Help for Unreliable combo brake turn signal light on trailer

IF it is a LED light assbly, odds are it is BAD. BUT, you need to pop it out and check the wire connections to the light. IF they used a Tap Splice, the splice is probably not installed correctly. Doug

This is what a tap splice looks like.

https://www.lowes.com/pd/Utilitech-20-Count-T-Tap-Wire-Connectors/999956682?cm_mmc=shp-_-c-_-prd-_-elc-_-google-_-lia-_-106-_-electricalaccessories-_-999956682-_-0&placeholder=null&ds_rl=1286981&ds_a_cid=112741100&gclid=CjwKCAjwybyJBhBwEiwAvz4G7xbRqXd2EAJr7sP0jHrCJ7Ekuf6bkDNxBUrNIMUasnohk6LJQMFG3xoC8HoQAvD_BwE&gclsrc=aw.ds