Need some wiring gurus

[NismoV240 10+ year member]

So I'm installing a stereo in a friends Yukon Denali. His remote wire got pinched by the seat. So system stopped working. I soldered another wire to it and reattached to the remote terminal. Amp turned on, but no sound. The power wire has an 80 amp fuse the amps have two 30's can this be a problem? I have 15 volts at the terminal of the amp. I have 12 volts at the terminal for the remote. The ground is good. The signal from the RCA cables is good. I think I've tested everything.

I hooked his RCA cables to my amp and and my sub thumped so I know the RCA signal is good.

I hooked his subs to my amp and they thumped, so subs are good.

Now i have power to both terminal for remote and main power wire but neither of our Amps work. For the ground we lifted carped dremeled down to bare metal, drilled hole and screwed ground in that way. I have even changed grounding points. This has to be a wiring gremlin and I'm out of ideas. Could it be the 80 amp fuse in main line is to much. Please help.

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[vaiboy 10+ year member]

The fuse isn't your problem if you have voltage at the amp. First disconnect the subs, play a test tone, and check for AC Voltage at the amps outputs. (same procedure as setting gains) If you have voltage at the outputs the problem is in the subs wiring.

 

[NismoV240 10+ year member]

Will do. I hooked my amp up to the wiring and mine didn't even turn on. His does though. The power wire had like 15.5 volts and the remote 12 volts. I know my amp works cause I had it on 5 mins before swapping. I think it has something to do with the power wire, but I'm no expert and my hands are in the air so I will try any and all ideas. Thank you for the reply.