1970 porsche 914 ignition switch wiring, How does original ignition switch differ from new aftermarket switch. Options

[radobard]

I just replaced my ignition switch on my 1970 porsche 914 4. The replacement switches have four wires connected , red, red/white, black, and grey. My original switch had five wires, red, red/black, black, grey, and a copper see through wire. First question, does the red/ white wire on the original replace the red/black wire on the new? Second question, what is the function of the copper see through wire? If I don't have it in the replacement switch, will something not work? Here is a photo of an original switch with the five wires. The see through copper looking wire is at the top.

[JeffBowlsby]

That clear jacketed solid flat copper conductor goes up into the mechanical section of the keyed ignition lock mechanism, it is not part of the electrical ignition switch. I ohmed out the circuits and it appears to be the ground for the buzzer because it grounds at the first click of the key switch, is off otherwise.

[mark04usa]

That clear jacketed solid flat copper conductor goes up into the mechanical section of the keyed ignition lock mechanism, it is not part of the electrical ignition switch. I ohmed out the circuits and it appears to be the ground for the buzzer because it grounds at the first click of the key switch, is off otherwise.

(IMG:style_emoticons/default/agree.gif) Yes, the end of the flat copper ground gets squashed in an interference fit between the tumbler body and the column housing. When it doesn't ground well, my warning buzzer doesn't work. I left it that way for years just to get rid of annoying buzzer (IMG:style_emoticons/default/shades.gif)