is there a fusable link

Is there a fusable link in the wire going from the temp sender to the instrument cluster on a 1976 Duster. I now have a 440 engine in it. I thought I would try this and it didn't work. I wanted to check the accuracy of the factory gauge in the instrument cluster so I bought a separate temp gauge and hooked it to the sending unit along with the factory one to compare them and I guess something must have back fed to the factory gauge because it wouldn't work. I bought another factory gauge from a member on here and changed out the gauge in the cluster and that one isn't working. So I either got a bad gauge from him or I must have blowed something in the wire from the sending unit to the cluster. Doe anybody have any input on this.