rear defroster problem

sup,i had just fix my rear window defroster. the problem was that one side did was not plug in and the wire was missing. i had to get a female plug to hook it up along with a speaker wire and connect that part to a ground. this ground is connected to the same ground on the other end( the rear window have to plug, left and right) THIS IS THE PROBLEM… my rear defroster works now :clap: but the problem is that only the top half is defrost and the bottom have is not … does anyway know why? could it be the ground ??? :hmm: i know this is long but thanks for your time

some of the lines might have been broken, check for breaks in the conductors.