1990 chevy lumina 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=124176
Printed Date: May 16, 2025 at 2:11 AM
Topic: 1990 chevy lumina tach wire
Posted By: mikey498
Subject: 1990 chevy lumina tach wire
Date Posted: October 29, 2010 at 10:16 AM
Hello,
I have a 1990 Chevy Lumina car and am looking for the tach wire. I know it's a white or WHITE/ purple wire that comes to the coil but when i look at my coil i have only a purple and PURPLE / white wire. Both of these wires don't work. Does anybody have any other suggestions or where the wire comes from or where else i can look?
Thanks in advance,
Mike
Replies:
Posted By: howie ll
Date Posted: October 29, 2010 at 1:05 PM
Is this a single coil?
If so have you tested?
One should read 12volts+ with the ignition, it's the other one you want.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: 91stt
Date Posted: October 29, 2010 at 2:40 PM
The wire should be PURPLE / white.
Is your r/s unit set to tach sensing?
Have you tested the PURPLE / white to confirm that the voltage rises and falls with the increase and decrease of engine rpm, respectively?
-------------
This information is provided only as a reference.
All circuits should be verified with a digital multi-meter prior to making any connections.
Posted By: howie ll
Date Posted: October 29, 2010 at 4:12 PM
To test tach, set your DMM to 20VAC. Black probe to ground, red to suspect wire with the engine running. You should get between 3-5VAC with it increasing slightly as you rev up.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
|