Hi, I have checked around to see if someone has already asked this question, but it was for later trucks, and not the same cluster I have in my truck. So in my 93 LC and in my FJ Cruiser I know the factory used a harness that had multiple options and just capped off the plugs that were not being used. For example in my 93 I installed the Center Diff Lock switch by popping off a blank plate fishing around in the dash and finding the plug with a block off cover and plugging in the new switch.

So if I find an SR5 cluster with the tach, will it plug into the existing harness behind the dash or will I have to do a bunch of stuff to get it to work? I would like to have the factory tach, but not if it going to harder than adding an aftermarket one.

Thanks.