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PAC Auxiliary Input Adapter for Ford

Add two auxiliary inputs to select 2005-up Ford, Lincoln, Mazda, or Mercury vehicles

Item #: 541ISFD531

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9 Reviews | 4 questions - 4 answers

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Add two sources to your Ford factory radio

This adapter allows you to connect two auxiliary audio sources directly to the factory radio on select 2005-up Ford, Lincoln, Mazda, and Mercury vehicles. With an RCA input and a 3.5mm minijack, you'll enjoy access to a wide variety of portable entertainment options on the road, including MP3 players, portable DVD players, handheld GPS, laptop computers, and gaming systems. The direct connection to your stereo means you'll also enjoy great sound.

Note: Your vehicle's radio must be equipped with (or be able to support) satellite radio. Non-navigation radios must have an "AUX," "Sirius", or "SAT" button to be compatible with this adapter. The adapter will NOT work with 2009 Ford, Lincoln, Mazda, or Mercury vehicles equipped with navigation or 2009-up vehicles equipped with Ford's internal satellite radio tuner. Please enter your vehicle information or call an Advisor at 1-888-955-6000 to find out if this adapter is compatible with your vehicle.

Product Highlights:

  • add two auxiliary inputs to the factory radio in select Ford/Lincoln/Mercury models
  • features both 3.5mm and RCA connections
  • warranty: 1 year
  • Our 60-day money-back guarantee

PAC Auxiliary Input Adapter for Ford Reviews

Average Customer Review:

9 Reviews

PAC Auxiliary Input Adapter for Ford

Written by: N5EXY from Texas on January 12, 2016

2006 Ford F-150
Crutchfield Customer Review (What's this?)

Easy to install.


Cons: I only need one aux input. I might find a use for the second one over time.

Works great

Written by: Matt from California on December 27, 2015

2005 Ford F-150
Crutchfield Customer Review (What's this?)

This adapter works as it should. I can't speak for longevity, as I've only had it for 2 weeks, but so far I love it. Adding 2 aux inputs was great on my truck; the first one is my Bluetooth adapter so I can stream from my phone, and I installed a headphone jack to drive the 2nd input of passengers want to DJ our trip. Works great!

Pros: Good audio quality, easy to install, provides 2 isolated inputs.

Cons: The included mass pin cable to radio needed some help, I had a loose wire that made me lose the tweeter on the driver door. Simple fix, though. Also, when the radio is actually powered off and you hit the Aux button, it says "No Aux Audio Connected". You have to turn the radio on and THEN hit the Aux button. Weird little bug but not a problem by any means.

PAC Auxiliary

Written by: Scott. from Lebanon tn. on July 17, 2015

Crutchfield Customer Review (What's this?)

It does what it says. However, I've had it for about 3 weeks. The other day, I had it locked up on me once. The AUX stopped working, the radio just came on. Then I lost all sound. After i stopped and the car sat for about an hour, I came back and it corrected itself. I'm worried about what's going to happen next.

Pros: Easy install.

Cons: Volume of AUX is not as loud as radio or CD. Unsure of reliability.

Crutchfield response on July 21, 2015 After the customer contacted our Tech Support team, they determined this piece was defective. They helped him return it and immediately sent a replacement to him.

Problems with.PAC Aux input adaptor

Written by: James from Garfield Hts Ohio on April 5, 2015

Since i purchased the PAC aux input from You. It has been trouble. Everything from installing. In which the way the Aux cables plug in and when trying to hide in the dash keep coming unplugged with relative ease during installation which is annoying. Instead of screw Collar type connectors that won't come undone. And as of tonight unit just stopped working all together. Now have to pull radio out of dash to see if unit is bad. Or output cables once again came unplugged. Would not buy this again. Very unhappy with this Junk PAC unit.

Pros: Cheaper than buying a head unit. Installs easily with provided vehicle specific harness.

Cons: Horrible connectors for the Aux outputs that just push in and come unplugged very easy instead of locking in. Bad design.

Crutchfield response on May 6, 2015 We forwarded this review to our Technical Support team for follow-up. Lifetime tech support comes with every Crutchfield purchase.

Love it

Written by: F150 from Moab utah on February 22, 2015

Crutchfield Customer Review (What's this?)

Great easy hook up. Worked in minutes. Love it

Pros: Easy to hook up. Long cable makes it easy to hook into iPod or portable DVD.



Written by: John from Jackson, MI on June 22, 2014

2006 Ford Fusion
Crutchfield Customer Review (What's this?)

Love it I can't believe I waited so long to get this. It was extremely easy to hook up to my factory radio. It even came with two connectors so I could connect to different devices. I ran a cable to the backseat in case my kids wanted to use it to do something. I have one upfront. Cables are extremely long give you plenty it. Plugs right into your headphone jack of your phone. Even allow my phone to do hands-free calling.

Pros: Works well, very easy to install. It's basic and he does what you needed to do. You cannot beat the price!

Cons: Only drawback is it's pretty basic. Your control is the phone but can use Siri .

best thing since sliced bread

Written by: Todd from Ottawa, OH on July 23, 2013

2007 Ford Freestyle
Crutchfield Customer Review (What's this?)

Excellent product, extremely easy hook up to the factory unit. The sirius/xm works marvelous compared to using an fm modulator.

Pros: Easy installation

Cons: It would be nice if the usb port came with a wire as well. Not a deal breaker though.

PAC Auxiliary Input Adapter for Ford

Written by: JR from Lufkin, TX on June 26, 2013

2004 Ford F-150
Crutchfield Customer Review (What's this?)

It was enough to put it, but did not work. Tried to contact the manufacturer and tried to provide assistance on changing the switches, but to no avail. Decided to return instead.

Pros: Too bad it did not come with a standard USB plug in. Trying to find an adapter was tough, so recommend ordering the conversion cable from mini USB male to standard USB female, so I could plug a standard USB into it. I wanted to be able to plug my iPhone into the radio through the interface.


Great Alternative to replacing a receiver

Written by: Alec J from Minneapolis, MN on June 21, 2013

2006 Ford Explorer
Crutchfield Customer Review (What's this?)

Very happy with this adapter. I have a 2006 Explorer and the receiver didn't come with an AUX in. This product is a great alternative if you are happy with your current receiver, but simply want an AUX port. Great sound quality, fairly easy to install by yourself. Do not pay $50 to Best Buy, I have no experience installing audio equipment and this only took me about 45 minutes with a plastic knife and 7mm wrench.

*If you are having trouble fitting your receiver back into the dash, strategically place all the new harness and wiring along the back of the receiver and secure it using duct tape. - I had this problem and was the only frustrating part of the whole process.

Would recommend to anyone who doesnt want to drop $150 plus installation on a new receiver and installation kit.

Pros: Fairly easy to install, great sound, reasonable price

Cons: The only complaint I have is that the "master instructions" are only vehicle-specific in the way that they do not explain how to actually install the adapter; just how to remove the receiver. This should be specified. I would recommend using a youtube tutorial for installation.

Hands-on research

What's in the box?

Download owner's manual

  • Dual aux input interface module
  • T-harness (PGHFD1)
  • Two 6.75' audio cables (w/ a proprietary connector on one end and stereo RCA jacks/3.5mm minijack on other end)
  • Owner's Manual
  • Quick Start Guide

Product Research


Overview: The iSimple DuaLink (ISFD531) is a dual auxiliary audio input interface for select Ford, Lincoln, Mercury, and Mazda vehicles. The ISFD531 allows you to integrate two auxiliary audio sources with your factory radio. Ideal for connecting portable devices such as a smartphone, MP3 player, tablet, laptop, etc..

Dual Aux Inputs: The ISFD532 interface provides two auxiliary audio inputs. The interface module is fitted with two proprietary 8-pin ports which are used to connect the two included 6.75' audio cables. Each audio cable is fitted with a male proprietary connector on one end that plugs into the interface module, plus female stereo RCA jacks and a male 3.5mm connector on the other end to connect your portable audio device.

Vehicle Compatibility: The iSimple DuaLink (ISFD531) is compatible with the following Ford, Lincoln, Mercury, and Mazda vehicles. The vehicle's factory radio must either be equipped or have the ability to support Satellite Radio.

Make Model  Year
Ford Edge 2007-2009
Escape (+hybrid) 2008-2009
Expedition 2007-2010
Explorer 2006-2010
Explorer Sport Trac 2007-2010
F-150 2005-2008
F-250/350/450 2008-2011
Five Hundred 2006-2007
Focus 2006-2009
Freestyle 2006-2007
Fusion 2005-2009
Mustang 2007-2009
Taurus (+x) 2008
Lincoln Mark LT 2006-2008
MKX 2007-2009
Navigator 2007-2008
Zephyr 2005-2006
Mercury Mariner (+hybrid) 2008-2009
Milan 2006-2009
Montego 2006-2007
Mountaineer 2008-2010
Sable 2008-2009
Mazda Tribute 2008-2011


  • Non-navigation factory radios must have an "AUX", "SIRIUS", or "SAT" button to be compatible.
  • 2009 Ford/Lincoln/Mercury vehicles equipped with factory navigation are not compatible.
  • These 2009 vehicles will not be able to support the ISFD531 if the factory radio has an internal Satellite Radio tuner - Ford Escape, Ford Focus, and Mercury Mariner.

T-Harness: The iSimple DuaLink (ISFD531) includes a T-harness which connects between the dual auxiliary input interface module, your vehicle's factory radio, and your vehicle's factory wiring harness.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Customer Q&A

4 questions already asked

If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through the settings on the product and see if there may be a fix. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer. You can also post your question in our forums: Or try our online support center: [ Kenny  Feb 04, 2016 ]  Staff
A) No, the USB port is not for the connection of devices. It's provided for service and firmware updates by the manufacturer. B), Yes, we do offer a mountable 3.5mm Female input and extension cable that terminates in the stereo male RCA ends by Clarion. It's commonly used in Marine applications but you can certainly use it in your vehicle: I hope that helps! [ Ryan  Nov 18, 2015 ]  Staff
For details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle. [ Krissy  Oct 23, 2014 ]  Staff
You will want to contact an Advisor by phone or online chat to discuss compatibility with your factory system. They will be able to pull up your vehicle and see if this will integrate. If it does not, then they will also be able to discuss other options with you. [ Jeff  Dec 30, 2013 ]  Staff

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