Voltage issue - Gauge Cluster and wiring Questions

[greywurm]

Since the distributer was upgraded to HEI, I decided to compare shorty's FAQ on the conversion to how it was done on my truck. Appears to be ok, except shortly after his tutorial, there is a post talking about a white resistance wire that is split to two yellow wires, one for the starter and one for the dist. I checked mine, but its spliced from a tan wire that runs to the firewall, then inside the cab, its pink. I think its the pink wire to the ignition. Since it's a soldered splice, I am thinking its factory... is there a way to tell if the wire is resistance, or am I going down a useless road