Diagrams - Find Land Rover parts at LR Workshop LR Workshop. LR Workshop is the free, community generated database of Land Rover parts information. This site aims to become the defacto source of information on Land Rover parts, by being more accessible than Microcat, more unbiased than the retailers, better curated than the forums and more accurate than all of them! Series IIa Wiring Diagram - Aloha Rovers Series IIa Wiring Diagram. This Color diagram was provided by fellow LRO Mail List member Keith Cutler. This is for an early, positive ground Series IIa Land Rover.