Aux fan running ???

Jumper this sw and see if fan comes ON

http://catalog.worldpac.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=23I0RAMEE24118NOLA&year=1986&make=MB&model=420-SEL-001&category=R&part=A%2FC+Temp.+Switch