06 PAC C2R-FRD1 wiring harness help
11-30-2010, 10:29 AM
#31
Join Date: Nov 2010
Location: MO
Posts: 11
Why cant any of you guys be local??? 
I have put in about 5 or 6 of these in freinds cars and none of them did this.
The only thing i need checked is the acc. input voltage in and out as well as the constant 12v when the power drops.I havent been able to verify this issue so its hard to replicate as well as verify it for the engineers.
For turn on pop, use a 1000-1500 ohm resistor on the blue/white from the radio to the amp turn on.
I have put in about 5 or 6 of these in freinds cars and none of them did this.The only thing i need checked is the acc. input voltage in and out as well as the constant 12v when the power drops.I havent been able to verify this issue so its hard to replicate as well as verify it for the engineers.
For turn on pop, use a 1000-1500 ohm resistor on the blue/white from the radio to the amp turn on.
11-30-2010, 11:40 AM
#32
Join Date: Nov 2010
Location: MO
Posts: 11
Here is a snapshot of the failure: Yellow is +12v (NOTICE: 15v while car is running, failure only occasinaly happens when car was @ 12v/engine off, but ALWAYS hapens when car is running/alternator charging). Green is AMP switch wire (+5v). Red is ACC out. Notice how when the bass hit the +5v jumped up to 11v (IE Voltage regulator failure) then dropped to 0v, at the same time ACC drops to 3v.
In conclusion I feel the voltage regulator is failing due to high input voltage from the alternator, or it cannot handle the draw of the amps (only front subs was plugged in to the +5v at this point.)
11-30-2010, 02:07 PM
#33
4th Gear Member
Join Date: Feb 2006
Location: So. Cal,the O.C.
Posts: 1,538
Thanks for calling in Richard.Im sooooo glad you knew how to test what was being asked.I had so many calls this morning from backyard installers i was beating my keyboard.
for those having the same issue, you need to put a diode on the amp turn on wire so it doesnt feed back to the module.The cathode (stripe)will be towards the amplifier
Let me know if theres anymore issues.
for those having the same issue, you need to put a diode on the amp turn on wire so it doesnt feed back to the module.The cathode (stripe)will be towards the amplifier
Let me know if theres anymore issues.
11-30-2010, 11:13 PM
#34
Join Date: Nov 2010
Location: MO
Posts: 11
Shaker amps Backfeeding 12v
After a little bit of diagnosis/trouble shooting with an engineer at PAC we found that the Shaker amps are backfeeding 12v into the C2R-FRD1 unit when at high load (we speculate this was originaly to tell the Ford HU to lower volume output). This is causing an overvolt condition in the C2R-FRD1, the elctronics are designed to operate at 5v. So when 10+v was put into the unit the chips started to malfuniction and then shut down. The Diode keeps the voltage from backfeeding the unit, I used a 1N4005. I think you can get these at your local Radio $hack, we have several thousand on hand LOL! Anyway the diode did the trick, no more cut-outs, no more reboots! YAY~~~~~ 
12-01-2010, 06:22 AM
#35
Thread Starter
Join Date: Oct 2010
Location: NC
Posts: 40
Wow that's great troubleshooting and a nice scope mnemonic. Mine's like 30 years old lol. I also noticed the problem was way worse with the car running. I guess I will be tearing into my dash to install a diode instead of troubleshooting the issue. So the back feed voltage is coming through the amp turn on wire? I have a few of those diodes laying around, and you put it on the blue/white amp turn on wire that comes out of the PAC I take it?
12-01-2010, 06:50 AM
#36
Thread Starter
Join Date: Oct 2010
Location: NC
Posts: 40
Actually, I think I'm wrong on the wire. It's the amp turn on wire that goes from the 8 pin harness to the PAC correct? I think it's green. The blue/white wire is from the head unit to the PAC and not the correct one.
12-01-2010, 04:04 PM
#39
3rd Gear Member
Join Date: Dec 2006
Location: Chesapeake, Va.
Posts: 523