Thread Number: 41854  /  Tag: 80s/90s Vacuum Cleaners
Eureka 3712B
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Post# 442177   5/24/2021 at 19:13 (1,117 days old) by weberockin (Commack, NY)        

I have one that I love. When the wire into the chassis became worn it stopped working. Simple fix, right? Took it apart and cut away the bad wire. Put it back together But, I must have reconnected it wrong and now it sparks when I plug it in. Looking for the correct wiring schematic so I can correct the issue. Any ideas? Thank you for any help you can offer.

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Post# 442268 , Reply# 1   5/26/2021 at 20:52 (1,115 days old) by kirbyklekter (Concord,Ca.)        
No wiring diagram for it but...

your looks to be the same as the popular Eureka Ironside. It might be easier to find wiring diagram for the Ironside. Mine doesn't have the power nozzle feature so the wiring is pretty simple.I'm sure a vac repair shop could help with that for you.

Post# 442275 , Reply# 2   5/27/2021 at 01:13 (1,115 days old) by MadMan (Chicago, IL, USA)        

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Take it apart and post pics of the wiring you messed with.

I really don't want to be that guy, but it's a single load and a switch. Unless the motor's brush wires are coming into play, it's literally the simplest thing to wire.

The black wire from the cord is Line, and it goes to the switch, the from the switch to the motor. The white wire from the cord is Neutral, it comes from the cord and goes straight to the motor.

Is there more to it than that? Two speed motor? Bag filled pressure switch? If it doesn't pop the breaker when plugged in and turned on, my guess is you have some exposed wire touching something. Or you've messed with the motor's 'internal' wiring.

Post# 467052 , Reply# 3   10/25/2023 at 22:13 (233 days old) by KirbyClassicIII (Milwaukie, Oregon)        

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This 3712 replaced the prior 3711 in 1985 or 1986. The 3711 was brandywine colored and with white trim and attachments.


Post# 467085 , Reply# 4   10/27/2023 at 14:16 (232 days old) by Paul (USA)        

My research indicates that the Model 3712 was made in two types: A and B from 1985 to 1989. The color scheme appears to be the same as the upright Model 1945-BT in the 1987 ad below.

A repost of indyhoover's 1945-B shows a similar, if not exact, color scheme.

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Post# 467093 , Reply# 5   10/27/2023 at 17:49 (231 days old) by KirbyClassicIII (Milwaukie, Oregon)        

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In the 1986 J.C. Penney spring/summer catalog, there is the model 3336A in it (item 7, page 813). Item 6 is a higher-spec Mighty Mite with the aluminum wands.

I remember the 1987 J.C. Penney spring/summer edition did have the 3175 with the "Turbo-Matic" air-powered nozzle (3175A), which had a light blue housing.

Up to 1984, J.C. Penney used its own name on these cleaners; in the fall/winter '84 catalog, item A on page 1099 is of their "finest" non-power-nozzle canister that was based on Eureka's 3711, but has 3.0 peak HP instead of 4.0 and is shown with the conventional floor brush instead of the edge-cleaning brush.

As to the 3712, the very last 3712Bs circa 1990 had the then-current italicized EUREKA wordmark.


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This post was last edited 10/27/2023 at 18:08
Post# 467096 , Reply# 6   10/27/2023 at 20:36 (231 days old) by Lesinutah (Utah)        

lesinutah's profile picture
The color of the vacuum isn't going to help someone wire it.

Post# 467227 , Reply# 7   11/1/2023 at 13:43 (227 days old) by Paul (USA)        

Thanks a lot, Ben, for the JCP model comparisons and posting the catalog scans—very interesting!

Are any of the following 2000-Series models in any of your scans?

2023 (tool set)
2032 (2 versions from 2 different time periods—1 labeled 'Eureka' & one 'JCP')
2033 (")
2034 (")

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