Sounds like a dead battery to me.  Sitting for a year and a half will kill most batteries. They look like they take a charge, but it doesn’t hold. Try swapping a good battery before you dive deeper.

Stuart

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of thewestyman
Sent: Monday, May 02, 2016 10:28 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Turn signal puzzle

I am in Europe with my ‘86 Westfalia.  It was sitting for a year and a half and besides I had to charge the batteries again, the only one thing is not working properly is the turn signal.  As I switch on there is a momentary flash and then nothing.  It is not blinking.  Both sides it does the same.  I left it on for a few more seconds but I was not sure if I may not cause some overheating of an electrical item.  I’m guessing, there is a relay.  But my thinking would say, that it should not fail because of not being used for a long time.  I can’t guess what is the number on that relay.  
Anyone had any experience with this?
Zoltan