Help With Parts Needed To Flat Tow a 2015 Fiat 500
Updated 01/27/2026 | Published 01/02/2026
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Question:
Hello, I am looking for the correct products to flat tow my 2015 Fiat 500 sport behind my 2019 Holiday Rambler Admeral RV. Can you suggest with part numbers which products I need to purchase please? This will need to include the wiring harness that allows charging from the RV to the car if I am correct. Thank you
asked by: Shane F
Expert Reply:
Hey, Shane! Happy to help
I'm going to assume that this is a manual transmission? If not let me know because you will need completely different parts! Below is a full list of parts that you will need to be able to safely flat tow your 2015 Fiat 500.
Roadmaster Crossbar-Style Base Plate Kit - Removable Arms part # 522013-1A
Roadmaster Falcon 3HD Tow Bar part # RM27NQ
Replacement Quick Disconnect Crossbar Assembly for Roadmaster Tow Bars part # 910021-00
Roadmaster 4-Diode Universal Wiring Kit - 7-Way to 6-Way Coiled Adapter Cord part # RM-15267
Roadmaster Battery Charge Line Kit for Towed Vehicles part # RM-156-25
Demco Stay-IN-Play Duo Braking System for RVs w/ Hydraulic Brakes - Wireless Monitor - Part # DM86VR
Roadmaster Stop Light Switch Kit part # RM-751455
Safety Cable Extensions part # RM27DQ
Blue Ox Adjustable Drop Hitch Receiver Adapter - 2" Hitches - 8" Rise/Drop part # BLU28XR
The last part is the best one I could recommend based off what I could fine. Your tow bar once mounted needs to be within 3" from level. The baseplate on your Fiat will be 16.5" off the ground so the Blue Ox adjustable adapter should be more than enough to get you within that 3". The extensions are needed when using the high low adapter since it will be adding in the length between the RV hitch and the front of the Fiat.
Let me know if you have any questions about these parts, you can ask this by replying below. Is this going to be your first flat tow set up or have you flat towed before?
(click to enlarge)
Product Page this Question was Asked From
Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Coiled Adapter Cord
- Flat Tow Wiring Harness
- Splices into Vehicle Wiring
- Diode Kit
- Universal Fit
- 7 Blade to 6 Round
- Roadmaster
more information >
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on Flat Tow Wiring Harness
Gwendolyn Y.
1/27/2026
Hey Shane, how did your flat tow setup for the Fiat 500 work out with the Roadmaster wiring kit and charge line? Your results could really help others planning a similar setup with their RV. Sharing what worked best might guide the next person through the process.