Genuine 2003 Mazda Protege Relay Boxes

2003 Mazda Protege Relay Boxes Parts and Q&A

• Q: What role do Relay Boxes play in the operation of electrical accessories, and how can they be tested for defects on 2003 Mazda Protege?

  A: Vehicles have electrical accessories that involve relays to pass the signal, this is to control high current circuits using low current. Bad relays are an impediment to the functioning of the components, and they are common in engine compartments and fuse boxes. Testing entails continuity, and resistance checks; faulty relays have to be changed so that they can work accordingly.