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little black box on hu yellow wire?


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T.Hill 
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Posted: November 20, 2007 at 2:57 PM / IP Logged  
This really isn't an important question but I'm just curious. On my yellow power wire for my headunit there is a fuse and also a little black box with what looks like a coil of some kind inside. Anyone know what the purpose of this is? This is on a Pioneer HU.
Pioneer DEH-P980BT, Zapco DCREF1000.4,Pioneer TS-C520PRS, Adire Extremis, MTX TA91002, TC Sounds TC-3000 15"
tedmond 
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Posted: November 20, 2007 at 3:54 PM / IP Logged  
isnt the yellow on pioneers the ignition turn on lead? well anyways the coil is probable a fuse holder AGU that will prevent any damage to the deck when it draws more than the specified amps.
Pioneer - red (constant 12) yellow (ignition)
but if its an older one, th eonly thing i can think of is sony wiring. they list their wires as red- ignition yellow constant 12.
haemphyst 
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Posted: November 20, 2007 at 4:04 PM / IP Logged  
It's just an RF filter... a choke, that only allows the DC necessary for the deck to function, through, while keeping the RF and ancillary noises in the electrical system, out.
You can remove it if it bothers you, but you'll probably end up getting more noise than it's worth. little black box on hu yellow wire? -- posted image.
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
coppellstereo 
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Posted: November 21, 2007 at 9:36 AM / IP Logged  
I'm pretty sure yellow is 12v+ constant and red is switched.
perly 
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Posted: November 21, 2007 at 11:30 AM / IP Logged  
coppellstereo wrote:
I'm pretty sure yellow is 12v+ constant and red is switched.
yah definately every deck I have seen it is Yellow = constant and Red = ACC
DYohn 
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Joined: April 22, 2003
Location: Arizona, United States
Posted: November 21, 2007 at 11:43 AM / IP Logged  
Sometimes the "little black box" is NOT just a filter, it is a DC to DC power supply and must be used for the head unit to operate properly.  What is the model number of your HU?
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T.Hill 
Copper - Posts: 268
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Posted: November 23, 2007 at 3:01 PM / IP Logged  
it's a 980BT, just like my sig sayslittle black box on hu yellow wire? -- posted image....sorry couldn't resist.
Pioneer DEH-P980BT, Zapco DCREF1000.4,Pioneer TS-C520PRS, Adire Extremis, MTX TA91002, TC Sounds TC-3000 15"

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