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<blockquote data-quote="naiku" data-source="post: 1890945" data-attributes="member: 563468">The gain thing makes sense, I am going to pick up one of those RCA adaptors today and try that to see if the right channel works with that method. If it does then I am narrowed down to it being something on my speaker/high level input connections.It&#039;s an Aura RPM 4200, it does have a year&#039;s warranty on it, so if all else fails I will be returning it. I contacted the manufacturers tech support who got back to me and also suggested that it could be a connection on the speaker/high level input connections.Fingers crossed the RCA/MP3 player test will give me an output on all 4 channels, if it does I will be checking the connections there (or simply scrapping the speaker level input and getting an LOC).Will post back sometime tomorrow about the results.Buildmeabox, it&#039;s a 2000 F-150, I had printed a wiring diagram from the internet, but of 2 I printed my wires appeared to be a combination of both diagrams. I probably won&#039;t have time to switch the outputs until the weekend, but I am hoping that using the RCA/MP3 player method suggested by DJ-Torn will (hopefully) show that all 4 channels on the amp are good, which will then simply leave me with the speaker level input connections being the problem.I am beginning to wish I had bought an LOC in the first place (had debated it but figured since I had a speaker level input I may as well use it)Thanks for all the info, will be posting back as soon as I get any results.</blockquote>

[QUOTE="naiku, post: 1890945, member: 563468"] The gain thing makes sense, I am going to pick up one of those RCA adaptors today and try that to see if the right channel works with that method. If it does then I am narrowed down to it being something on my speaker/high level input connections. It's an Aura RPM 4200, it does have a year's warranty on it, so if all else fails I will be returning it. I contacted the manufacturers tech support who got back to me and also suggested that it could be a connection on the speaker/high level input connections. Fingers crossed the RCA/MP3 player test will give me an output on all 4 channels, if it does I will be checking the connections there (or simply scrapping the speaker level input and getting an LOC). Will post back sometime tomorrow about the results. Buildmeabox, it's a 2000 F-150, I had printed a wiring diagram from the internet, but of 2 I printed my wires appeared to be a combination of both diagrams. I probably won't have time to switch the outputs until the weekend, but I am hoping that using the RCA/MP3 player method suggested by DJ-Torn will (hopefully) show that all 4 channels on the amp are good, which will then simply leave me with the speaker level input connections being the problem. I am beginning to wish I had bought an LOC in the first place (had debated it but figured since I had a speaker level input I may as well use it) Thanks for all the info, will be posting back as soon as I get any results. [/QUOTE]

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