# Harness wire Cross linked polyethylene insulation recommended. https://www.waytekwire.com/item/WM20-3/WM20-3-Automotive-Cross-Link-Wire-/ Orange https://www.waytekwire.com/item/WM20-6/WM20-6-Automotive-Cross-Link-Wire-/ Blue PVC insulation like UL1007-20AWG acceptable but second choice.