factory tach with 5.3

[XwalkerX]

so i have a tach dash in my 72 c10 that im trying to get to work with the l33 swap. i purchased the dakota digital SGI-8E tach converter since i understand that the tach output from the harness is equivalent to a 4cyl setup.

pic for reference



i ran power and ground to the box.

i ran ground to the tach, the tach power wire i have going to the "normal" port set to 8cyl and also bridged it to the power thats going to the box.

for the "signal in" wire i spliced into the white wire at pin 10 and made sure it was set to 4cyl.

ive tried both the hi and lo voltage positions but still get no movement on the tach.


can anyone give me some insight if im doing something incorrect?


and of course a pic of the truck