wire schematics what does this mean

[gearheads78]

The little circle loop between the a and b wire what does this mean? I have a problem with my wifes van and I think i found the problem but the loop thing is throwing me off.

https://static1.pt-content.com/images/pt/2010/04/674door-1.jpg

[gearheads78]

never mind it just means the wire is twisted

[DoABarrelRoll]

(twisted) for shielding

[John S]

twisted pair for attenuation in a single jacket. If it were shielded there would be a line coming off it to ground.