Just looking this up in the wiring diags to see if my tacho is RVI or rVC. On sheet 7, RHSTRG. S2, 3500 C chassis,or 3500S D chassis.....there are 2 items marked 34. The top most one looks like the tacho, and should be numbered 37. Where most earlier diagrams show wiring feed through coil and then through tacho to dizzy, sheet 7 shows one coil lead going to dizzy, and a separate wire going to tacho ('34', s/b '37'), with a separate power lead to the tacho, and also out to earth. My reading of RVC vs RVI says this makes these tachos RVC, ie voltage pulse triggered, not current triggered.
Comments ?