I fitted spot lights to my Jcb Telehandler 535125 and wanted them to work of the high beam. When I came to the wiring I tested them in the back of the light switch by placing cable into the harness to make sure I got the right wires before joining the cables. But I put them in the wrong place and f**ked everything up. now the head lights and high beam don’t work also the front wipers don’t work, the side lights and the high beam flash work. I’ve checked the fusses and the relays and they are fine. Any ideas on how to fix?