I need to know which relay is the turn signal relay. There are 7 relays
on 1996 Chevrolet S10

There are 3 relays in the glove box and 4 under the hood

Asked by for the 1996 Chevrolet S10
I will email a picture of the location to the email address you posted this question from.

If you need a wiring diagram specific to your Chevy there is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate