Where to source this wire and connector?

Wipers started to turn on randomly and washer fluid not spraying. Turns out the blue wire connected to the jar has corroded and broke. Where do I find the part for this?

 

Splice it. You have enough on each side. Doesn't have to be perfect, it's a wiper fluid res. Not mission critical.

 

What’s the correct wire gauge and resistance to use?

 

If it's just the blue wire I'd used a butt connector to fix it. If you have to put more wire in there just about any wire that is the same gauge or bigger will do the job.

Here's a link to what I'd use


https://www.amazon.com/Electrical-Connector-Connectors-Insulated-Waterproof/dp/B09N3P2SNL?crid=IS0IBDUU0EEW&dib=eyJ2IjoiMSJ9.HW7kYv7ufZHmnmgc5B7dmn6gCYyiMs7T5efAs_oi52Jrw7wUsYolRZlddkNH3dfaft9prrSOGtMPJhgiuhLXGudjUriw5G7JO6fidaqs8sJeKgvny_qpRwbLZyEGGnG5MQx8HxK_nLB8qyaD-BXwG6aPcWGt2VIxDMsscjXW263L0qAwlV6D5h-5gYnUWjlBeHkMp9enxZDGXXjiCRQkmZyeKvsjd75Co5n9Bydzjuo.dDh7yNwn0jAphg82SmesnNCTrMrIMMBSIonexhbLF94&dib_tag=se&keywords=butt+connectors+heat+shrink&qid=1709396479&sprefix=butt+c%2Caps%2C134&sr=8-2

 

I'd use 16 or 18 AWG. Again, such a small splice no need to worry. Just patch it and go.