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Canadian car identification here: Serial Numbers 1935-1964 | 1965-1966
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Thread: Part number identification help

  1. #1
    Ed Raner Guest

    Post

    I ran across a box of electrical motors that I must have purchased some time ago. They appear to be headlight motors and or window motors If anyone could help me indentify these, I'd be greatful.

    #5045412 Date code 2-66 B; I believe that the rods that are in the box go with this motor, one rod has the numbers 15 and 27 stamped on the ends and the slots are 180 degrees from each other; the other rod is stamped 15 and 21 and the slots are at 90 degress to each other.

    #5045587 with 3 0 -68 also stamped into it.

    #5045587 with 1O0 - 69 also stamped into it.

    #5045182 with the numbers Q 66 stamped into it.

    (Two) #5045388 one with 10V 8-67A and the other with 10V 6-67 A stamped into it.

    Any help will be appreciated. I would also like to know the best way to check these motors to see if they are any good.

    Thanks,

    Ed

  2. #2
    Join Date
    Sep 1999
    Location
    Dbl Oak,TX
    Posts
    745
    Rep Power
    25

    Talking

    Ed, the 5045587's are power window motors for the right side of the car. I found exact listings for this number in a Buick parts list for 1969-70 A body front door on the 2 dr hardtop (-37 body type) and conv (-67 body type). Also for 1969-70 A body rear on 4dr hardtop (-39 body type). This list only covered 64-70 A body Buicks.

    I think the number will fit on many more GM cars and years. It was installed by Fisher body, so it was not a special Buick part. A 1971 Cadillac Master Parts List shows it to be correct for all 54-70 models and some 71s.

    The number seems to have been around for only a few years beginning in the late 60s. Earlier and later parts lists show different numbers for this motor application, but lots of models and years used the same one.

    The 5045388's are power seat motors. Exact listings show this number for the horizontal and vertical motor on all 66-68 Buicks with 6-way bench seats.

    It was also used on 69 A-body Buicks with 4-way power seats for the horizontal and vertical motor, except for bucket seats. It was the second type motor of 3 types used on the mid-size models that year.

    The others have not shown up in any lists yet. A quick check of the 65 Riviera headlight motor and various station wagon tailgate window motors show similar 5045xxx numbers, but no matches.

    Will report more as hopefully additional info becomes available.
    What has been, can be again. (Bob Wills, 1942)

  3. #3
    Join Date
    Sep 1999
    Location
    Dbl Oak,TX
    Posts
    745
    Rep Power
    25

    Cool

    The 5045412 shows up in the 67 Chilton's Parts and Time Guide. The application is the 65-67 Riviera headlamp door actuator motor.

    The 5045388 also shows up in the 58-64 Canadian full-size Buick Parts book for use on the 64 LeSabre/Wildcat/Electra 225 cars using 6-way power seats (as horiz & vertical motor).

    No dice on the 5045182 so far. If it has three wires that are red, yellow and green, it probably is a power seat motor something like the others.

    The headlight motor and the window motors are the series-wound type from all indications. This type of motor should not be operated on 12V test power without a load applied. The armature can overspeed and wreck just like on a starter motor.

    The window motors should not be powered up when out of the door, even if the regulator mechanism is attached. The motor will easily run off the end of the sector gear, because the window assembly is not there to limit the arm travel. When the motor runs past the end of the sector gear, the arm will kick violently. This is due to the counterbalance spring being turned loose.

    The power seat motors are the shunt-wound type and can be powered up with no load. They probably should not be run for more than a minute at time without having time to cool off. The case is the (-) terminal. Connecting the hot (+) lead to the red wire and the green wire will make the motor run one direction. Connecting (+) to the red and the yellow wire will make it run in the reverse direction. Still, if the speed seems to get too high, shut down the test.

    An ohmmeter can be used to test the headlight motor and window motors to see if they are burned out. Each lead on the window motor should show a circuit to the case. The reading should still be there when turning the shaft by hand (no dead spots).

    The headlight motor will show a reading to case from only one lead if the motor has reached the end of its travel. There are limit switches that cut the motor off when the headlight door goes full open or full closed.
    What has been, can be again. (Bob Wills, 1942)

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