Pfaff 1222 sewing machine switch

It looks like the original switch was double pole. (This breaks both the live and neutral connections.) The manufacturer would not used a double pole switch if they could use a single pole swictch which would be cheaper. Also the single pole white switch looks a very light duty low current switch. I suggest ordering the CORRECT switch from a Pfaff spares stockist.
Les.

Thanks. I just wired it incorrectly and popped a fuse. Given up on it for a bit. The guy I bought the switch off promised it would work...

It could be made to work by not switching the neutral.
Counting from the left is the brown wire at position 1 and the blue wire at position 3 the mains input cable ? Check this by measuring the resistance between the brown wire and the live pin on the mains plug and between the blue wire and the neutral pin on the mains plug.

Les.

I see this thread is already resolved, but I wanted to share my experience in case it helps someone else facing a similar issue. I had a similar problem with my Pfaff 1222, where the original switch failed, and I tried replacing it with a standard switch. Initially, I wired it incorrectly, which caused a fuse to blow, just like in your case.

After troubleshooting with a multimeter, I realized the original switch was a double-pole switch, cutting both live and neutral, while my replacement was only a single-pole. I ended up sourcing an original Pfaff switch, and that fixed the issue perfectly.

For anyone struggling with this, I’d highly recommend checking the wiring before installing a new switch and ensuring it's the right type. I’ve written about various troubleshooting guides and DIY fixes on my website, Thread Whisper, which might be helpful for others dealing with similar electrical issues. Hope this helps someone in the future!

misty said:

Hi,
I was wondering if anyone here has successfully replaced the red on/off switch on a Pfaff 1222? I took the switch out and now, because I'm a muppet, I don't know where to put them in the new switch. The old switch has 4 holes for wires but the new one only has 2. The guy I bought the replacement switch off says it's OK, I just have to connect the wires with the switch but I think getting the right wires in the right place is going to be crucial. I'd really like to get the sewing machine pieces off my dining table for Christmas. Thanks in advance.

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If the new switch only has two terminals, it's likely a simple on/off switch. Just connect one wire from the power (live) to one terminal, and the other wire going to the motor or circuit to the second terminal. It doesn't matter which goes where as long as both are connected properly. Before closing everything up, test to make sure it's working.