tach wire

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wgasca

Member - Posts: 29

Joined: December 09, 2004

Location: United States

Posted: January 17, 2005 at 9:13 PM / IP Logged

How do you test the tach wire to make sure its the right one?

Hymer

Silver - Posts: 695

Joined: November 20, 2004

Location: United States

Posted: January 17, 2005 at 9:16 PM / IP Logged

Look for an ac voltage It should increase and decrease with the vehicles rpm... what car?

Tire Proz Stillwater Mn

High End Restyling and Comlete Repair

Bnluis

Silver - Posts: 578

Joined: December 24, 2002

Location: New York, United States

Posted: January 17, 2005 at 9:17 PM / IP Logged

How to find a tachometer wire with your multimeter:

1. Set to ACV or AC voltage (12V or 20V is fine).

2. Attach the (-) probe of the meter to chassis ground.

3. Start and run the vehicle.

4. Probe the wire you suspect of being the tachometer wire with the red probe of the meter.

5. If this is the correct wire the meter will read between 1V and 6V.

Luis

Sound Waves

Is up to the installer to test all wires with a DMM whenever possible.

Jschult3

Copper - Posts: 106

Joined: December 25, 2004

Location: United States

Posted: January 17, 2005 at 10:23 PM / IP Logged

Some cars will read a little different than others. You'll know you have it when the voltage increases as you rev up the engine. Then as the rev's come down so should the AC voltage.

Should show 0 volts AV(VAC) whe the car engine is off.

If you cannot find the tach wire specified in the diagram or it's just inconvenient to get to you should be able to teach the unit the TACH from a few other place like fuel injector wires, or near your transmission control module, if you have one.

What type of car as HYMER said?

Jeff

Always Verify Wire information before Connecting! Just a Darn Good DIY'R

wgasca

Member - Posts: 29

Joined: December 09, 2004

Location: United States

Posted: January 17, 2005 at 10:54 PM / IP Logged

its a 01 honda accord lx 4 door

thepencil

Gold - Posts: 1,526

Joined: December 16, 2002

Location: Canada

Posted: January 18, 2005 at 9:55 AM / IP Logged

HONDA, ACCORD, 2001, Tachometer

The tach test connector is located behind the battery on the 4 cylinder, and on a bracket attached to the drivers side strut tower on the 6 cylinder motor. The tach test connector is a white 2 pin connector, and may be covered by a black rubber boot.

Be careful whose advice you buy, but be patient with those who supply it. tach wire - Last Post -- posted image.

johnnydi77

Copper - Posts: 54

Joined: May 17, 2004

Location: United States

Posted: January 18, 2005 at 6:43 PM / IP Logged

The test connector most likely will have blue tape on it.

John J. DiStefano Jr.

wgasca

Member - Posts: 29

Joined: December 09, 2004

Location: United States

Posted: January 18, 2005 at 7:19 PM / IP Logged

i found the wire but when i rev the engine the voltage decreases and when i let go it goes back up. do i have my dmm set wrong?

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tach wire

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