How to hook tach sensor wire?

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=40322
Printed Date: May 14, 2025 at 7:28 PM

Topic: How to hook tach sensor wire?

Posted By: ivanca
Subject: How to hook tach sensor wire?
Date Posted: October 05, 2004 at 12:43 PM

I am not really know how to hook up the tach sensor wire for remote starter.

I read many remote starter's manual. There are 2 ways for detecting the tach as below.

posted_image

For example, PONTIAC TRANSPORT 1990-1993

TACH SENSOR WHITE at IGNITION COIL MODULE
Which detecting way is better? Connect it drectly or just round 10 loops on it?
I am new installer. Sorry for asking so stupid questions.

Replies:

Posted By: ivanca
Date Posted: October 05, 2004 at 12:46 PM

Images link can not be displayed here. i have to upload them again here

WAY 1:

posted_image

WAY2:

posted_image

Posted By: mo12v
Date Posted: October 05, 2004 at 3:36 PM

R U using the WRAP around Plug or coil method or can U use a direct TACH connection?

U can also hook it up here:

Tach Signal

WHITE

IGNITION MODULE OR AT E.C.M./P.C.M. *

* Base Models Are Throttle Body Injected
also
1992 - 1993 3.1L Passenger Dash Black 32 Pin connector, Position D-4
1992 - 1993 3.1L Passenger Dash Black 32 Pin connector at PCM, Position C-9

-------------
MO

Don't Learn from Others Mistakes
You Might Be the One That Knows.

Posted By: Teken
Date Posted: October 05, 2004 at 4:08 PM

I dont think his picture is big enough. Perhaps it could be a little bigger so I can see it. posted_image

Regards

EVIL Teken . . .

Posted By: ivanca
Date Posted: October 05, 2004 at 6:49 PM

I work for a company selling a lot of alarms. So there are many ways to detect the engine starting. But whatever, just give above 4V to that wire on alarm when engine is starting, it will work well. But just not really know which way is the best. For some vehicles, round 5 loops is not working though the manual says it does.

Some alarm's manual says it should connect to engine oil pressure sensor. But it is hard to locate the engine oil pressure sensor wire. Most vehicle's installation wiring sheet only provides the "TACH SENSOR" wire. For this case, mostly, I connect it directly to the tach wire, it works well. Isn't high volt? But the alarm didn't burn. Why? But if I round 10 loops on the tach wire, it wouldn't work. Why?

mo12v] wrote:

/p>
R U using the WRAP around Plug or coil method or can U use a direct TACH connection?

U can also hook it up here:
Tach Signal WHITE IGNITION MODULE OR AT E.C.M./P.C.M. *
* Base Models Are Throttle Body Injected
also
1992 - 1993 3.1L Passenger Dash Black 32 Pin connector, Position D-4
1992 - 1993 3.1L Passenger Dash Black 32 Pin connector at PCM, Position C-9