w0127

When my headlights are on, all four tail lights turn on like this https://www.flickr.com/photos/8913726@N02/6594936681 But before I took my car in for a service, only the lights on the boot lid (the bigger ones next to the reverse lights) turned on while the smaller ones remained off unless I put my foot on the brake. So how can I rewire them correctly so that the smaller lights only come on when I brake? I'm hoping it won't be too difficult to fix. Thanks.