I have a 1997 Ranger (2.3L) that I'm going to be putting a tachometer in. Could someone tell me where each wire goes? I've Googled it, but the instructions I've seen so far are rather vague. Thanks to all that'll assist me.

 

Welcome to the forum

Why not just get an instrument cluster with tach built in, 1996-2003 is plug and play, from a 4 or 6 cylinder engine doesn't matter, just unplug 1 ground wire

Like this one: https://www.ebay.ca/itm/96-97-Ford-E...IAAOSwNhNdytzK

All instrument clusters have the tach wire installed on the connector, the tach itself in the cluster was the option

And you will need to pull the cluster out in any case to get to the tach wire for that added tach and the back light

But up to you

To your question
Pull out the instrument cluster
On connector C214 pin 15 will be a tan/yellow wire, this is the tach signal from the computer, splice into this wire for tach signal
On same connector pin 8 will be a red/black wire, this is for back lights in the dash, that dim or brighten using the dimmer wheel, splice into this wire for the add-on tachs back light

The tach will also need a Ground and key on 12volt wire
You can use pin 7 on above connector for the ground, Black wire
And pin 13 for the key on power, red/yellow wire

But I would really just get the cluster with built in tach