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

My only complaint about this product is not about the product as much as about the marketing. I entered my vehicle information (2005 Mercury Moutaineer) and a message popped up verifying that this item IS compatible with my OEM wiring. After I got it home and tried to plug it into my wiring, it didn't fit at all! Ended up going to a big-box store to get the part that fit. BTW, Mercury Moutaineer is the same as a Ford Exploder. Could have been my fault due to wiring ignorance, but I don't think so. New part fit and radio installed perfectly.

Just bought a ‘04 Lincoln Town Car and didn’t know wether it had an amp/sub or not(couldn’t speak with original owner as it was purchased through a family member and the manual was missing) so I went with this harness because if I didn’t need the amp out harness no big deal, but if I did...well then I’d need it lol. The harness itself is perfect for what it is, a simple harness to prevent cutting and splicing the OEM harness, wires were clearly marked and colors matched the harness for the after market stereo. Went with the Pioneer AVH-X490BS, if you get a pioneer look into getting the parking brake bypass switch.The only problem is that there was nowhere to connect the two blue wires on the harness with the RCA plugs, so I assumed I didn’t need it and just didn’t use it. Reconnected negative terminal on battery and tested radio and it worked great so I figured I was right. I go to install the Infinity Kappa speakers in the rear deck(btw if you have a Town Car be ready to take out the entire rear seat, both bottom and rear cushions to get access to the speakers......) and guess what I see?? A sub and amp.... I was planning on getting an amp for the speakers anyways, and maybe a 8” sub just for a little bass so I’ll just wait to get them rather than hook up the factory amp/sub.If you're replacing a radio you can’t go wrong with Metra, always quality products. Been using them as long as I can remember, and between work, my personal vehicles and friends/family I’ve installed more car stereos and speakers than I can remember and never had an issue with Metra.

Great product. I've had my new deck installed successfully with this product since Jan 2016, but my steering wheel controls did not work. Be aware that this harness doesn't have pins/wires in every hole. For my Ford, you need Pin 18 to install the ASCW-1 unit into. I ended up not using my ASWC-1 from Jan-May, and I finally decided to get it going again. Since I did not want to harm any factory wires in any way (Metra suggested cutting insulation back on the factory wire and taping the SWC wire to it), I opted to buy a second harness, and remove a pin and wire from it to install into my existing harness. For $5 more, it's not a bad option but Metra really should include an additional wire or two with it for folks with Steering Wheel Controls. There's a Youtube video about it, but it's a lot easier than it looks. You remove the red piece inside the harness, push the tan plastic down under the pin, and that frees it. Then you take the your actual harness, locate the needed pin slot (18 in my case, 20 was marked so it was easy to find) and just push it right in until it clicks. I really wish I would I would have read about this before starting my install. This method will give you a wire to solder or connect your steering wheel control module to. For Ford, it's the green/white wire. I'm the sorta person who will spend way more time and money to do a job the right way, so that's why I bought two. I really hope this helps! Enjoy!