LED tail lights with resistor, CC inop

[bdl04]

Hey everyone,
I just installed some new LED tail lights on my 05 Yukon Denali and now cruise control doesn't work. Now that I have this issue I have seen that this is common and that the main fix for it is an in-line resistor. These tail light assemblies came with a resistor already wired into each of the assemblies but still no cruise control. Here's a link to what I got:

https://www.amazon.com/dp/B07Q46R969?psc=1&ref=ppx_yo2ov_dt_b_product_details

Any ideas how to fix this? I assume check fuse for CC but is there anything else anybody knows about that might have caused this?

Thanks!

 

[dps01]

I have some of those in my Amazon cart that I have not pulled the trigger on… Think I will wait to see what the final solution is.

 

[Fless]

Where do you see that they have integrated resistors? I see one review that asks how to fix the cruise control, and the answer is to add resistors.

 

[bdl04]

Where do you see that they have integrated resistors? I see one review that asks how to fix the cruise control, and the answer is to add resistors.

It shows them in the 4th picture on Amazon. Also, I have them and can see the resistor. It's not super clear from instructions which lead from the harness goes to each of the connectors on the tail light assembly so maybe I just have them flip flopped. The running light, brake light, and signal seem to all use the same set of LEDs so I'm going to try swapping and see if that fixes it. Don't have the highest hopes that'll work though.

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

You are already receiving clarifying questions from the knowledgeable folks on this Forum.

 

[bdl04]

Here's my Yukon with the lights installed. I noticed that I had the wires between connectors crossed. Fixed that and still no dice. Going to swap the connectors all together later and see if that does it. If not, I'm out of ideas.

 

[wjburken]

Put your old lights back in and if your cc works, it’s most likely the new lights.

Put an ohm meter on the old lights and compare that reading with the same reason in the new lights.

My guess is your new lights have a slightly too small resistor and the system thinks you have a bulb out.

 

[adventurenali92]

Put your old lights back in and if your cc works, it’s most likely the new lights.

Put an ohm meter on the old lights and compare that reading with the same reason in the new lights.

My guess is your new lights have a slightly too small resistor and the system thinks you have a bulb out.

This is probably the most accurate answer. I have LED tails and they had resistors built in already as well. I had to run extra resistors on the LED tails, tied into the running light setup since on mine, and I’m assuming the OP’s lights, the running light also functions as a brake light so it needs proper resistance in order for cruise control to function correctly.

 

[bdl04]

This is probably the most accurate answer. I have LED tails and they had resistors built in already as well. I had to run extra resistors on the LED tails, tied into the running light setup since on mine, and I’m assuming the OP’s lights, the running light also functions as a brake light so it needs proper resistance in order for cruise control to function correctly.

I think you all are correct. Thanks for the advice. I'll get that going and let everyone know how I end up for future reference.

Thanks!

 

[adventurenali92]

I think you all are correct. Thanks for the advice. I'll get that going and let everyone know how I end up for future reference.

Thanks!

Keep us posted on what happens with it. Also nice looking 2005 Denali. My 2006 Xl Denali is the same color.

 

[bdl04]

Keep us posted on what happens with it. Also nice looking 2005 Denali. My 2006 Xl Denali is the same color.

Thanks. I got it from a family member on a crazy good deal and at first I wasn't stoked on the color but it has grown on me. I have a 05 silverado with the 5.3 as well and the 6.0 is so much better with the 4 speed. Absolutely love the thing.

 

[adventurenali92]

Thanks. I got it from a family member on a crazy good deal and at first I wasn't stoked on the color but it has grown on me. I have a 05 silverado with the 5.3 as well and the 6.0 is so much better with the 4 speed. Absolutely love the thing.

My thoughts are the same on the color. lol. I had three colors specifically picked out and couldn’t find anything for saw in what I wanted. Everything was either black or white. This was the first one outside of black or white and not totally thrashed I found. After buying it the color grew on me. It hides dust quite well so when it’s mildly dusty it still looks pretty clean haha.

 

[bdl04]

Yes man. I got a blue silverado and that thing always looks dirty. The yukon always looks better.

My thoughts are the same on the color. lol. I had three colors specifically picked out and couldn’t find anything for saw in what I wanted. Everything was either black or white. This was the first one outside of black or white and not totally thrashed I found. After buying it the color grew on me. It hides dust quite well so when it’s mildly dusty it still looks pretty clean haha.

 

[wilcfr]

Had the same problem with my 2003 Tahoe. It's the aftermarket lights. The LEDs do not have enough, for lack of a better term, resistance in the bulb themselves. So, the car senses that you have the brakes on. Hence no CC. You can buy an online resistor for the wiring and it solves the problem. Can't remember the particular part. I owned the Tahoe in 2002-03. Had to get rid of it. It was a lemon. Beautiful vehicle but a rolling piece of crap. Replaced it with an 04 that never gave me any problems.

 

[bdl04]

Had the same problem with my 2003 Tahoe. It's the aftermarket lights. The LEDs do not have enough, for lack of a better term, resistance in the bulb themselves. So, the car senses that you have the brakes on. Hence no CC. You can buy an online resistor for the wiring and it solves the problem. Can't remember the particular part. I owned the Tahoe in 2002-03. Had to get rid of it. It was a lemon. Beautiful vehicle but a rolling piece of crap. Replaced it with an 04 that never gave me any problems.

Yep. I think the issue is that the aftermarket assembly came with a resistor but only for the turn signals. So, I'll just need to get one on the brake circuit and I should be good.

 

[petethepug]

The solution to LED lamps isn’t resistors. Once you get enough in there you’re creating enough heat to melt a lamp socket.

New technology just hit that has tiny little fans built into the base of the bulb. They’re slowly hitting the market. Electric motors are one of the highest consumers of power and they’re self sustaining in their cooling as long as there’s a fan blade attached.

These little suckers create enough load to fool the BCM into knowing an incandescent bulb is there as well as preserving the life of the bulb and wiring with the fan.

 

[bdl04]

Problem solved! Installed a 50w 6R resistor on both the brake light curcuits and we have cruise again! I went to Ace and got a u-bolt and some 90 degree bent sheet metal brackets and mounted the resistors on the little rib behind the light assembly to dissipate the heat. They definitely get hot quick. It's a little sloppy but it'll do. Thanks for everyone's help on this. Also, I put a KN cold air intake on while I was working on the truck. So stoked.

 

[adventurenali92]

Problem solved! Installed a 50w 6R resistor on both the brake light curcuits and we have cruise again! I went to Ace and got a u-bolt and some 90 degree bent sheet metal brackets and mounted the resistors on the little rib behind the light assembly to dissipate the heat. They definitely get hot quick. It's a little sloppy but it'll do. Thanks for everyone's help on this. Also, I put a KN cold air intake on while I was working on the truck. So stoked.

Photos or it didn’t happen lol

 

[bdl04]

Photos or it didn’t happen lol

Shit... you got me lol

 

[Tajohns34]

There is a built in resistor for the turn signals, but you have to add one for the brake lights. Cruise control won't work because it thinks your brake lights are out. I just fixed the exact same thing and i have those exact same tail lights.