Troubleshooting Trailer Llights for 2004 Toyota Tundra

Updated 05/26/2020 | Published 05/22/2020

Products Featured in This Question

Hopkins Plug-In Simple Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Flat Connectors

(234)

$37.49

Replacement Multi-Plug 7-Way and 4 Pole Trailer Connector

(112)

$55.58

Hopkins Endurance Multi-Tow Trailer Connector Adapter - 7-Way to 6-Way, 5-Way or 4-Way

(192)

$31.02

LCD Digital Circuit Tester

(26)

$26.67

Question:

we have the 7 way connector on the truck what do we need to hook up trailer lights? trailer lights 2004 toyota tundra

asked by: GLORIA S

Expert Reply:

If you already have a 7-way connector on your 2004 Tundra, then you would simply plug in the trailer. If you have the 7-way and the trailer is a different compatibility, you can use adapter # HM47570.

If you have the factory connections but are missing the trailer connector, then you would use the Hopkins Plug-In Simple Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Flat Connectors # HM43385 or the Replacement Multi-Plug 7-Way and 4 Pole Trailer Connector # 20137. Both of these options connect the same way, so it comes down to your preference for look.

If you have the connector but your trailer lights don't function properly, I recommend using a circuit tester like # PTW2992 to test each function on the vehicle side first and then the trailer side. If you have issues let me know what the problem is and we can troubleshoot that specific function.