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66032 Decoder with 60943 motor - Trying to upgrade motor
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Offline johnhendry  
#1 Posted : 06 October 2025 00:06:25(UTC)
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johnhendry

United States   
Joined: 06/11/2024(UTC)
Posts: 59
Location: Georgia, Atlanta
Guys, I’m sorry if this is posted somewhere, I’ve searched and can’t find it. I’m trying to upgrade my Railbus that is currently running with a 66032 decoder with the original motor. I have installed a 60943 motor but I’m struggling to work out the wiring. I don’t know where to connect the brown and black wires from the decoder. My other 60943 motors don’t have that black wire at all. IMG_3090.jpeg
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Offline H0  
#2 Posted : 06 October 2025 09:50:53(UTC)
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H0


Joined: 16/02/2004(UTC)
Posts: 15,495
Location: DE-NW
The decoder is for AC/DC motors with three connections, the new DC motor only has two connections.
It is easy to connect a modern decoder to the old AC/DC motor.
But I do not see an easy solution to connect the old decoder to the new motor.
Regards
Tom
---
"In all of the gauges, we particularly emphasize a high level of quality, the best possible fidelity to the prototype, and absolute precision. You will see that in all of our products." (from Märklin New Items Brochure 2015, page 1) ROFLBTCUTS
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Offline mvd71  
#3 Posted : 06 October 2025 10:12:04(UTC)
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mvd71

New Zealand   
Joined: 09/08/2008(UTC)
Posts: 1,951
Location: Auckland,
I’m afraid it can’t be done, the 66032 decoder is for an AC motor only. If you want the better running characteristic you will need a 60972 or equivilant.
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Offline H0  
#4 Posted : 06 October 2025 10:30:01(UTC)
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H0


Joined: 16/02/2004(UTC)
Posts: 15,495
Location: DE-NW
Originally Posted by: H0 Go to Quoted Post
But I do not see an easy solution to connect the old decoder to the new motor.
I thought about it and I think it can be done with two additional diodes.


Regards
Tom
---
"In all of the gauges, we particularly emphasize a high level of quality, the best possible fidelity to the prototype, and absolute precision. You will see that in all of our products." (from Märklin New Items Brochure 2015, page 1) ROFLBTCUTS
UserPostedImage
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Offline H0  
#5 Posted : 06 October 2025 10:33:39(UTC)
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H0


Joined: 16/02/2004(UTC)
Posts: 15,495
Location: DE-NW
Originally Posted by: H0 Go to Quoted Post
Originally Posted by: H0 Go to Quoted Post
But I do not see an easy solution to connect the old decoder to the new motor.
I thought about it and I think it can be done with two additional diodes.
I searched the Internet.
The solution was documented on Dr. König's site and also on the old marklin.com site, but both sites are gone.

Regards
Tom
---
"In all of the gauges, we particularly emphasize a high level of quality, the best possible fidelity to the prototype, and absolute precision. You will see that in all of our products." (from Märklin New Items Brochure 2015, page 1) ROFLBTCUTS
UserPostedImage
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Offline johnhendry  
#6 Posted : 06 October 2025 15:09:47(UTC)
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johnhendry

United States   
Joined: 06/11/2024(UTC)
Posts: 59
Location: Georgia, Atlanta
Thank you guys! I really appreciate that - no wonder I was having trouble. We’re going to just get the new decoder too.
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Offline mvd71  
#7 Posted : 07 October 2025 09:03:31(UTC)
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mvd71

New Zealand   
Joined: 09/08/2008(UTC)
Posts: 1,951
Location: Auckland,
Originally Posted by: johnhendry Go to Quoted Post
Thank you guys! I really appreciate that - no wonder I was having trouble. We’re going to just get the new decoder too.


That’s a good solution, will work well and you still have the old decoder that can be used in another analogue loco if you want a cheap digital conversion.
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