Scosche FGA Floating Ground Adapter
1985 Ford F Series
Crutchfield Customer Review (What's this?)
Worked perfectly easy hookup
Pros: Great part
Our experts help you pick the ideal gear for your needs.Meet our advisors
Free tech support for the life of your gear.Read about our one-on-one expert help
You may return items that are complete and like new for any reason within 60 days.See the details of our return policy
Earn one point for every dollar you spend and use those points to save on future purchases.Get full details on Crutchfield Rewards
We offer vehicle-specific installation instructions, dash kits, wiring harnesses, and speaker accessories at deeply discounted prices with car stereo and speaker purchases. Available for most vehicles.Learn more
Our customers have trusted us with their business, and they’ve helped us win awards for our service.Check out our most recent awards
The manufacturer’s warranty always applies.See more details
You'd like to install a new stereo in your older vehicle, but your factory system was designed for a low-power radio with speakers that share a negative ground connection. Scosche's FGA floating ground adapter compensates for this setup, allowing you to connect your new stereo safely. You'll also enjoy your new stereo's higher power. Warranty: 1 year
Note: Most vehicles will require additional installation parts please identify your vehicle if you haven’t done so. You can also call an Advisor for more information.
Average Customer Review(s):
Worked perfectly easy hookup
Pros: Great part
Works great. Needed to put mOdern radio in 83 Lincoln Mark. Directions are nOt to useful thOugh, only front run through the adapter, rears are wired conventionally or they won't . Ford had weird floating ground on fronts Only.
Pros: Wos good
An essential component of having a contemporary sound system in a vehicle 39 years old.
Pros: Ease of installation
Bought the FGA to correct an odd wiring design in my Vanagon in which the two rear speakers share a common ground, which made the receiver distort and anything above moderate listening levels. I used this device to put all four speakers and the receiver chassis on the same (chassis) ground, and to my amazement this corrected the problem and allowed the receiver to put out full power without distortion.
Pros: Does what it is supposed to do, when used 'intelligently' (some knowledge of electronics is helpful!).
Cons: Instruction sheet is of little use.
Does just what its supposed to do.
Pros: Small, easy to use
This was installed in my 1986 Mustang GT. My factory speakers were ground to the doors, so I needed this in order to complete my wiring harness, plus having a second ground is nice.
Pros: Easy to install, compact
Cons: Nothing at all
I thought Crutchfield was pulling a fast one when they automatically added this to my cart when I was ordering a stereo and speakers for my 32 year old Ford Mustang...boy was I wrong!! I needed it and the only thing I accomplished by removing it from my cart was delaying the completion of my stereo install project by 4 days. Stupid me, I won't make that mistake again. Unit is installed and now works 100%. Thank you Crutchfield, you guys do know what is best.
Pros: Makes modern stereo systems work in older Fords.
Cons: My stupidity of removing it from the cart from the cart on the initial order, ended up having to order it anyway.
This is one of the most interesting unknown products to me that I never new existed but I'm glad I found out what it is because I wouldn't have a brand new radio in my truck without it.
Pros: I now how a modern radio in my classic ford thanks to this little guy
Cons: Extremely difficult to instal I had no idea what to do with the thing took forever to figure out what to do with it
The people at Crutchfield are top notch, they certainly go above and beyond, I was ultimately frustrated with my audio project, a German made 1990 BMW 735i with a wiring harness that cannot be matched up for easy install as there is no Metra harness made for that car, and to make matters worse it is a common ground speaker system and the new aftermarket stereo's do not work with the older active amplifiers without modification (passive amps work differently). I was getting sound only out of 1 speaker (I have 10) the "floating ground adapter" allowed my factory amp to work and use all 10 speakers. They had the answer and I have great sound... the folks at Crutchfield Rock!
Pros: Great service, great products, super fast shipping
Cons: I didn't call them sooner!
I really dont know if this product works or not because it did not work with my application
Pros: Easy to install.
Cons: It didnt work for my application. I have the square plug. After I hooked up the floating gound adapter the final step in the instructions stated that if this vehicle had the square plug than the ground adapter would not work.Crutchfield response on 4/27/2015 We forwarded this review to our Technical Support team for follow-up. Lifetime tech support comes with every Crutchfield purchase.
This adaptor was exactly what I needed to get the best posssible sound out of my new stereo , and worked awesome ! I had an ungrounded speaker system in an older motor home and could not have been more happy with a product doing exactly what i wanted .
Pros: This product worked great ! I was unable to find it anywhere else .Thank goodness for the expert advice and info to try this adaptor .
Cons: Non , so far , it is working great .
Great, easy, and cheap way to attach newer stereos to older floating ground systems.
Pros: Good instructions, easy to connect. cheap
Fantastic sound. Not really clear on what constitutes the need for this addition, but it works perfectly.
Pros: Works great. No issues.
Cons: A bit confusing as to why it is needed. And why only one speaker is to be connected to the exiting negative? Regardless, it functions perfectly
While restoring a BMW E30, I was able to test the system with and without the adapter. The FGA works well and didn't seem to detract from the sound quality of my radio. It was useful by saving me the trouble of permanently rewiring the sound system to include separate grounds for each speaker output.
Pros: It works well.
Cons: 1) Poor documentation. 2) Implies that it is only for Ford systems. 3) The wiring color code was the opposite of my car's color code. That is the polarity of the solid and striped wires were opposite (same Color but, Stripe to Solid and Solid to Stripe). This made the job a bit tedious because I had to double check each connection and some were difficult to see the stripe on the wires through the dash cutout.
This floating ground adapter was just the thing I needed to finish the install of a new head unit in an old classic car (1980 Chrysler) with a common ground. It works flawlessly and made the install much faster and easier than running all new wiring through the car!!!
Pros: fast and easy to install and works well.
I used this for a new stereo in my BMW E30 with a common ground. It works flawlessly and made my install easy as could be.
Pros: Works perfectly in my E30 with a 6 speaker system.
Product works as advertized. Very easy to install.
This adaptor is required to connect any isolated-ground radio to any common-ground car without needing to run new speaker wiring to eliminate any common or chassis grounds. This applies to almost all 60's and 70's classic cars with the exception of the later Delco systems which are easily identified by their 3 piece blue, white and black connectors. It's not only needed for Ford cars as a customer "suggests"; it also applies to earlier GM of any model, Ford, Chrysler, AMC and any foreign cars that use a common negative ground system. The stock 300zx indeed uses a common ground system for the stereo. Sure, an isolated ground radio might "work" without the adaptor, but is very likely to overheat the output section, reduce the amount of available power and shorten its life. Crutchfield makes it extremely clear that "service after the sale" is just as important as the sale itself. I'm not affiliated with Crutchfield - just a car radio repair guy who is fed up with folks who cost us money through their lack of knowledge.
I have a common negative ground speaker system in a 1993 Winnebago. I changed the head unit and needed this to use existing speaker wires. Works well..
Pros: Works Great. Without it I could not use the negative common ground speaker system.
Was told I "needed" this product to connect my new stereo with the old 300ZX wiring. Wrong!! Waste of money. It is sitting on my desk as a paperweight. Not worth the effort to return an item that cost this much. Like I said, waste of money. Only needed if you own a Ford vehicle, so don't fall for the "any older vehicle" line.
Cons:Crutchfield response on 4/7/2014 This car's stereo system was probably rewired at some time in the past, which would explain why he didn't need this adapter. When we read Geoff's review, we promptly refunded him the charge for the item since it wasn't needed.
Floating Ground Adapter: The Scosche Floating Ground Adapter (FGAB) lets you install a high-power aftermarket stereo into many older 70s, 80s, 90s vehicles with a common ground or premium sound 5-wire speaker system.
Wire Code Chart:
|White||Left Front Speaker +|
|White/Black||Left Front Speaker -|
|Gray||Right Front Speaker +|
|Gray/Black||Right Front Speaker -|
|Green||Left Rear Speaker +|
|Green/Black||Left Rear Speaker -|
|Violet||Right Rear Speaker +|
|Violet/Black||Right Rear Speaker -|
Note: Please consult the Crutchfield Car Selector for your vehicle's compatibility.
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.
Recommended by your website [ Gary Oct 09, 2017 ]
Recommended. Probably won't end up using, but doesn't hurt to have. [ Michael Aug 08, 2017 ]
I've used SO speakers in my 1978 Ford E150 Van and I'm very happy with their performance. No need to break the bank as these speakers fit any budget while delivering much more than you'd expect for the price. They look nice too! [ Chris Jun 21, 2017 ]
It was part of the suggested/required items to allow the radio I purchased to work with the original speakers and wiring. [ Dave May 25, 2017 ]
Need [ Zachary May 23, 2017 ]
Your company makes it very easy to get all the necessary information [ steve May 12, 2017 ]
came with installation package [ knut Feb 22, 2017 ]
included [ Michael Jan 22, 2017 ]
Crutchfield recommendation [ Carlos Jan 04, 2017 ]
I have an older car and want to upgrade the sound system in it. This product makes the conversion with no altering of the factory wire harness [ John Dec 27, 2016 ]
It was recommended. [ George Nov 24, 2016 ]
Package deal [ Robert Oct 28, 2016 ]
Included in kit for free [ Charles P. Oct 10, 2016 ]
To go with the radio [ Carlos Aug 30, 2016 ]
It had great reviews. [ Steve Aug 28, 2016 ]
Old vehicles helps restrict feedback static with neg grounded vehicle [ Greg May 26, 2016 ]
Because I got help on Chat line with Crutchfield representative [ Rod Mar 05, 2016 ]