Thread Number: 42172  /  Tag: Recent Vacuum Cleaners from past 20 years
Help! Royal 4000 wiring diagram 		[Down to Last]

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Post# 444257   7/31/2021 at 17:24 (998 days old) by fantomfan57 (Central Texas)        

Does anyone have a diagram? Started with the headlamp not working. I unscrewed the metal plate to get access to the wire ends...to check Continuity. Found one wire to the bulb, was bad.

Replaced the socket and wire only to realize when I had not made a note of which wire was wired to what.

This metal plate has two holes, one to hold the power wires coming in from the handle and a separate one to bring in just the wires from the headlamp socket.

I have so far connected what I thought was the right combo., and the machine would come on but not the headlamp. Unless the package of bulbs are all bad (ebay order for 10 for Kenmore PNs.) I am not joining the right wires.

from the motor compartment I have a black, white and yellow.

What am I doing wrong?

Post# 444273 , Reply# 1   7/31/2021 at 23:23 (998 days old) by MadMan (Chicago, IL, USA)        

madman's profile picture
Assuming 120v light bulb and one speed motor.
The bulb must have one white, and the other wire is the same that comes from the switch to the motor.

Post# 444277 , Reply# 2   8/1/2021 at 00:17 (998 days old) by Lesinutah (Utah)        
The

 lesinutah's profile picture
Light has a positive and negative. The cord has a positive and negative. The motor has positive and negative. There should be a ground coming from the motor.
This is either the 9.0 amp or the 10.5 amp which means you have a drop in motor and most the wiring is inside the drop in motor.
The positives would tie together there usually black, red or blue. The negative All connect together. White, black with white stripe, red with white stripe. Yellow is either ground or negative.


Post# 444283 , Reply# 3   8/1/2021 at 03:35 (998 days old) by fantomfan57 (Central Texas)        
Understood....

 What group do I connect the yellow wire (ground?) to?

Post# 444287 , Reply# 4   8/1/2021 at 08:07 (998 days old) by Centralvacs1928 (Chicagoland)        

The Royal 4000 had a "drop in" style motor with an extra tap off the field coil to supply 12 volts to the bulb. The wiring goes:

Black from handle to black motor
White from handle to white motor and white lamp
Yellow from motor to black lamp

The proper bulb is a 12 volt double contact bulb.

I suppose there's no reason you couldn't wire it to use 120 volt double contact ("standard") bulbs, in which case you would cap off the motor yellow wire, and connect the black from the lamp to the black motor and handle.

-Owen

Post# 444288 , Reply# 5   8/1/2021 at 08:09 (998 days old) by Centralvacs1928 (Chicagoland)        

And I think the problem you are having may be that your machine is wired properly but the bulbs you bought are for 120 volts, so 12 volts won't do much for them. All Kenmore PNs to my knowledge used 120 volt double contact bayonet bulbs.

Post# 444303 , Reply# 6   8/1/2021 at 14:40 (997 days old) by fantomfan57 (Central Texas)        
Thanks....

 to: MadMan, Les and Owen.
Owen, I saved the instructions to my computer notepad. I also will make sure to mark/tag wires to make sure I get the correct one's matched up.
Your responses are appreciated.
The original problems was one of the wires from the bulb socket lacked continuity. The replacement took care of that.

BTW, works like a charm. I had no idea the bulbs needed to be 12 volts. I had a buddy explain some more about that "extra" wire from the motor. Looks like I can use bulbs I have for my truck.

THANKS!

Post# 444305 , Reply# 7   8/1/2021 at 15:13 (997 days old) by MadMan (Chicago, IL, USA)        

madman's profile picture
Incidentally, converting from 12v to 120v bulbs is not straight-forward in terms of the light bulb socket. A double contact 12v bulb has the bayonet pins offset so it can only be installed one way, a 120v bayonet socket does not have offset pins. Besides, I think most 12v bayonet vacuum bulbs are not the double contact ones, but the single contact ones.

Post# 444319 , Reply# 8   8/1/2021 at 19:15 (997 days old) by fantomfan57 (Central Texas)        
Thanks....

 MadMan, I did not notice that. The bulb I have has aligned pins, must be a Kirby.
I shall check in the morning.

Take care.

Post# 444366 , Reply# 9   8/2/2021 at 18:17 (996 days old) by Lesinutah (Utah)        
Bulbs

 lesinutah's profile picture
If you get the dual bayonet bulbs get the dual polarity. That way continuity isn't an issue. Glad you got it fixed. It's been a while since I worked on a royal with a drop in motor.

Post# 444440 , Reply# 10   8/5/2021 at 10:00 (994 days old) by fantomfan57 (Central Texas)        
Wellll.....

 So, that bulb I talked about did indeed have one contact. Then I tried what I think was a 12volt, and it burned out immediately. I retried Kenmore PN bulbs and they lit up fine.

So now I want to get several belts made for Royal Uprights.

Cheers!




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