Sounds like a feed back on the ground point to me. Seat bolts are not the best place to ground an amp for the y usually have a sealant on the bolt which in turn makes for a bad ground . Always make a fresh ground point by sanding an area and drilling a fresh hole
Looking to trade 07 18' Limited wheels & Tires for the 07 XLT/Appearance 17" 5-spoke
My Truck has 7,700 miles looking for comparable Located in Goodman, MO. just south of Joplin, MO. just north of Bentonville AR
I currently have XM/Sirius/GPS antennas all running out the third brake light. in my years of experience you get far better reception with the antennas on the outside. besides my 07 has the heated windsheild which would interfere. Yes that is the wire going to the wiper motor.
The wire color is purple/orange there is more than one in the harness so you may have to try more than one. My unit is the AVIC-Z1 works perfectly. Uploading pics now....give me a few minutes
I am in Grove Oklahoma. I will probably be ordering the trac tommorrow...so it will be at least 6 weeks before it is here , -was just seeing if there would be any interest in trading wheels. prefer the look of the XLT .......I'm old school