Kicker key amp with kicker 1200 watt amp problem

[somewhereApollo]

I am trying to use a kicker 200.4 amp with the plug n play kits wiring harness which reaches out to a kicker 1200 amp and 12” subs in the back. I am able to get the amp on, but the kicker subs are not playing anything from the harness attachment rca jacks. Is there any possible reason for this?

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[F OR D]

i'd ping plugnplay. could be anything from wiring bad or inverted, sp setting, fuse, etc. they should be able to walk you through troubleshooting steps.