Does anyone have or know if there is a wiring diagram for the Marklin 3053? One of the wires on my came off and I can't figure out where it goes. Any help is appreciated.

Here is a picture I hope you can see the wire.
Thank you for any help

Hello 279 ,


Like many on this forum, I also have this lovely 3053 classic loco (since converted to digital):






I am not a veteran with anywhere near the knowledge available from some members of this group,
being a latecomer to Märklin in 1983.
I was originally into analogue, but since 1995 my locos have been digital.

Your provided image of your locomotive innards suggests that it is analogue (because there is no
visible decoder, there is an analogue reversing unit and there is an analogue era choke which I have
circled in red) :





and provide further examples:





As noted above, I am a rather naïve Märklinist but (notwithstanding the speaker/horn connections),
the analogue choke was usually connected to the “common solder point” (circled in red below):





So , perhaps it would be worthwhile to try connecting the loose wire to the “common solder point”
/ "main solder point" shown in the image above and referenced as #4 in the circuit diagram below :








I do note from your image however that there is not enough distance from the tip of your loose
wire to where one might expect the CSP to be on the motorshield, so it was probably soldered to the
similar CSP connection on the reversing unit as shown as a blue circle on the circuit diagram
below :





I have not ever encountered the “aftermarket Märklin speaker/horn” (fascinating), nor did I know that
“the horn had to be installed in the locomotive as shown in the diagram for the 7213 and was
actuated by the 7215 unit.” – I learn something everyday on this fantastic forum ! (thanks mike C)


Regards,

PJ

If, as has been suggested, this is an aftermarket add-on horn, then I suspect that is a capacitor. But it would still need to be connected somewhere to the pickup shoe. So look for where the wire comes from the pickup shoe onto the reversing unit, and that is where I would expect to connect it.

On the other hand, if you do not have the other item that is required to make the horn operate then I would suggest removing the horn altogether.

Thanks for your help I got it working