Hi, I was wondering if you could tell me what the heck this symbol means.

/  o o  \
| o   o |
\  o o  /

sorry for the crudeness, but i noticed you cant post pictures.  The circles in the middle are actually connected so it's one large circle.

Thanks!  

I have a elderyl friend who has an 89 300d. The dash lights went out suddenly but all other lighting associated with fuse 1 work fine as does the main light switch. Is there a voltage reg between the main switch and the reostat switch below the speedometer?? Any other ideas besides the reostat switch??