help with system

[squid88 10+ year member]

so I just tested out my equipment in a friends car and amp and sub work so is the only thing it could possibly be is my headunit bc my wires seem to be working bc the amp lights up but I just don't get any output

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[fatboyracing 10+ year member]

What does it do and has it all worked before

 

[teamd0m1nat3 10+ year member]

i would check the back of the HU first and make sure the rca's aren't loose

 

[fatboyracing 10+ year member]

or if the sub output is turned on in the cd player ? with out knowing the equipment

 

[squid88 10+ year member]

I've checked all the connections and it worked before and then just stopped I e tried differnt RCAs and I've tested the amp and sub of another unit and worked