Problem after installing new deck

[xNaStYx 10+ year member]

Well after installing a new deck for my friend we came into some problems. Only the right front speaker works properly. The left front speaker sounds like it would be playing off a cell phone, its very faint compared to the right front. Neither of the rear speakers work. I am positive that everything is hooked up right. He says that all of the speakers worked perfectly before we did anything. Could it be a bad deck? If not, what could be the problem?

-Thanks

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[Bassin Buick]

very well could be a bad deck. i bought a "new" kenwood mp342U off ebay awhile back and one channel would not play until the radio was on for 15 minutes or so and it would randomly go into protect sometimes when i turn on the car.

 

[daboyfrumdabx 10+ year member]

Try running each speaker off that front right channel. If they play that way, you know it's not the speakers and will narrow it down automatically to the wiring or deck. Go from there.