Turn signal switch, taillight not lighting up, no dash lights and more!

[Kern Dog]

If someone takes the time to try to help another person, their efforts should be applauded.
I always appreciate the effort even if it does not bear fruit.

 

[Bennoel 10]

Iirc one time it was a loose speed nut on the printed dash circuit board. I believe over time some corrosion hampered the connection ?

 

[toolmanmike]

A lot of A body stuff carries over. I don’t know the details on the early A body cars but a lot of the 68-72 stuff is similar, 73-75 too.
1967 was a weird year with early and late stuff. 1976 had some one year only stuff related to emission controls.
I think I got this figured though.
1972 did have a few small unique things. The plastic housings used the external ground with a tab on the outer edges of the bulb socket.

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This is the only year that I have seen that has this two wire terminal to a blue colored collar. Sort of weird.

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Looking close, there is a tab to index the collar in the socket to get the bulb to make contact with the “contacts”.

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If that collar is out of position, the bulb’s contacts won’t touch, no light. There are three indentations, two are for the pins on the side of the bulb housing, one is to index the collar.

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I did have power to the wires.

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The inside of the socket was cleaned with a Scotch Brite, the collar was put in properly and….

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Now onto dealing with the dead gauge lights.
That is usually the headlight switch, right ?

Well done Greg. Way to figure it out.

 

[michiganpat]

my 50 year old headlight switch crapped out on me this year as well, went with the Standard Motor Product part (DS357 for my '76, looks like DS165 for a '72) not their T-series, the more expensive one. everything has worked flawlessly since.

 

[Big.J.007]

The 1 piece headlight switch required Knob turned all the way left to turn on dome light and just off that detent was the dash lighting brightness.. Try moving the knob left and right with the headlights on to see if they illuminate.