Factory tach wiring questions.
#1
Factory tach wiring questions.
I have a question about the factory tach.
1. When adding the tach cluster to a truck that didn't have a tach originally, do I have to run new wires to the tach, or are they already in the harness????
In the factory manual, it says the same tach works for 6 or 8 cylinder engines. An extra wire is hooked up on the 8 cylinder tach to calibrate it. Very interesting!
I read the tach tips in the tech section, it was very helpful! Thanks, Scott
1. When adding the tach cluster to a truck that didn't have a tach originally, do I have to run new wires to the tach, or are they already in the harness????
In the factory manual, it says the same tach works for 6 or 8 cylinder engines. An extra wire is hooked up on the 8 cylinder tach to calibrate it. Very interesting!
I read the tach tips in the tech section, it was very helpful! Thanks, Scott
#3
All you ever wanted to know about factory tach's, and then some:
https://www.ford-trucks.com/forums/9...-question.html
https://www.ford-trucks.com/forums/9...-question.html
#4
#6
Everything should work as long as your factory wiring is working properly. If not, it's possible to wire the tach yourself, pretty much just like you'd wire up an aftermarket tach.
As you can read in that topic, I had quite a bit of trouble getting my tach to work. I wasn't getting power to the tach through the circuit film, so I ended up having to run a new wire to the B post (main power terminal on the tach) that's on with the key in ACC or RUN. Worked a charm, all the other factory wiring handled everything.
As you can read in that topic, I had quite a bit of trouble getting my tach to work. I wasn't getting power to the tach through the circuit film, so I ended up having to run a new wire to the B post (main power terminal on the tach) that's on with the key in ACC or RUN. Worked a charm, all the other factory wiring handled everything.
#7
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