Need wiring help for rpm window switch

[Tim2002GT]

I am going to install an MSD digital window switch and I need some wiring help. Which coil pack wire do I splice off of for the rpm signal. Does it matter which cylinder I use?

thanks
Tim

 

[Stark77]

Shouldn't matter - did you know MSD also makes a digital window switch that taps into your tachometer?

 

[twogts4us]

Doesn't matter which coil you tap into...the particular wire you tap into does though. You want the odd colored wire. Open two of the sets of wires going to 2 different coils and find the common colored wire. That is NOT the wire you want.
Best of luck!

 

[Tim2002GT]

Thanks for the help guys!

Hey Stark77, do you know of a link to that particular window switch?

This is the switch I am installing...
http://store.summitracing.com/partdetail.asp?autofilter=1&part=MSD-8969&N=700+115&autoview=sku

 

[Lasik12]

That switch is awsome. You can use whatever cyl you want. Every COP has one RED and one ODD COLOR/STRIPED wire going to each. get your signal from the ODD COLOR/STRIPED one , then just set the switch to operate off of one cyl and your good to go. and I'm pretty sure that switch can except a tach signal, but the negative from a coil works great. when you start the car it will give a digital readout of you RPM, use the test setting on the dash to compare and make sure its accurate.

 

[Tim2002GT]

Well today I finally got off my arse and installed this thing! I wish I wouldn't have put it off so long. This thing is pretty damn cool! Works flawlessly!

 

[Stark77]

sorry for the late response - my unit is not digital - it uses the RPM chips.