Right side running light not working but everything else does

[mn-chevy]

Recently a co worker pointed out to me my passenger side tail light was out at night time. 

I believe this is considered the running light function?

both bulbs are new and recently replaced. brake, turn, hazard functions all work fine on it but when its night time or I force the lights on the right side does not stay lite. 

Has anyone had this issue in the past or know of a possible fuse location that could be linked to this?

its a 2015 silverado ltz z71 if there is any difference in the trim fuse blocks. 

[CamGTP]

Use a mulitimeter on the plug, see if you have power at the socket. From there you could see if you have power further down the line at the harness plug in.

[mn-chevy]

Im sorry, which plug is it your referring to? Is there a separate plug for this function as the turn, break, and hazard functions all work perfectly fine on it?

 

attached is my engine bay fuse box. 

[silveradosid]

look under the back of the truck, there is a junction block that every thing at the back plugs into, unplug the one for the tail light and see if there is any corrosion

[Lsgun1]

Check for power at the light socket itself. Swap the working bulb with the non working bulb to see if you just have a bad bulb.

[mn-chevy]

I have put fresh bulbs in and tested on the driver said light and they all work fine, so we know its not a bulb issue. 

I have yet to look under the truck for any corrosion. 

I did tape the harness on the back of my bed and a bunch of corrosion and dirt came out of the lights sockets. here is a picture of what they look like on the passanger side. 

I also was proactive and ordered one of the harnesses online. 

https://www.amazon.com/gp/product/B073ZPQQL7/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

[Lsgun1]

Do you have power at the socket?

[mn-chevy]

yes sir. 

[Lsgun1]

Trace that harness back down and look for where it grounds.

[mn-chevy]

is there a separate channel for all the power and why signals and breaks work but running and park wouldn't in this case?

[silveradosid]

all the lights share the same ground, if the park lights dont work it is because there is no power getting to them

[mn-chevy]

just wanted to update 

 

after replacing the whole harness it turns out that fixed the problem.