Trying to install a speed cal on my 98 gt. Powered it from the cig lighter and wired it in correctly to the vss. Speedometer just stays at zero. If anyone ahs ran into this before or has experience with these any help or advice is appreciated. Thanks

 

Does it blink read when your moving. If it does then you need to make sure the code you have is correct. I had to call dallas speed myself and get a new code.

 

No i got mine form dallas also but it is dip switches and it shows you how to set them for different gears right on one of there websites. plus there is no red light on it? I guess i will call them thank you