Is 2003 Lexus GX470 Pre-Wired for Trailer Connector
Question:
Hi! How can I find out if I have a 4 way or 7 way connector for my GX470 2003. I just bought the Drawtite hitch from you. Please take a look at my photo of the existing connectors. Thanks
asked by: Thomas W
Expert Reply:
Given the connectors shown in the photo, although your 2003 Lexus GX470 wasn't equipped with the factory 7-way trailer connector, it looks like it's pre-wired for one. The connectors shown match up perfectly with the # HM43374 7-way trailer connector for the 2003 Lexus GX470.
You'll want to use a circuit tester like # PTW2993 on the pins of the 2 connectors you found to see if they're active. I've provided a photo showing how they're pinned out; your connectors will be a mirror image of the provided pinout photo. With the ignition on, you should see power on the 12-v pin, and power on the taillight/turn signal/brake lamp pins as each function is activated. If not, you'll need to check the fuse box to ensure the fuses for those functions are installed. If they aren't, you'll need to install them to activate them.
Luckily enough, I was able to find a .pdf copy of the owner's manual online, which isn't typical of older vehicles and was able to find the location and rating of the tow package fuses:
• Location 7, 30A Fuse- Power to Brake Controller
• Location 9, 30A Fuse- 12-V Feed to Trailer
• Location 10, 40A Fuse-Trailer Lamps
• Location 42, 30A Fuse-Trailer Taillight Converter
Once the fuses are in place and the # HM43374 is installed, you should be good to go. If the trailer you'll tow has brakes, you'll need to install a brake controller. I'd recommend a proportional controller like the Tekonsha Primus, part # TK90160. You'll also need the brake controller harness, part # 3040-P. The connector under the dash that the # 3040-P plugs into should be located above the e-brake pedal, just above the kick panel.
(click to enlarge)
Products Referenced in This Question
Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers - Toyota and Lexus
- Accessories and Parts
- Trailer Brake Controller
- Wiring Adapter
- Plugs into Brake Controller
- Vehicle Specific
- Tekonsha
more information >
Hopkins Plug-In Simple Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Flat Connectors
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- No Converter
- Custom Fit
- 7 Round - Blade
- 4 Flat
- Hopkins
more information >
Tekonsha Primus IQ Trailer Brake Controller - 1 to 3 Axles - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Automatic Leveling
- Under-Dash Box
- Dash Mount
- Up to 3 Axles
- LED Display
- Up to 90 Degrees
- Tekonsha
more information >
Product Page this Question was Asked From
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Converter
- Custom Fit
- 4 Flat
- Tekonsha
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Trailer Wiring
- Shop: Hopkins Plug-In Simple Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Flat Connectors
- Shop: Brake Controller
- Shop: Universal Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers
- Shop: Replacement Multi-Plug 7-Way and 4 Pole Trailer Connector
- Shop: Curt Powered Tail Light Converter w/ 4-Way Flat Trailer Connector and Install Kit
- Shop: Redarc Tow-Pro Liberty Brake Controller - Dash Knob - 1 to 2 Axles - Proportional
- Video: Hopkins Custom Fit Vehicle Wiring - Trailer Hitch Wiring - HM43374 Review
- Q&A: Trailer Wiring Recommendation for 2007 Toyota 4Runner that Has Two Connectors
- Search Results: tk90160
- Shop: Suspension Enhancement
- Q&A: Mounting the Replacement Wiring Harness For Factory 7-Way On a 2008 Toyota 4Runner
- Q&A: Is Trailer Connector On Hopkins Plug-In Simple Wiring Harness for 2007 Lexus GX 470 Removeable
- Video: Flex-a-lite Radiator Fans - Electric Fans - FLX180 Review
- Shop: Radiator Fan
- Shop: Curt Replacement OEM USCAR Trailer Connector - Dual Connection - 7-Way RV Style and 4-Way Flat
- Shop: Pollak 7-Pole, RV-Style Trailer Connector Socket w/ Wiring Harness and Mounting Bracket
- Q&A: 7-Way and Brake Controller Recommendation for 2003 Lexus GX 470
- Q&A: Trailer Connector for 2004 Lexus GX 470 with Factory 7-Way
- Q&A: Will Hopkins Harness HM43374 Fit 2003 Lexus GX 470 With 2 Female Plugs
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: Trailer Hitch
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Video: Choosing the Right Trailer Wiring
- Search Results: trailer brake controller
- Article: Trailer Wiring Diagrams
- Video: Choosing the Right Brake Controller
- Search Results: brake controller
- Article: How to Choose the Right Trailer Hitch Class
- Video: Redarc Tow-Pro Liberty Brake Controller Review RED24FR
on Custom Fit Vehicle Wiring
