Voltage regulator

Nevada Hudson
Nevada Hudson Senior Contributor
edited November -1 in HUDSON
In all the cross-references on voltage regulators, it says that a '50 Commodore 6 Takes a VR25 voltage regulator, which I already have. The conectors are; ARM, Field, and BATT. Looks like the '50 should have one more connection on the regulator. Is this the right regulator for this vehicle? When you turn the ignition off, the generator light stays on. When the vehicle is running, the generator light goes off. What gives?

Comments

  • [Deleted User]
    [Deleted User]
    Did you polarize the new regulator when you installed it?
  • [Deleted User]
    [Deleted User]
    Nevada Hudson wrote:
    In all the cross-references on voltage regulators, it says that a '50 Commodore 6 Takes a VR25 voltage regulator, which I already have. The conectors are; ARM, Field, and BATT. Looks like the '50 should have one more connection on the regulator. Is this the right regulator for this vehicle? When you turn the ignition off, the generator light stays on. When the vehicle is running, the generator light goes off. What gives?

    Ray, The year 1950 was a bit confusing for the voltage regulator in Hudsons . Some of the early cars had the old model Auto Lite voltage regulator from 1941 still in them, {VRR- 4001A} used up to the 49 model year. However the majority of cars had the newer model regulator installed {VRP-6002A}. This indeed had four connecting lugs. the standard Battery, Field and Armature also had a "T" lug that was across from the 'Bat' lug. This "T" lug was wired into the generator signal light on the dash. Hopes this helps.
  • Nevada Hudson
    Nevada Hudson Senior Contributor
    Thanks Lance, Thats what I thought ! An extra lug! I noticed that my old motor manuals list the VRP6002A. Now, who carries this regulator ? All I can find is the VR25, and the cross references list the VR25. Even the Louis Backhus swaps manual lists the VR25. Maybe Napa or someone else has a different number. You find out neat things when you rewire a vehicle !
  • [Deleted User]
    [Deleted User]
    Ray, The Hollander lists the only other Hudson voltage regulator for your 1950 that will work is from the 51 model year. No doubt because its a 35 amp regulator. In 52 the amperage was increased to 45 . just add on another lug to where you need one and you should be OK. The Auto Lite number for that regulator for 51 was VRP 6101 A . There was also another model for 51: VRP 4004F.Hollander also lists a bunch of other Auto Lite regulators to interchange from other makes but only the 51 model for Hudson.
  • Park_W
    Park_W Senior Contributor
    You don't really need the fourth VR terminal ... just connect the wire for the GEN light to the ARM terminal. Most non-Hudsons (and the later Hudsons) were wired this way. And if the under-dash area has been rewired, be sure that the other (the "hot feed") wire for the GEN light is coming from the ignition switch, but not from the ignition switch terminal that feeds the coil (i.e., you want the "other than ignition" terminal on the switch).
  • Geoff
    Geoff Senior Contributor
    Park is right. The fourth terminal is connected to a set of points on the cut-out coil, which are normally closed, with one side connected to ground. When you turn the ignition on, the Generator light is connected to ground, hence will light up. As the generator starts charging the cut-out closes, and opens the points, and the light goes out. On all other regulators the generator light is connected to the "A" terminal, and the light grounds through the armature. As the generator starts charging, the voltage builds up, and the light gradually goes out, as the "earth" side is now the same potential as the "Ignition" side. So you can use the later regulator, just re-set the maximum current level to 35 amps. Here endeth the lesson!

    Geoff.
  • Park_W
    Park_W Senior Contributor
    Geoff, thee doth sound like an old ... er, that is, long time Anglican!
  • Nevada Hudson
    Nevada Hudson Senior Contributor
    Thanks for the wonderful advice gents ! Cheers!
  • thekid1950
    thekid1950 Member
    Geoff

    your old post has helped me but I might still have a problem.

    I hooked the GEN light wire to the A terminal on the regulator.

    When I rev the engine the GEN light dims but doesn't go completely out.

    What gives?
  • Geoff
    Geoff Senior Contributor
    Obviously the generator is not charging. You need to check the voltage with an analog meter. When the motor is stopped the light is earthign through the armature commutator. when the generator starts charging the voltage equalises between the armature and the bulb, hence there is no voltage drop across the bulb. If it is glowing it indicates that there is voltage drop across the filament. When the generator is charging the armature terminal should equal the battery voltage. You may need to polarise the generator by momentarily connecting between A and B terminals. Try that and see how you get on. Then if the light goes out, check that the A terminal is showing 7.25 volts with the engine revving and the headlights on. If it doesn't work, check the condition of the brushes. Good luck,

    Geoff.
This discussion has been closed.

Categories

In this Discussion