After installing my dakota digital box after the T56 swap, my speedo jumps around at a stop. The instructions said it could be three things:

1: Tach wire too close to speedo wire. I never moved the tach wire, so i doubt this is it.

2: Bad grounds. The box is ground both to the chassis and to one of the speedo wires, and the multimeter says they are both good grounds, so I don't think this is it.

3: Signal wire too close to output wire. I moved them so that the closest they were (other than where they plug into the box) was like a foot, and it still jumped around.

What is causing this?

 

ttt

 

Plug wires or other source causing RFI.

 

Really? Why wouldn't if affect the speedo without the Dakota Digital box?

 

hey im having this same problem, was it ever resolved?

 

Oh man, this was 4 years ago, I really don't remember how I fixed it. I don't even have the car anymore, moved on to a vette. Sorry.

 

its alright, finding the 3 options that it could be in your first post will hopefully help me solve it