trigger for the relay is from one of the wires going to the diagnostic socket - I could go and look and tell you which wire, or search around on here - that's how I worked it out. i used a fancy connector the name of which escapes me at the mo, (Pozitap???) but is dead simple and just puts a pin prick in the insulation. This comes as part of an Eastern Beaver 3-way accessory fuse block for the switched circuits. Its all rammed in under the frame brace / top of the rear shocker. http://www.easternbeaver.com/Main/Wiring_Kits/Fuseboxes/3_Circuit/3_circuit.html Excellent quality stuff.
