So I've found that if I have my sub and amp hooked up to my system when it's on the car's electricals (and idle) go whack, every few seconds the revs drop, lights dim, etc for a second, then go back to normal.
This is even with the volume muted so i don't think its because of large current draws causing a voltage drop.
If I disconnect the amp's remote turn-on wire, or if the system is off, everything's fine.
watch the vid closely (revs dip everytime lights dim):
what's going on? the setup was all working fine for 4 months and now this has suddenly happened. grounds are ok, connections clean, new battery, fuses seem to be fine? I don't see any reason for the alternator to be bad, had it tested recently.
ideas? car is totally fine otherwise.
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