CASTLEDFW15
Full Access Member
Good morning all….
Has anyone tried changing 2021 Tahoe rear brake lamps to LED?
I think I got it but still would prefer to get a harness that already has resistors built in.
I did some continuity/voltage checks and also while I am here want to verify.
There are three wires in the OEM wiring harness. I narrowed two of them as power and ground.
Confirm please the wiring diagram.
Yellow………………..Power
Black -#1…..(outer)…….aground/earth etc RGB
Black #2……….That is the mystery wire…..Normally I would think parking and or turn signal but the turn signal/hazard flasher is on a separate bulb, socket and harness……. Any idea what this wire is for…………..
With that out of the way let’s go on to the thread header subject…..
I have upgraded the turn signals to LED (LASFIT) and plug and play…..will give a check turn signal message if operated too long….traffic light etc…. Bulbs fit and intensity is well above OEM incandescent bulbs but not blinding.
Same company offered 921 (Backup lights) but not recommended or at least plan on installing a resistor to avoid the CANBUS error message…..(Check Reverse Lamps). Will clear after a few minutes in drive or you can manually cancel the message with the scroll wheel. Resistors needed to avoid message, but bulb falls out of the lens housing….yes lost and bulb gets stuck in the lens housing. Took a while but I got it out. Refund issued by LASFIT and didn’t require return. Bulbs work and are bright but again have to clear the message. I am thinking resistor will or at least should remove the error message.
I noticed and tried a set just to see if it can be done. There is a 7440 wiring harness that is plug and play for the bulb and socket side. The harness has a interface upstream of the bulb side.
My question is………….
How far upstream is the interface connector? Even if for some reason The OEM brake light harness needed to be replaced how much work is it and what access panes may need to be removed? By panels I am referring to fender well inside and or bumper cap.
If removing the OEM harness and just plugging the LED harness with resistors not only provided but instead so literally plug the bulb to the socket and the upstream end of the wiring harness into the interface I would prefer that option.
To summarize………two major questions.
1…..what is the third (middle) wire used for?
2……. Has anyone removed and replaced the OEM brake light wiring harness and how difficult is it as in where is the upstream connection located?
Thanks all…….oh wait a minute…Texas………..y’all!!!
Has anyone tried changing 2021 Tahoe rear brake lamps to LED?
I think I got it but still would prefer to get a harness that already has resistors built in.
I did some continuity/voltage checks and also while I am here want to verify.
There are three wires in the OEM wiring harness. I narrowed two of them as power and ground.
Confirm please the wiring diagram.
Yellow………………..Power
Black -#1…..(outer)…….aground/earth etc RGB
Black #2……….That is the mystery wire…..Normally I would think parking and or turn signal but the turn signal/hazard flasher is on a separate bulb, socket and harness……. Any idea what this wire is for…………..
With that out of the way let’s go on to the thread header subject…..
I have upgraded the turn signals to LED (LASFIT) and plug and play…..will give a check turn signal message if operated too long….traffic light etc…. Bulbs fit and intensity is well above OEM incandescent bulbs but not blinding.
Same company offered 921 (Backup lights) but not recommended or at least plan on installing a resistor to avoid the CANBUS error message…..(Check Reverse Lamps). Will clear after a few minutes in drive or you can manually cancel the message with the scroll wheel. Resistors needed to avoid message, but bulb falls out of the lens housing….yes lost and bulb gets stuck in the lens housing. Took a while but I got it out. Refund issued by LASFIT and didn’t require return. Bulbs work and are bright but again have to clear the message. I am thinking resistor will or at least should remove the error message.
I noticed and tried a set just to see if it can be done. There is a 7440 wiring harness that is plug and play for the bulb and socket side. The harness has a interface upstream of the bulb side.
My question is………….
How far upstream is the interface connector? Even if for some reason The OEM brake light harness needed to be replaced how much work is it and what access panes may need to be removed? By panels I am referring to fender well inside and or bumper cap.
If removing the OEM harness and just plugging the LED harness with resistors not only provided but instead so literally plug the bulb to the socket and the upstream end of the wiring harness into the interface I would prefer that option.
To summarize………two major questions.
1…..what is the third (middle) wire used for?
2……. Has anyone removed and replaced the OEM brake light wiring harness and how difficult is it as in where is the upstream connection located?
Thanks all…….oh wait a minute…Texas………..y’all!!!