Adding a Trailer Wiring Harness to a 1991 Ford E-350 Ambulance with Separate Wiring
Question:
I have a 91 E-350 Ambulance tow vehicle. Turn signals are separate. Tail lights and brake lights use a dual filament bulb. What do I need to wire to 7-pin or 4-pin connector?
asked by: David M
Expert Reply:
To install a 4-way trailer connector I recommend using the universal wiring harness # 119250KIT. It will combine the separate wiring on your 1991 Ford E-350 Ambulance.
Then use our # ETBC7 kit to convert the 4-way to a 7-way. This kit includes everything for a fully functioning 7-way, as well as the wiring to install a brake controller if you need one.
If you do need a brake controller I recommend the Prodigy P3 # 90195. It's one of our top controllers because of the easy-to-use LCD screen.
Products Referenced in This Question
Tekonsha Prodigy P3 Trailer Brake Controller - 1 to 4 Axles - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Electric over Hydraulic
- Automatic Leveling
- Under-Dash Box
- Dash Mount
- Up to 4 Axles
- LCD Display
- Up to 360 Degrees
- Tekonsha
more information >
Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Accessories and Parts
- Trailer Brake Controller
- Installation Kits
- etrailer
more information >
Product Page this Question was Asked From
ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Converter
- Universal Fit
- 4 Flat
- Tekonsha
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: How to Choose the Right Trailer Hitch Class
- Article: Trailer Wiring Diagrams
- Article: How to Measure for Trailer Hitch Drop
- Article: Brake Controller Installation: Starting from Scratch
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Article: My Trailer Hitch Doesn't Fit
- Q&A: 2023 Volvo XC60 Hidden Hitch and Trailer Wiring Recommendations
- Q&A: Should Tekonsha P3 be Recalibrated with Trailer Fully Loaded
- Q&A: Converting a Semi 7-Way Trailer Connector to an RV 7-Way Trailer Connector
- Q&A: Parts Needed To Install A Brake Controller On A 2023 Freightliner Cascadia
- Q&A: Troubleshooting Trailer Running Lights Staying On when Vehicle is Turned Off
- Q&A: What Does E6 Furrion Thermostat Indicate
- Article: Routing the Power Wire for a Trailer Wiring Harness