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Our EVC module can be expanded to control two valves simultaneously. Connectors A and C are the outputs for the valve motor. Either A or C can power your exhaust valve motor.

The valve motor must have a ground and power signal, which are supplied by the EVC box.

Connector B in the center of the EVC box is connected to the chassis wiring. The chassis wiring will supply the EVC box with power and ground to control the valve motor.

B2 - should connect to a chassis ground, per the eyelet on our harness.

B3 - should connect to the underdash fuse box. This must be a key on 12v source. There is an inline fuse for protection.