Hey Guys,

I have had this ever since I wired up the system, and have started trouble shooting, and its driving me nuts!

When The unit powers on (even with engine off), I get a loud pitch whine through all speakers. Here are some general setup details, and troubleshooting done:

1. System - Pioneer Avic F90BT. PG RSD 500.4 Amp. PG RSDc 6.5" Comp set. Redtop Batt.

2. 0ga wiring for + and - all the way to the back. 14ga for speakers, and DBLink/Monster RCAs (most is for more gear)

3. When RCA is unplugged from amp, noise gone

4. When RCA is unplugged from deck only, noise gone

5. If you touch the male portion of the RCA to the deck chassis, noise!

6. All Power/Ground is on one side of the car, and signal on the other.

7. Battery to Chassis is 0ga

8. Deck is ground to Chassis Ground going into OEM deck harness (larger wire than the Metra kit)

Thanks

John

it could be a problem with the RCA outputs in the deck, i have seen this a few times with pioneers, i beleive there is a small fuse or something inside the unit that protects it. all cases i have experienced had been fixed with a trip to there service center for repair.

Wrap a wire around a female rca (ground) and screw it into the headunit.