The resistor mates with the COIL. It's the coil design that requires, or not, the series resistor. It does effectively protect the points, but high resistance coils don't need 'em and low resistance coils do. (Low resistance could build up a magnetic field FASTER, and the resistor limits total current once charged.) TFI type coils need 'em; a lot of old cylindrical types do not. What makes it confusing is that some of the old canister coils that need resistors, use the resistance wire in the harness as their resistor,so you can't tell by glancing under the hood if it's there or not. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://splatter.wps.com/pipermail/amc-list/attachments/20090329/dbc1276c/attachment.htm _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list