Go Back   Corvette Forum > General Corvette Topics > Audio/Electronics
Sign in using an external account
Register Forgot Password?
Register Search Today's Posts Mark Forums Read FAQ Vendor Directory
Search
Audio/Electronics
Stereo System Installation Info, Amplifiers, Subwoofers, Radar Detectors, Police Scanners, and CB Radios for the Corvette Sponsored by
Optima Batteries

Welcome to Corvetteforum.com!
Welcome to Corvetteforum.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Corvetteforum.com today!


Corvette Store
 
 
C7 Parts & Accessories
C6 Parts & Accessories
C5 Parts & Accessories
C4 Parts & Accessories
C3 Parts & Accessories
C2 Parts & Accessories
C1 Parts & Accessories
Wheels & Tires
Sponsored Ads
 
 
Vendor Directory
  
Reply
 
 
 
 
Thread Tools Search this Thread
Old 10-10-2007, 12:07 PM   #1
black_771
CF Senior Member
 
black_771's Avatar
 
Member Since: Jul 2007
Location: Mount Vernon Indiana
Default Very Basic HOWTO - Get rid of "SYS" for aftermarket stereo

This may be somewhere around here already, but I finally fixed the flashing SYS light caused by my aftermarket stereo. All told it was about a $5 project.

Supplies needed:
Heat shrink tubing that fit over 20 gauge wire

One red Male quick disconnect (yes this one is blue, you need the red one)
Click the image to open in full size.

One blue "T Tap"
Click the image to open in full size.

Two "1k, 1/2 Watt" resistors (Radio Shack)



Assembly
I did the easiest thing I could fine, but it still required cutting the factory harness.

I first took the red quick disconnect and the two resistors and crimped them together. The red disconnect is for 20 gauge wire but the leads on the resistor are much thinner then that so both leads will fit inside the crimp of the disconnect with no problem. Both resistor should be sticking out of the disconnect when finished like a 'Y'.

I then cut the GRAY/BLACK STRIPE and the PURPLE/WHITE STRIPE wires from the factory harness and stripped the ends about 1/2 inch. I put 1 piece heat shrink tubing over each of the wires. The tubing should be long enough to cover the splice we are about to make plus resistor completely all the way to the crimp on the disconnect. This makes it a little nicer and less likely to short out something.

Then twist one wire to one of the resistors and the other wire to the other resistor. You can solder if you want, but I don't think a butt connector will crimp well to the thin resistor lead. I just twisted them together.

I pushed the heat shrink tubing over each assembly from the wire splice all the way up to the end of the disconnect and heated it. I think this creates a pretty good connection.

Last is to crimp the "T Tap" onto the red power lead. Make sure the tap is within about a foot of the radio. The wires that you spliced eariler aren't very long. Anyway this is an ignition switched power connection. Once you crimp the tap into place just plug the disconnect into the T-Tap and you are done.

Hopefully there is no SYS light after this.

Last edited by black_771; 10-10-2007 at 12:11 PM.
black_771 is offline   Reply With Quote
Old 10-10-2007, 12:19 PM   #2
Vis Croceus
CF Senior Member
 
Vis Croceus's Avatar
 
Member Since: Apr 2003
Location: Pittsburgh
Default

See C4 audio FAQ.
Vis Croceus is offline   Reply With Quote
Old 10-10-2007, 12:33 PM   #3
black_771
CF Senior Member
 
black_771's Avatar
 
Member Since: Jul 2007
Location: Mount Vernon Indiana
Default

Quote:
Originally Posted by Vis Croceus View Post
See C4 audio FAQ.
Read it. Technical diagrams work for some, step by step works for others.

If this is helpful, then great. If it gets buried, that's fine too.
black_771 is offline   Reply With Quote
Old 02-10-2014, 12:29 AM   #4
Cutolds350
Junior Member
 
Member Since: Feb 2014
Default SYS Light After Radio Install

Quote:
Originally Posted by black_771 View Post
This may be somewhere around here already, but I finally fixed the flashing SYS light caused by my aftermarket stereo. All told it was about a $5 project.

Supplies needed:
Heat shrink tubing that fit over 20 gauge wire

One red Male quick disconnect (yes this one is blue, you need the red one)
Click the image to open in full size.

One blue "T Tap"
Click the image to open in full size.

Two "1k, 1/2 Watt" resistors (Radio Shack)



Assembly
I did the easiest thing I could fine, but it still required cutting the factory harness.

I first took the red quick disconnect and the two resistors and crimped them together. The red disconnect is for 20 gauge wire but the leads on the resistor are much thinner then that so both leads will fit inside the crimp of the disconnect with no problem. Both resistor should be sticking out of the disconnect when finished like a 'Y'.

I then cut the GRAY/BLACK STRIPE and the PURPLE/WHITE STRIPE wires from the factory harness and stripped the ends about 1/2 inch. I put 1 piece heat shrink tubing over each of the wires. The tubing should be long enough to cover the splice we are about to make plus resistor completely all the way to the crimp on the disconnect. This makes it a little nicer and less likely to short out something.

Then twist one wire to one of the resistors and the other wire to the other resistor. You can solder if you want, but I don't think a butt connector will crimp well to the thin resistor lead. I just twisted them together.

I pushed the heat shrink tubing over each assembly from the wire splice all the way up to the end of the disconnect and heated it. I think this creates a pretty good connection.

Last is to crimp the "T Tap" onto the red power lead. Make sure the tap is within about a foot of the radio. The wires that you spliced eariler aren't very long. Anyway this is an ignition switched power connection. Once you crimp the tap into place just plug the disconnect into the T-Tap and you are done.

Hopefully there is no SYS light after this.
I know its been some time since you posted this, but I am in the process of an aftermarket radio installation. Although I have not completed the install I would like to implement the fix that you posted. Only problem is i do not have a red wire on in the wiring harness behind the radio. I found the purple/white and gray/black wires. Also the unit that I'm installing has an illumination wire. I wonder if the this wire should be connected and take care of the dreaded SYS light? Here is a picture of the two connectors in the dash.
Attached Images
  
Cutolds350 is offline   Reply With Quote
Old 02-10-2014, 05:55 PM   #5
Klaus-96
2008 A6/Z51/NPP Coupe
Support Corvetteforum!
 
Klaus-96's Avatar
 
Member Since: Jul 2005
Location: Atlanta GA
Default Before you begin...

What A/C controller do you have? Manual or Automatic? If Automatic, you may not need the resistor fix.
__________________


2008 Machine Silver A6/3LT/Z51/NPP Coupe
Klaus-96 is offline   Reply With Quote
Old 02-10-2014, 07:26 PM   #6
Cutolds350
Junior Member
 
Member Since: Feb 2014
Default

Quote:
Originally Posted by Klaus-96 View Post
What A/C controller do you have? Manual or Automatic? If Automatic, you may not need the resistor fix.
I've got the automatic climate controller.
Cutolds350 is offline   Reply With Quote
Old 02-11-2014, 01:19 PM   #7
Klaus-96
2008 A6/Z51/NPP Coupe
Support Corvetteforum!
 
Klaus-96's Avatar
 
Member Since: Jul 2005
Location: Atlanta GA
Default

Quote:
Originally Posted by Cutolds350 View Post
I've got the automatic climate controller.
I would try it without the resistor fix, as long as the digital display is working properly in the automatic A/C control.

I have owned 2 separate '96 Corvettes. The first was a base model with the manual A/C. When I replaced the radio with an aftermarket model, the sys warning was a problem and required the resistor fix.

I later owned a '96 CE fully loaded, with the automatic A/C. When I replaced the radio with an aftermarket unit, it did NOT require the resistor fix.

The sys warning displays because the computer does not see a load on the illumination circuit. If you study the wiring diagrams, the radio AND the automatic A/C controller both draw off that circuit. The manual A/C controller does not. Therefore, because the automatic A/C controller is still drawing/completing the illumination circuit, the sys warning does not appear. At least that is my theory.

Why don't you test it before the install. With the radio disconnected, start the car and turn on your headlights. Set the dimmer control in the center position. Give it a couple of minutes. Do you get the sys warning?
__________________


2008 Machine Silver A6/3LT/Z51/NPP Coupe

Last edited by Klaus-96; 02-11-2014 at 01:24 PM. Reason: Added line.
Klaus-96 is offline   Reply With Quote
Old 02-11-2014, 09:14 PM   #8
Cutolds350
Junior Member
 
Member Since: Feb 2014
Default

Quote:
Originally Posted by Klaus-96 View Post
I would try it without the resistor fix, as long as the digital display is working properly in the automatic A/C control.

I have owned 2 separate '96 Corvettes. The first was a base model with the manual A/C. When I replaced the radio with an aftermarket model, the sys warning was a problem and required the resistor fix.

I later owned a '96 CE fully loaded, with the automatic A/C. When I replaced the radio with an aftermarket unit, it did NOT require the resistor fix.

The sys warning displays because the computer does not see a load on the illumination circuit. If you study the wiring diagrams, the radio AND the automatic A/C controller both draw off that circuit. The manual A/C controller does not. Therefore, because the automatic A/C controller is still drawing/completing the illumination circuit, the sys warning does not appear. At least that is my theory.

Why don't you test it before the install. With the radio disconnected, start the car and turn on your headlights. Set the dimmer control in the center position. Give it a couple of minutes. Do you get the sys warning?
Thanks Klaus! I will give it a try and let you know.
Cutolds350 is offline   Reply With Quote
Old 02-11-2014, 09:14 PM
 
Go Back   Corvette Forum > General Corvette Topics > Audio/Electronics
Reload this Page Very Basic HOWTO - Get rid of "SYS" for aftermarket stereo
 
 
 
Reply

Tags
aftermarket, c3, corvette, resistor, stereo, sys


Thread Tools Search this Thread
Search this Thread:

Click for Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
DIY: Laguna Switch for NPP (C6) ImHuntingWabbits Autocrossing & Roadracing 4 07-27-2014 05:28 PM
Tech question for FI, espically Maggie guys Lt. Dan M. C5 Forced Induction/Nitrous 3 01-05-2014 06:20 PM
Valentine Radar Detector powered by mirror maxvalley C5 General 16 08-12-2011 08:33 PM
resistors..Locations of wires? Jamesnns C4 Tech/Performance 8 02-08-2010 07:46 AM


All times are GMT -4. The time now is 03:52 AM.


Emails & Password Backup