Abstract: An insulation displacement connector is provided that has two housings. The first housing encloses surge protection. Terminals extend from the first housing. The second housing has insulation displacement terminals with first ends for connection with insulated wires and with second ends for connection to the terminals extending from the first housing. The two housings are to be joined together to complete an electrical line from one insulation displacement terminal to the other via the surge protection. Thus, surge protection is in one sub assembly protected from the environment, and the insulation displacement terminals are in another subassembly protected from the environment. The housings have a detent assembled condition enabling relative positional adjustment before joining of the housings. Electrical testing for the line circuit and for the surge protection may be performed upon the closed assembly.