I have a CNG car (Suzuki Cedan Model 1993). My CNG switch is not work well in the

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morning.? I have a CNG car (Suzuki Cedan Model 1993). My CNG switch is not work well in the morning. I have to connect a wire from batery positive terminal to the CNG switch. When I ignitiate my car than all CNG switch lights on and my car started successfully. I turn off the car again and again and I started the car normally with half self. No wire is connected to the switch to baterry terminal. But again in the next morning I again see this problem. Is this is a generator problem or switch problem?? I'm waiting for your expert reply.