No Running lights with LED Tail lights

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

ThatGuy3512

Junior Member
Joined
Dec 8, 2022
Posts
1
Reaction score
0
Location
ORANGEVILLE, ON
Ram Year
2015
Engine
Hemi 5.7
Hi,

I have a 2015 Ram 1500 Bighorn. I bought some after market LED Taillights off Amazon. I installed them, the brake and turn signals work fine. The running/marker lights not so much. When you turn the key to on but don't start the truck the marker lights work but when you start the truck they flash randomly 3 times then stop working. Is this as simple as just wiring in a resistor for the marker lights? If so, what size resistor would be recommended? I'm new to the wiring/electrical/LED thing so I appreciate the help.

Thanks.


Link to the Taillights I bought:
 

Omar57

Junior Member
Joined
Feb 9, 2023
Posts
2
Reaction score
0
Location
Las vegas
Ram Year
2016
Engine
5.7
Im having the same issue. Anyone have an idea what it could be? My front passenger parking light is out, it flashes 3 times before it shuts off
 

Jpage978

Senior Member
Joined
Mar 6, 2022
Posts
140
Reaction score
63
Location
North Shore Ma.
Ram Year
2019
Engine
5.7 Hemi
Was having same issues with 2 sets of Amazon taillights, everything work except the running lights wouldn't come on with headlights, I believe it's the lights themselves, they don't play well with our rams, I just bought alpharex pro taillights and worked like a charm, I did have to Install the resistors they send if need them, and change settings in alfaobd to get parking light error message to stop
 

crash68

ACME product engineer
Staff member
Administrator
Supporting Member
Joined
Mar 20, 2016
Posts
10,604
Reaction score
16,486
Ram Year
2015
Engine
3.0 EcoDiesel
The running/marker lights not so much. When you turn the key to on but don't start the truck the marker lights work but when you start the truck they flash randomly 3 times then stop working.
You might be able to fix this with AlfaOBD by setting the tail lights to LED type but a good probability you'll need to use resistors.
 

Jpage978

Senior Member
Joined
Mar 6, 2022
Posts
140
Reaction score
63
Location
North Shore Ma.
Ram Year
2019
Engine
5.7 Hemi
Yes Alfaobd definitely helped with installation of led conversion on my truck, but in my case it didn't help with parking light out message, that's where resistors come in
 

Recon78

Junior Member
Joined
Feb 2, 2020
Posts
9
Reaction score
4
Location
Washington State
Ram Year
2016
Engine
Hemi 5.7
Where can you buy the alpha obd? I’m having the same issue. Bought led taillights from Amazon. The running lights doesn’t work when you turn on the engine. It only works with the engine turned off.
 

04fxdwgi

Senior Member
Military
Joined
May 19, 2023
Posts
416
Reaction score
530
Location
Coastal NE North Carolina
Ram Year
2016 1500 Sport
Engine
5.7 Hemi
https://www.alfaobd.com/ Download it for PC or go to the android ap site and load it on the android device. Pay for it right thru the ap.

You'll also need a bidirectional OBDII device, such as a OBDLink MX+, available at many places. Use Google.
 

Badger 13

Senior Member
Joined
Jul 30, 2018
Posts
1,153
Reaction score
1,110
Location
North Idaho
Ram Year
2013 Dodge Ram 1500
Engine
5.7 Hemi
From my understanding the 2015's were the most sensitive to any electrical changes. Also, make sure your LED replacements are canbus error free, that could be the problem.
 
Top