifting solenoid. there are 4 wires coming from these in a harness to the 6 pole switch with one going through the kick down switch.



    What stumped my wiring project was the one terminal switch to ground found about center of the transmission on the driver side and it looked as if it was never used. My thought was if Dave is right, to go ahead and run a fifth wire down in harness and use it for back up lights.



    In looking in old manuals the back up lights were a dealer option and wired to a on and off switch in the car. I think a relay or wired like a dome light would be a cleaner install.



    What's your thoughts?

    Thanks,

    Glen
  • Park_W
    Park_W Senior Contributor
    Glen, if it only grounds when you're in reverse, sounds like a winner for backup lights, but the manual says it's grounded in all gears except third. Check it out in the other gears. Its original purpose was related to the vacuum clutch that was part of the Drivemaster and Vacumotive Drive systems. It permitted the automatic clutch to disengage when you let up on the gas in 1st, 2nd and reverse, but not in 3rd. Obviously you wouldn't want the clutch to release every time you let up on the gas when in high gear.
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