What model and year car are we talking about here? Most Chrysler products of the 60's and early 70's have one fusible link. It should be a #16 gauge dark blue wire that often had a small tag on it reading "link" or "fuse".
Sorry Pete...it is a 1975 Scamp...was replacing dash bulbs and when I turned the key on,smoke came from my firewall...some of the guys suggested fuseable link and they are probably correct...I have had the dash out before and never had any problems...could the positive cable that attaches to the back of the dash maybe shorted if it made contact with metal???...Marla