Most caravans/camper trailers have a grey Anderson plug, used to charge the batteries in the van whilst your towing. We can also install an ignition relay to ensure your vehicles start battery cannot go flat whilst pulled over. Red anderson plugs are usually used if a van has sway control.
We may ask you for a wiring diagram from your caravan manufacturer, if we are unable to view the van in person. Its important that we run the correct guage cable for your charging sytem.