1990 Lesabre tach 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=85254
Printed Date: May 23, 2024 at 3:32 PM
Topic: 1990 Lesabre tach wire
Posted By: BrianB1975
Subject: 1990 Lesabre tach wire
Date Posted: November 06, 2006 at 8:06 PM
Hi,
I am putting a remote start system into my 1990 Buick Lesabre (FWD) 3.8 V6. I know the wiring diagram says that the tach wire is located at the coil pack, but is there any one that can tell me a better place to tap into the Tach wire, rather than the coil pack or injectors. Mabey the ECM (if so, what color wire would that be) or any other place that I can tap into it where I do not have to run the wire all over the engine compartment.
Any help at all is greatly appreciated.
Thanks,
Brian
Replies:
Posted By: rfwave
Date Posted: November 06, 2006 at 8:45 PM
Use tachless [ voltage sensing] .
Posted By: sparkie
Date Posted: November 07, 2006 at 12:25 PM
On the passenger side of the firewall you will see a black plastic cover. Near the middle of this cover is a semi round hole with a loomed harness coming out if it. The harness is about 2 inches wide. This is the harness that goes to the motor. Inside the harness you will find a violet/white wire. This is the tach wire. Check it with a meter first to confirm it. You should get a varying AC voltage reading of between 1 and 9 volts. it varies with RPM.
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sparky
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