Adding a Connector on a 2004 Chevy Express to Plug In Wiring Harness # 41155

Updated 07/20/2018 | Published 07/19/2018

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Question:

If i'm going through this much should i just go ahead a wire up a 7 and 4 pole plug setup on the van? If so what does that change on my wiring connections from my cut wires to the replacement plug?

asked by: Ed K

Expert Reply:

You could wire in harness # PK11998 to those factory wires on your 2004 Chevy Express. If you are only needing a 4-Way connector such as # 41155 then you would not use the blue, black, or yellow wires from PK11998 and can tape them up and tuck them out of the way.

The wires on your van will need to be tested with a circuit tester such as # ALL640595 or a meter if you have one. You cannot go by wire color since there isn't exactly a standard that everyone goes by.

On the PK11998 harness the red wire is left turn signal and brake lights, white is ground, green is right turn and brake lights, and brown is for the running lights.

expert reply by: Michael H

click to enlarge

7/19/2018

If i'm going through this much should i just go ahead a wire up a 7 and 4 pole plug setup on the van? If so what does that change on my wiring connections from my cut wires to the replacement plug?

Michael H.

7/20/2018

You can still use the same harness, # PK11998, except that you would need to wire in those additional wires to have those functions. On the PK11998 harness the blue wire is output from a brake controller, such as # 90885, to the trailer brakes. Black is the 12 volt hot lead. And yellow is for reverse lights. If your trailer only requires lights and not these 3 other functions then you still don't have to wire them in. Once you have the PK11998 wired in you can plug it into the back of 4- and 7-Way connector # HM40975. And if you choose to add a brake controller and 12 volt hot lead then you can use wiring kit # 5506 to complete the install. You can use left over wire from the 5506 kit to tap into a reverse light wire on the van to connect to that yellow wire on the PK11998 harness. I have included some links that will help. Not all of the information applies to your van so just follow the parts that do apply and you'll be good to go.