Installing Third Brake Light and Dome Light into Truck Bed Cap

Question

Question:

Best way to hook up the brake and interier lights on truck cap. Truck 2001 Silverado 3/4 HD reg. bed w/ trailering package. 7 way connector,light blue wire out of wire harness by plug is caped off ? Thank You

asked by: Warren

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Expert Reply:

If you will take a look at the wiring harness up above the spare tire, you should find the connector that the 7-way plugs into. If you trace the loom back just a bit, you will find a light blue wire that is used for the 3rd brake light for your truck cap. If you will follow the provided link, see Step 3 figure B. This photo will show you the location of this wiring harness above the spare tire.

For the interior dome light, there are two common methods both of which will require a switch, such as part # PK34513. You can either tap the feed for that dome light into the tail light circuit, which means that the light will only work when the running lights or headlights of the vehicle are switched on, or it can be tapped into the 12-volt feed that runs to the 7-way. I would recommend using that 12-volt feed, so that you will not need to turn on the head lights to activate the circuit.

expert reply by: Mike L

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Answer 1

Like you said, most trailers in the US have what is called a 2-wire or combined system with the turn signals and brake lights on the same circuit. You would not tap into the tow package wiring if you need just a brake light signal. There is a…

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Answer 2

Yes, you can use the factory trailer connector on your 2015 Nissan Titan to power the third brake light on your Leer camper shell. That said, they don't make a plug and play harness for this so you will need to do some wiring but no splicing into…

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Answer 3

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 4

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 5

Yes, we do. To add a hitch to your 2024 Toyota Grand Highlander, I recommend the Curt Trailer Hitch item #C26VV. This hitch is custom fit and bolts to your Toyota with included hardware. This is a class III hitch with a 2" receiver. It has a…

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Answer 6

To add a hitch to your 2024 Toyota RAV4, I recommend the etrailer item #e23ZR. This hitch is custom fit and bolts to your Toyota with included hardware. This is a class III hitch with a 2" receiver. It has a 4,000 lbs towing capacity, and a 600…

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Answer 7

Yep, so long as your 2024 Subaru Crosstrek Wilderness is not a hybrid both the Curt and etrailer hitches will fit: - Curt Trailer Hitch Receiver #C13382 - etrailer Trailer Hitch Receiver #e98912 The only difference besides price is the finish; the…

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Answer 8

As far as wiring for the 2024 Toyota Grand Highlander, we do have the Curt #C59236 available which is more of a universal hardwire harness. Unfortunately there are not any plug-and-play options that have been confirmed to fit as of yet (October 4,…

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Answer 9

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

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Answer 10

Class I and Class II hitches both have a 1-1/4 inch receiver opening. The difference is that a Class I hitch has a lower tongue weight rating, usually 200 pounds and a lower towing rating, usually 2,000 pounds. A Class II hitch usually has a tongue…

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Answer 11

To add a class III hitch to your 2024 Honda CR-V hybrid, I recommend the Curt Trailer Hitch item #C13397. This hitch is custom fit and bolts to your CR-V with included hardware. It is a class III hitch with a 2" receiver. I really like this…

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Answer 12

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Installing Third Brake Light and Dome Light into Truck Bed Cap

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