Msd Dis-4

[gn-geoff]

I have the MSD box on my car ,I was woundering if any one could let me know how the two step rev switch works.The light blue wire coming out of the box.

Thanks Geoff

 

[gn-geoff]

ttt.Any help would be great.

Geoff

 

[Underboost]

Blue wire goes to the trans brake. I believe it will also work with the line lock.

 

[d90dan]

From what I can recall, the old style box requires a gnd to the blu wire. The new box requires a 12v input.

 

[Underboost]

I have the new style rotary dial.

The older version has the the dip switches.

Good point Dan