Keep blowing CLK-LTR/CTSY fuse

[1967RS/SS]

I keep blowing the CLK-LTR/CTSY HAZ 20 amp fuse.  While trying to track down the problem and instead of burning through fuses, is there another way to test?

I thought it was the door jamb pin switch because the threads are stripped so I put a nut on the backside of the switch and cleaned the paint around the switch but it still blows the fuse. 

[Mike S]

my 67 had that problem. remove the orange wire from the lighter and see if the short goes away.

[Kelley W King]

If it is constant pretty easy to find, if is intermittent might take a while. If it is shorted some testers beep when used. I connect it and while it is beeping go check the various devices and if the  beep varies I know I am close. For the hearing impaired a light works also.

[1967RS/SS]

I finally found the issue.  I had a single contact bulb in a two contact socket.  Installed the right bulb and my sail panel and courtesy lights are all lit up now!  Thanks and on to the next issue