Replacement 7-Way and 4-Way Trailer Connector for a 2007 Toyota Tundra

Updated 02/01/2013 | Published 01/31/2013

Question:

Hello, Is this the correct part to replace the 4 wire and 7 wire factory one that is broken? Thanks

asked by: Ed

Expert Reply:

We do have a replacement 7-way and 4-way trailer connector for the 2007 Toyota Tundra, but before we can determine which harness will work for your truck, we will need to know what type of plugs your trucks tow package wiring requires and how the connectors are wired.

Unfortunately, Toyota decided to wire this truck a number of different ways. The Tundra had a generation change between 2006 and 2007 and this caused some discrepancies in the wiring. Your factory 4-way and 7-way trailer connector should have two plugs on the end that connect to plugs on the vehicle (see photo). There are two ways that these connectors may be pinned. One way is having one 3-pin plug and one 4-pin plug and the other way is having one 2-pin plug and one 5-pin plug.

If you have a 2-pin plug and a 5-pin plug, then you will need the connector that you referenced, # HM11143395.

If you have a 3-pin plug and a 4-pin plug, then you will need either the Hopkins Connector, # HM43385, or the Tow Ready Connector, # 20137, depending on how the plugs are pinned. I recommend using a circuit tester like our Quickee Circuit Tester, # 3808, to test each pin on the 3-pin plug for their function. The location of the 12 volt power pin and the reverse light pin will be the determining factor (see photo).

You will also want to make sure that both of your plugs are female ends. The plugs that come on each of our 4-way and 7-way connectors for your truck have male ends. If one of your plugs has a male end, you can still use these harnesses, but the corresponding male ends will need to be cut off and the wires will have to be spliced together.

expert reply by: John H