Metra 70-5521 Radio Wiring Harness for Ford 03-Up Amp, computer

I used this harness to upgrade to an aftermarket head unit on my 2005 f250 6.0. Worked flawlessly. My new headunit did not come with steering wheel control functions and says you have to buy the harness for it seperately. You do not. Its a very simple process to retain your functions that i learned about way later.Your upgraded headunit will have a harness included. On that harness it will have a wire labeled "Steering wheel key (+)" and it is orange with a black stripe (atleast on mine)Your stock truck harness will have a blue/red stripe wire on Pin #18 that you must tap into. You dont have to cut it, you can simply military splice it, or use a T-tap to connect the SWK wire on your aftermarket radio harness to connect to your factory harness. Once you connect this SWC(+) wire onto the blue/red wire.. you will be able to setup your functions on your radio.Thats it. One wire. No need to buy the access module or the maestro kit thats around 100 if you have a powerstroke. Hope this helps someone.

If you’re using this, look into other accessories to retain steering wheel control too. Draw a wiring diagram. Make sure you have everything you need. It works perfectly. Used it to install KENWOOD DDX9707s on a 2010 Lincoln Towncar. Glad I bought it. Make sure you buy butt connectors to connect the harness with your radio/steering wheel control

perfect, color to color

Artículo bueno,lo use en mi Mustang 2005.

The Radio/GPS/Entertainment module I bought didn't come with a harness to make the connection between the Car and the module. I had the radio installed, and the tech that did the installation made the solder connections. All is well, I'm satisfied with the harness, but the Radio/GPS, is acceptable, but not outstanding. It is probably too complex and the instructions weren't easy to understand. Written by Non-NATIVE-ENGLISH-SPEAKING AUTHORS, which I have found to be a problem with other electronic equipment I have purchased.

Metra 70-5521Crutchfield claims this kit does not exist or work on my 07 Mustang with the Shaker 500, and insisted I purchase an expensive PAC kit that requires soldering a diode.With the 70-5521, there are 2 harnesses. The large one is for the main radio harness, the smaller one is for the Shaker 500 subwoofers. You will need a LM7805 or equivalent voltage regulator to convert a 10-15 V signal into a 5V signal.The LM7805CT voltage regulator was needed because the Ford factory Shaker 500 amplifiers require a 5V turn-on signal, while aftermarket receivers use 12V turn-on signals for the amps. This results in a pop or overload of the amp turn-on. The LM7805CT seems to do the trick, and I was told by other Mustang owners not to worry about heatsinks or cooling the regulator because the current/power dissipation isn't that great.I also observed that it was definitely possible to tap into the light/illumination leads for either the message center harness or the HVAC harness to enable the dimming feature on the CX501, but I opted not to touch the factory wiring. The main factory harness does NOT have a power antenna (solid blue), amp turn-on (blue/white) or phone mute (brown) so those must be sealed/wrapped off on the big Metra harness. The smaller Metra harness that goes to the Shaker 500 will have a pair of amp turn-on leads (blue/white) that attach to the OUTPUT side of the LM7805. The INPUT side of the LM7805 goes to the amp turn-on lead coming from the receiver harness. The RCA inputs for the Shaker 500 subs go to the appropriate RCA jacks on the back of the receiver. I soldered all of the ground leads together which goes back to the receiver harness ground lead.I used solder and heatshrink wrapping and can confirm that this wiring kit will work on a 05-09 Mustang (or at least the 2007).Overall: 5/5 stars, very inexpensive, not hard to use, just remember to buy a 5V regulator from Radio Shack - I opted to buy my Fairchild LM7805CT from Digi Key so that I knew I was getting a quality regulator.

Picked this up to swap out a malfunctioning head unit from my 2006 Focus ST that was equipped with the audiophile stereo package... the harness for the main head unit was a perfect fit and worked perfectly. the harness for the subwoofer option plugged right in but when it was all said and done the subwoofer was making a LOUD buzzing sound that drowned out music unless you had the volume up way past what I would normally listen to. I fixed this by installing a switch in the "remote line" of the head unit to "turn off" the subwoofer when driving around town with the radio volume down. But that annoyed me more because anytime i was driving anywhere other than the highway (with a lot of road noise) there was literally NO bass on the stereo.Did some research and found that the adapter harness was made incorrectly for my application. there are 8 open spots on the harness connector and my two blue wires (for power and ground) were both on the far left of the connector top and bottom. the blue wire on the bottom was the "system ground" and was in the wrong place. I used a small screw driver to unpin the connector and relocated that wire to the #2 pin position replugged it all in and it works perfectly. Buzz is gone and im finally happy with the install.This ISNT a hard fix at all (i used a tiny screw driver and it took maybe 60 seconds to unpin and slide the wire back into the right port on the connector) but the time it took me to figure it out was kinda crazy. Just a warning that you may have to do this too for your install.Ive included a photo of what the CORRECT pin out should be for the connector...The Connectors pin out is as follows. (as purchased)1234 1: POWER 2: EMPTY 3: RCA+ 4:RCA -5678 5: GROUND 6: EMPTY 7: RCA SHIELD 8: RCA SHIELDThe CORRECT connector pin out for a 2006 Focus w/ Audiphile Stereo Package is as follows. (as modified in the image)1234 1: POWER 2: GROUND 3: RCA+ 4: RCA-5678 5: EMPTY 6: EMPTY 7: EMPTY 8: EMPTY

works