Thanks to Make It Sparkle I can turn Deathtrap's melee attacks into Shock elemental. Does he get my shock damage boost from Wires Don't Talk? Further, does he also get shock damage boosts from other sources like elemental relics?
If you set Deathtrap's element to Electrical through the use of Make it Sparkle, then Wires Don't Talk may also increase his damage.
However looking at the actual skill description for Wires Don't Talk.
Increases all Shock and Electrocute Damage that you inflict.
Shock and Electrocute Damage: +3% per skill rank.
It mentions you specifically, so that you lead me to surmise that it won't apply to anything else.
There doesn't seem to be much chatter on the Gearbox forums about these skills.