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Opt7 Lightbar with Easy Connect Harness Issues

Nick McDermott
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Nick McDermott Enthusiast

Nick McDermott

Posted
Posted (edited)

Hey guys, 

 

Have any of you tried out this lightbar from Amazon? I purchased the triple led 60" bar with the 7 to 4 easy connect harness that connects into the trailer adaptor but nothing is working...My only thought is that i havent tapped in the reverse wire yet, but the break and turn signals should still work correct?

Fyi, this is on my 2024 Sierra HD. Any suggestions are appreciated otherwise I may have just gotten a dud. 

 

 

Edited by Nick McDermott
slj2008 Senior Enthusiast

slj2008

Posted
Posted
3 hours ago, Nick McDermott said:

Hey guys, 

 

Have any of you tried out this lightbar from Amazon? I purchased the triple led 60" bar with the 7 to 4 easy connect harness that connects into the trailer adaptor but nothing is working...My only thought is that i havent tapped in the reverse wire yet, but the break and turn signals should still work correct?

Fyi, this is on my 2024 Sierra HD. Any suggestions are appreciated otherwise I may have just gotten a dud. 

 

 

test the light strip on your work bench, see if it works. check your trailer plug for power.

Nick McDermott Enthusiast

Nick McDermott

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24 minutes ago, slj2008 said:

test the light strip on your work bench, see if it works. check your trailer plug for power.

 

So I just heard back from Opt7 customer support and they said they 7 to 4 pin harness doesnt work with 2020+ vehicles and that I need to hardwire the led strip....Wish they would have made that very clear as I wouldnt have purchased....

davidm767 Enthusiast

davidm767

Posted
Posted (edited)

Nick, I ran into the SAME exact problem this morning when I tried wiring it up. The light bar works GREAT on my wife's rental SUV 4 pin connection. However I do not have ANY power to my 7 pin or 4 pin, even with a Curt 55384 inline. So I'm going to ask the greater community WHY the 4 pin in-bed and 7 Pin in Bumper connectors show no power!?

 

I'm very likely returning my power bar if it turns out I'll have to hardwire into the lights...these trucks are surprisingly sensitive to electronics and I'm unwilling cause other issues by splicing into factory wiring. My wifes 2023 Suburban went through about 3 sets of LED bulbs (even ones that said they were CANBUS compatible) and NONE of them worked without triggering a message and causing some VERY strange things to happen to her Entertainment center. 

Edited by davidm767
davidm767 Enthusiast

davidm767

Posted
Posted

Nick, 

 

If you refer to the troubleshooting forum I brought up the problem. There might be a work around that I'm going to test tomorrow (Curt 57004 7 to 4/5 pin WITH built in Resistor). If this works I'll happily report back. 

Nick McDermott Enthusiast

Nick McDermott

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On 10/20/2023 at 6:15 PM, davidm767 said:

@Nick McDermott

 

I can now confirm that the Curt 57004 works GREAT with my OPT7 bar in my 2024 2500HD LTZ. The light bar looks great!


David, I ended up getting the Curt 55384 connector. I heard the only difference is I need to tap into something for constant power? Not sure what they means or what to do. I tried just hooking up the adaptor and it worked for 2 seconds then my truck said “trailer disconnected check connection” - I’m beyond frustrated 

Nick McDermott Enthusiast

Nick McDermott

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On 10/20/2023 at 6:15 PM, davidm767 said:

@Nick McDermott

 

I can now confirm that the Curt 57004 works GREAT with my OPT7 bar in my 2024 2500HD LTZ. The light bar looks great!

Also where did you tap your reverse into? 

Nick McDermott Enthusiast

Nick McDermott

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How are we the only ones that have dealt with this? Seems like it should be this complicated and I’m now three harnesses in and still no results. 

davidm767 Enthusiast

davidm767

Posted
Posted
4 hours ago, Nick McDermott said:

Also where did you tap your reverse into? 

I tapped into the Curt 57004's 5th female port (the unused port) with the reverse wire. I used a Bullet style butt connector to make it a semi-permanent fit. I emailed OPT7's customer support team with the suggestion and they said they would pass along the information to their engineering team. I also left a review on their amazon page so others can be made aware that the 57004 is the solution to GM truck issues. I however doubt we are the only ones running into this problem!

Nick McDermott Enthusiast

Nick McDermott

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9 hours ago, davidm767 said:

I tapped into the Curt 57004's 5th female port (the unused port) with the reverse wire. I used a Bullet style butt connector to make it a semi-permanent fit. I emailed OPT7's customer support team with the suggestion and they said they would pass along the information to their engineering team. I also left a review on their amazon page so others can be made aware that the 57004 is the solution to GM truck issues. I however doubt we are the only ones running into this problem!


but you have the 57004 exposed on the outside and you have to unplug when trailering? 

davidm767 Enthusiast

davidm767

Posted
Posted

I have the Max tow package and a Diamondback Switchback hard cover which protects the connector (inside the bed) from the elements. I have zero issues with disconnecting the bar when towing, because it’s quick and easy. The bar is not much helpful anyway when there’s a trailer in the way. 

Nick McDermott Enthusiast

Nick McDermott

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20 minutes ago, davidm767 said:

I have the Max tow package and a Diamondback Switchback hard cover which protects the connector (inside the bed) from the elements. I have zero issues with disconnecting the bar when towing, because it’s quick and easy. The bar is not much helpful anyway when there’s a trailer in the way. 

 Ok then we're looking to do two different things. I am looking to have the lightbar connected behind the back bumper and still be able to use the port for trailer connector. I just need to figure out why my truck (2024 GMC Sierra HD) is saying "trailer disconnected" when I use the Curt harness 

davidm767 Enthusiast

davidm767

Posted
Posted

Reference this reply to a post I made in the troubleshooting forum. It’s probably the Trailer lighting control module that’s causing issues: 

 

Nick McDermott Enthusiast

Nick McDermott

Posted
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10 minutes ago, davidm767 said:

Reference this reply to a post I made in the troubleshooting forum. It’s probably the Trailer lighting control module that’s causing issues: 

 

 

Thank you but I just dont want a plug or wiring from the led bar exposed on the outside whatsoever. Is there no adaptor harness that that "sees resistance" on the market? Hard to believe 

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