How to Wire a P2 Brake Controller to a 2015 Chevy Express Van Trailer Wiring Bundle Under Dash

Question

Question:

We xhanged tow vechiles and want to move the P2 from our old tow vechile that had a plug in under the dash for the xontroller to the new van. However the van doesnt have the plug it has 4 wires taped behind the floor board. It has factory wurung for a 7- pin conntor to the rear. What I need is which wires from the controller go to which wires on the van. Van has labeling on the wires with GND, BATT FU, TRL FD AUX CIR, AND FD CHMSL. Is it possible to tell me which of the brake controller wires go to each of the van wiries. Because even the labeling on the wiring makes no sense to me except for GND

asked by: Scott H

0

Expert Reply:

White of your P2 brake controller # 90885 would go to GND or ground like you determined.

FD CHMSL is the stoplight switch circuit so the red wire of the controller runs to that.

TRL FD AUX is for the blue wire of the controller.

BATT FU is for the black wire of the controller.

expert reply by: Jameson C

0

Answer 1

If your 2019 Chevy Express Van 3500 has the tow package there will be a round connector taped behind the rear bumper that a 7-way like the part #A10-7072VP could attach to. Otherwise you'd need to install a 4-way first like the part #118392.

view full answer...

Answer 2

Yes, the circuits you found for installing the P3 part #90195 that you referenced in your 2016 Chevy Express Van are correct. The CHMSL circuit stands for center high mount signal lamp and is a dedicated brake light circuit and runs to the red wire…

view full answer...

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…

view full answer...

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…

view full answer...

Answer 5

It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…

view full answer...

Answer 6

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part #C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give…

view full answer...

Answer 7

That's a very good question, we tend to be extra cautious and say to use 10 gauge wire because that would be more than enough. When you get into longer trailers that will end up using a lot of wire the heavier gauge wire becomes more necessary.…

view full answer...

Answer 8

Since wire color codes are NOT universal, we always recommend wiring by function, rather than wire color. If you look at the Trailer Wiring FAQ article I have linked you to, you can see some diagrams showing the proper way to wire a vehicle and…

view full answer...

Answer 9

I have a solution for you but the Reese Weight Distribution w/out Shank #RP66021 that you referenced won't work well for you due to how tall your frame is. So what you'll need to do is install an under slung coupler on your trailer like the…

view full answer...

Answer 10

Transmission coolers make a huge difference in the longevity of a vehicle transmission. Basically the biggest one you can fit will give you the best performance. For your 2019 Chevy Express Van I recommend the Derale cooler part #D13504 which…

view full answer...

Answer 11

Thank you for all of the information and pictures! It looks like you should at least have some wiring already run on your 2019 Chevy Express Van 3500 so I'm just as confused as to why you don't have a round plug with a cap inside the…

view full answer...

Answer 12

The best way to pick out a weight distribution system is to base it off of the loaded tongue weight of the setup when it is loaded and ready to tow. This figure also includes the weight of any cargo behind the rear axle of the tow vehicle. I attached…

view full answer...

How to Wire a P2 Brake Controller to a 2015 Chevy Express Van Trailer Wiring Bundle Under Dash

Continue Researching