LH front turn signal socket

Just got an 1988 Thunderbird Turbo Coupe
Turn signals don’t work figured it was just a bulb
turns out there is one missing! On the driver side and it seam like there is also a secondary plug missing because the bulb did not fit into the socket that is there. The socket assembly on the left side is different than the right side. I got a socket assembly like the right side with a pig tail to just replace it but it’s a lot different than what’s there. Can anyone help, I am thinking there is a secondary socket I need!!

Can you explain a little more on what you mean by secondary socket? A picture maybe?

See attached photos

From what I can tell that looks the same as what's on my 88.

Thanks I figured out the issues , it’s a different socket that takes a different style 1157A bulb! One CD socket takes the new style plug in 1157A bulb vs the old style twist in 1157A bulb, and it was done on 2 of each on the car . No standard

I just discovered the same inconsistency. I’m putting in LEDs and the driver side won’t accept the LED but the passenger side fits and functions perfectly. I just ordered another socket from RockAuto that is the same as the passenger side. No idea why Ford would use two different styles and it makes my paranoia kick in as to if there is a reason for that. For the record, Both my outside turning lamp sockets are for the twist style bulbs but my inner marker lamps are the style that take the spring clip to affix.

The reason it doesn’t fit in the driver side is that it has a different design with a deeper socket than the passenger side causing the LED housing to bottom out before the detents can engage the slots on the socket.