Electrical Assistance Please!

[sk8er32283]

First of all I am posting here because there is more traffic across this board.

I have a 66 suburban

I have two issues I am trying to solve. Well, with the truck anyways

The first may or may not be specific to a suburban. The license plate light is out and I can not find out how to remove the globe so that I can get at the bulb. I remove the mounting screw and looked it all over for sign of how the globe can be removed. I tried to also just twist off the globe but it doesn't want to twist much at all. The is in pretty good condition so I don't want to be to rough with it.

The second is my rear drivers blinker. All the tail light filaments work as they should accept this one. I have verified voltage at harness connection below the back end and at the light bulb housing and at the little spring loaded connection in the bulb mount. I know the ground is good because the running light filament is fine. My initial though was that the wire may have a high resistance connection, so i rigged a wire from the harness connection below the back end up to the taillight housing to rule out that section of wire. I had the same issue, an oscillating voltage from about 4-9(engine off) volts but the light bulb filament would not work. For ****s and giggles I put my wire rig to the other filament(running light) and it did not work either. I did ohm check the bulb filament to make sure they were good too. Right now, I am thinking that there is some sort of high resistance connection upstream of the under bed harness connection somewhere. But I wanted to know if someone with more electrical issues experience could impart some knowledge on me.

Thanks in advance.