90' Chevy Silverado 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=8357
Printed Date: May 14, 2025 at 7:36 PM

Topic: 90' Chevy Silverado tach wire...

Posted By: deadlysyns
Subject: 90' Chevy Silverado tach wire...
Date Posted: January 20, 2003 at 12:38 AM

I am trying to install a remote starter on my friend's Silverado. How ever before I can perform the remote starter the alarm needs to learn the tach wire.

I have located two wires at the ignition coil: Red and White

The white wire is suppose to be the tach wire but every time I try to program the tach wire to the alarm it does not accept it.

Got any idea why?

-Thanks

Replies:

Posted By: gmc4x4
Date Posted: January 20, 2003 at 1:03 AM

i have a 92 sounds like you have the right wire. I was told to solder this connects to make sure it was a good connection.

And just my .02 on the tach learning, i installed one and did the tach learning, but ended up going with voltage, it was more reliable on my truck.

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Posted By: Rich06
Date Posted: January 20, 2003 at 9:18 AM

White, white, white.....Theres even one there taped up near the coil with a female spade (factory test connector) you can plug into. Rich

If you have to toggle switches to put in program mode try doing a little slower.

Posted By: deadlysyns
Date Posted: January 20, 2003 at 11:24 AM

I am using that female spade connector to connect to the alarm.

However when I read the voltage on that wire with the truck running, I get a (+) signal. That wire is suppose to be (-) signal.

Posted By: Rich06
Date Posted: January 20, 2003 at 1:45 PM

The tach signal off the coil is an AC signal. Set meter to AC 10 volt scale. Try unplugging your brain and plugging back in, make sure your ground is good. What brand starter are you using. Rich.

Posted By: deadlysyns
Date Posted: January 28, 2003 at 9:50 PM

I am using a Prestige APS-996 alarm. I am currently using the white (tach) wire but the alarm still cannot learn it.

Can someone list the factory ignition color code for me so I can verify that I am using the correct wires?

-Thanks

Posted By: Velocity Motors
Date Posted: January 28, 2003 at 11:17 PM

Try a PURPLE / WHITE wire otherwise go to an injector ( uncommon colored one )

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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA

Posted By: deadlysyns
Date Posted: January 29, 2003 at 1:42 PM

Do you happen to know the color code for the ignition wires?

-Thanks

Posted By: PLAYER69
Date Posted: January 29, 2003 at 2:01 PM

+12V - Power
Ign - Pink
Heater (accy) - orange
Starter - yellow or purple

Posted By: BNLUIS
Date Posted: January 29, 2003 at 2:30 PM

As Jeff said it try the Violet \ white at the distributor, I did one last week and had problems trying to programm the whit wire. The Violet \ White worked perfect. test wires.

Luis

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