Wow. That thing is definitely carrying around a bunch of Enclave intel. Adams is on the eastern seaboard of the country. Which means this little "Duraframe" sucker somehow managed to survive for over two thousand miles. Certainly lives up to its model name.
When trying to gain the Brotherhood of Steel's trust (without the help of Veronica), a keyword is spoken after killing or convincing the NCR ranger to leave Hidden Valley.
Complete Still in the Dark, leave the Hidden Valley bunker, and return again after waiting a few days. A Brotherhood Scribe will thank you and tell you of a footlocker stashed with recharged energy ammunition. If you try to talk to this Scribe again, ED-E will immediately play the message.
When you first talk to Michael Angelo on his workshop at the New Vegas Strip, talk about his "lack of inspiration" and choose the medical answer. It will still work even if the requirements are not fulfilled.
Talk to Quartermaster Mayes at Camp Forlorn Hope about locating supplies sent from Helios One for the Restoring Hope quest.
Talk to Doctor Henry at Jacobstown about his previous employment with the Enclave.
Talk to Apprentice Watkins both about her parents and her decision and ask her about all the computers.
After three in-game days, the upgraded ED-E will return to Primm.
Talk to ED-E.
(Optional) Bring ED-E to the Gibson Scrapyard in Novac.
ED-E appears to have some Enclave log data stored that is triggered by some keywords.
The Followers of the Apocalypse would like to see ED-E to get access to the logs he has stored.
Find the patrol Knight Lorenzo told you about to let the Brotherhood of Steel examine ED-E.
The patrol Lorenzo mentioned is dead, perhaps there is something on one of the corpses that may be useful.
There was a password on one of the Brotherhood corpses. Perhaps that could be used to bring ED-E to Lorenzo.
Speak to Knight Lorenzo in Hidden Valley about ED-E.
Lorenzo would like to examine the data on ED-E. He offered to upgrade ED-E's armor while he was working on it.
Lorenzo is examining ED-E and updating its armor. It should be ready in a few days.
April Martimer with the Followers would like access to ED-E's data. She promises to upgrade its weapons while she works on it.
April has ED-E and will be working with it for a few days to access the data and upgrade its weapons.
ED-E's upgrades are complete.
If you have previously entered the Hidden Valley bunker (with Veronica, for example) you will not need to recover the entrance password from the Brotherhood squad in the REPCONN building.
If you have killed everyone in the Hidden Valley bunker, April Martimer will automatically contact you after two days.
The numbers of in-game days listed above do not always work as it is implied they should when using the "wait" feature. However, not receiving a message after waiting does not mean the quest has glitched or failed.
As of patch 1.3, ED-E's inventory will not be cleared after he is returned to you.
Behind the scenes
The name of the quest is a reference to the 1956 song "Eddie My Love" by The Teen Queens, which reached #14 on the Billboard Hot 100 chart in March of that year.
PCPlayStation 3Xbox 360 If the player talks to Old Lady Gibson and goes through all the dialog before recruiting ED-E, she will no longer trigger the log. Go speak with Ignacio Rivas or any NCR trooper inside HELIOS One instead. This can be resolved on the PC version by using the resetquest 001572e8setstage 001572E8 10 commands in the console to reset.
PCPlayStation 3Xbox 360 After completing the quest, ED-E may suddenly stop following you and be unable to attack, but will still be responsive to dialogue and can still be used as a storage container. It usually happens once you enter combat and he may begin following again once you fast travel or go through a door. This bug may still persist later on, however.
PCPlayStation 3 Sometimes, when ED-E is given to the Followers, his laser appears to stop working, and trying to change his weapons on the companion wheel shows no name.
PC Sometimes, talking with the right people won't trigger the first message, and neither will the console commands. In this case, try waiting several days before trying to activate the first message. There has been success receiving the first message after a 10-day wait.
PlayStation 3 Sometimes, if you upgrade ED-E's laser in one save, ED-E may spawn with his upgraded laser in a new save. This enables ED-E to upgrade its armor while having a laser upgrade.
Xbox 360 After getting the upgrade from the Brotherhood of Steel, ED-E will sometimes become immobile. Reloading to a previous save works, but only for a short amount of time. No known fix.
Xbox 360 If you get the upgrade from Followers of the Apocalypse, ED-E will randomly go and disappear, even though you can't see ED-E, he is still there to interact and fight, this can be fixed by reloading the save.
Xbox 360 Sometimes ED-E will not respond to a second quest trigger, though his weapon system will be upgraded. This results with an ED-E covered with bumper stickers firing blue projectiles and the quest being unable to be completed.