Looking for help with Aux backup light wiring
Got a pair of Amazon LED cube lights and mounted under the rear bumper as everyone else does on here that installs backup lights. Wired up passenger side and tapped into the stock reverse light wires (in the taillight assembly), no issues. Wired drivers side the same way and this is where the issues started. Got everything tapped in and got in the truck to give a quick test before putting the taillight assembly back in. Started truck, put in reverse and all reverse lights (stock and aux) came on for about 2 seconds and then all shut off. First thoughts was blew a fuse. Shut truck off, waited a few seconds and started it back up. Put it in reverse and exact same thing happened, quick on and off. Checked all the wires and connectors that we used to tap into stock wires and everything seemed normal. Again, same method as the passenger side. Tried moving the connector from the negative further away from the power wire connector and then nothing worked at all. Took the quick connector off the negative wire and now all reverse lights come on and stay on except for drivers side aux light. Got fed up with not being able to figure it out so we called it a day. It was the last project out of 3 that day that all ended poorly so we were both aggravated already.
Any of you electrical experts have any thoughts on what's going on here? Any help or input would be appreciated.