Backglass defogger is not working even though the circuit is complete

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Hi, My glass defogger was not working so, I attempted to trace the problem using a multimeter. I found that the circuit was not complete so I reattached one of the tabs using special adhesive now the circuit is complete. Now, if I connect any part of the defogger grid with any negative terminal, I can see the voltage of 14 V. But still, the defogger is not warming up, why? Please help. In one of the youtube videos, I saw there should be voltage drop than the main terminal. Could it be the cause? If so, how can I take care of that?