rpm window switch and a gen I

[Scott E. Smith]

Hey everyone....I have a 94 R/T 10 with a nx nitrous kit...I have a MSD rpm window switch that was modified by MSD to work with the viper...my question is where is the correct place to obtain the rpm signal? if anyone knows, that would be great...thanks in advance

 

[MES]

On a Gen II you hook it to one of the coil packs by tapping the PCM. There are 5 packs on a Viper, I used #3 I don't know about the Gen I but it's probably the same.

 

[HP]

I'm going from memory, the #4 coil wire was convenient, since it was on the #1 pin, just like the light install pics, but on the GEN-I , the PCM plug in question was the 3rd plug instead of the 1st, and of course the PCM is on the other side of the engine bay.
The color code for the wire is the same through.