Q: What is the purpose of relays in Chevrolet Blazer,S10,GMC Jimmy and Sonoma and how can a faulty relay be identified and fixed?
A: First, several electrical accessories in the vehicle use relays to transmit the electrical signal to the component and if the relay is defective, that component will not operate properly. The various relays are grouped together in several locations like the engine compartment. If a faulty relay is suspected, it can be removed and tested.