Hi Logan, we're sorry to hear you ran into trouble, and we'd like to clear a few things up — both for you and for anyone else considering this harness.
1. Why it's a 4-channel: Even single and standard cab trucks use the same ACM (factory radio), and the rear channels can be activated with FORScan. That means you can use the radio's fade control as a subwoofer level if you'd like. We build it this way so every customer has that flexibility, whether or not they use it.
2. About the RCA tips you selected: RCA outputs on this harness carry speaker-level signal. If your amplifier doesn't have a built-in line output converter (LOC), plugging these straight in can short out your factory radio. Please unplug the RCAs right away and check your amp's owner's manual to confirm how it accepts speaker-level inputs before reconnecting.
3. Grounding: Run your amplifier's ground directly to the battery. Grounding to the cab — even the factory ground point on the rear wall — will cause noise and performance issues. Battery ground only.
4. Shipping: You're right that your order took longer than it should have — 8 business days (ordered the 18th, shipped the 30th). 99% of our products ship within 1–2 days, but other items on your order held it up. We apologize for that.
5. Please call us. These trucks are all we do, and we're happy to walk you through the technical side and get your system sounding the way it should. We're available Monday–Friday, 9am–6pm CST.
Thanks again, and we hope to hear from you soon.
