Menu
Forum
What's new
New posts
Live Activity
Search forums
Members
Registered members
Classifieds Member Feedback
Car Audio Discussion
General Car Audio
Car Audio Build Logs
Car Audio Equipment
Subwoofers
Speakers
Amplifiers
Head Units
Car Audio Help
Wiring, Electrical and Installation
Enclosure Design & Construction
Car Audio Classifieds
Car Audio Classifieds
Car Audio Wanted
Classifieds Member Feedback
Gallery
New media
New comments
Search media
SHOP
Shop Head Units
Shop Amplifiers
Shop Speakers
Shop Subwoofers
Shop eBay Car Audio
Test
Forum
Search
Search titles only
Search titles only
Log in / Join
Search
Search titles only
Search titles only
What's new
New posts
Live Activity
Search forums
Members
Registered members
Classifieds Member Feedback
Menu
Reply to thread
Forum
Car Audio Help
Wiring, Electrical & Installation
help for a first time installer
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
<blockquote data-quote="keep_hope_alive" data-source="post: 8667656" data-attributes="member: 576029"><p>Nice job organizing your question.</p><p></p><p>The RCA from the Metra harness are used when the car has a factory external amplifier that accepts low level signals. This is trim specific (meaning higher trim levels likely have the external amp while lower trim levels may not). You'll want to verify that your specific vehicle has the amplifier. One quick test would be the resistance measured at the speaker wires into the car. If you measure around 4 ohms then you don't use the RCA and you power the speakers from the head unit. If you measure around 1,000ohms (or more) then you use the RCA.</p><p></p><p>The manual for the new head unit will have an explanation of the extra wires. Orange wires are for dimmer and illumination. Need to coordinate their use with the vehicle and the radio. Dimmer adjusts the brightness of the display to match the dash lights. Illumination switches between daytime and nighttime dash lighting settings. </p><p></p><p>P.Ant is power antenna switched 12V when the factory FM antenna has a built-in amplifier. P.Cont is usually switched 12V for the factory amplifier needing a turn-on signal. The Key signals need to be coordinated with the instructions, that isn't typical nomenclature. </p></blockquote><p></p>
[QUOTE="keep_hope_alive, post: 8667656, member: 576029"] Nice job organizing your question. The RCA from the Metra harness are used when the car has a factory external amplifier that accepts low level signals. This is trim specific (meaning higher trim levels likely have the external amp while lower trim levels may not). You'll want to verify that your specific vehicle has the amplifier. One quick test would be the resistance measured at the speaker wires into the car. If you measure around 4 ohms then you don't use the RCA and you power the speakers from the head unit. If you measure around 1,000ohms (or more) then you use the RCA. The manual for the new head unit will have an explanation of the extra wires. Orange wires are for dimmer and illumination. Need to coordinate their use with the vehicle and the radio. Dimmer adjusts the brightness of the display to match the dash lights. Illumination switches between daytime and nighttime dash lighting settings. P.Ant is power antenna switched 12V when the factory FM antenna has a built-in amplifier. P.Cont is usually switched 12V for the factory amplifier needing a turn-on signal. The Key signals need to be coordinated with the instructions, that isn't typical nomenclature. [/QUOTE]
Insert quotes…
Verification
Post reply
Forum
Car Audio Help
Wiring, Electrical & Installation
help for a first time installer
Top
Menu
Home
Refresh