Water temp and Tach Not Working

[coastsidekid]

Yes its the right signal for the ecm. And you take the 4k output from the ecm and tie into a light blue with a black tracer wire for the speedo connection. The easiest place is behind the glove box where it comes out of the drac box.

Not sure what wire the 4k output is but is that going to be my green speedo wire from the lq4 computer? also can you explain the black tracer wire? i have a light blue/black wire from my white box.
Thanks bud

[danger_ranger83]

Not sure what wire the 4k output is but is that going to be my green speedo wire from the lq4 computer? also can you explain the black tracer wire? i have a light blue/black wire from my white box.
Thanks bud

the 4k is just how the computer reads the signal from the VSS....i dont know anything about ur truck so i cant help u with the rest..sorry

[92 6.0]

Yeah the blue with a black stripe is the right one.