I know the tach wire sends out voltage when the engine rpms are increased. My question is I have a multi meter, and I would like to test the tach wire under the hood, and the one comming from the ecu to make sure I have the right wire. What do I set my multi meter to? I want to make sure I have the right settings so I dont fry the multi meter, and or something else.
I need to make sure I have the right wire because I am going to install a tach on my 2001 ex. I accidently wrecked the tach needle on my guage cluster while removing some old indiglow guages

Thanks guys!

Just ask a honda dealer ship, i don't think that it will send that much voltage.

yeah i got the right one, the tach i bought works great. just need to hard wire it in.

the tach wire is right next to the battery a blue wire with a goofy connecter on it. you'll know exactly what im talkin about when u see it. i installed for circuit city and thats what they (and wire majic) suggest.