so i know this has been asked a million times, and i searched and searched, but never really got an answer. im wondering if i have to wire the new cluster in my 91 dx, which didnt have a tacch on the old cluster, but has one on the new one. do i need to manually wire the tach, or is it going to work when i plug the cluster in? any help would be apreciated. thanks guys!

 

plug 'n play