| This listing is for the thermal time switch for all injected z's from 75-83, except turbos. It is located on the front of the thermostat housing. It's a dark brown, and it uses a 2 wire EFI connector to connect it to the cars wiring. On the 75-79 z's, make sure that you have the correct plug in hooked up to it. It should be the dark brown connector, and on the other end of the pigtail it should have a piece of red tape wraped around it. This switch is used to activate the cold start valve otherwise known as the 7th injector. This is a special order part, please allow an extra week for delivery. Last update 01/12 | 
