Welcome to Camaro Z28!

Welcome to CamaroZ28.Com, the ultimate Source for Camaro enthusiasts! Here you can join over 90,000 Camaro enthusiasts from around the world discussing all things related to Camaros and more. You are currently viewing as a guest which gives you limited access to view discussions

To gain full access to our forums you must register for a free account. As a registered member you will be able to:
  • Participate in over 40 different forums and search/browse from over 5 million posts.
  • Upload your Camaro details to your Garage
  • Post photos, respond to polls and access other special features
  • Gain access to our free marketplace to buy, sell and trade Camaros, parts and more.
All this and much more is available to you absolutely free when you register for an account, so join our community today today!

If you have any problems with the registration process or your account login, please contact support.


Go Back   CamaroZ28.Com Message Board > 1967-2002 F-Body Technical Discussion > General 1967-2002 F-Body Tech
Sign in using an external account
Register Forgot Password?


Reply Post New Thread
 
 
LinkBack Thread Tools Search this Thread Display Modes
Old 09-04-2013, 02:10 PM   #1
Registered User
 
Stephen68's Avatar
 
Join Date: Jul 2013
Location: Milton WV
Posts: 118
Garage
Unhappy Electrical Problem...

guys, i have been messing with this 94 z28 for over a month now. i have went through and straightened up the hacked up wire harness and now i have a question....If my motor and ECU were changed out from the original motor and ECU, but im still using the original key lock cylinder with the VAT chip, will this cause my factory stereo wiring not to work? i have replaced all the wiring under the dash with the proper wires and plugs but my VAT is still jumped so the car will start. What can i do to remedy this?

Thanks!
This ad is not displayed to registered members.
Register your free account today and become a member on CamaroZ28.com!
__________________
Stephen
95 Z-28 ....
Stock LT-1 with A4
Stephen68 is offline   Reply With Quote
Old 09-04-2013, 08:57 PM   #2
Registered User
 
ACE1252's Avatar
 
Join Date: Mar 1999
Location: Kernersville, NC
Posts: 1,900
Re: Electrical Problem...

To my knowledge, the stereo is not linked to the VATS system or the BCM(body control module). Is it not turning on or is it showing locked?

If the car will not start with the VATS "not bypassed" chances are that the cylinder lock contacts are worn out. It's possible that the pellet contacts could be bad, but usually it's the cylinder lock that is the trouble.

To test it, you will need to measure the resistance of the pellet in the key, pull the two wires down from the cylinder lock(disconnect them from anything attached), put the key in the cylinder lock, and see if you can measure the resistance of the key pellet through the wires from the cylinder lock. If not, either the pellet contacts are worn down(in which case a new key is necessary) or the cylinder lock contacts are bad(cylinder lock must be replaced).
__________________
Eric R.- Electrical Engineer - ODU
1996 Blue Z28, 6M
CC503, 1.6 Pro Mags, Kooks, Stock heads, K&N CAI.
Piedmont..8.333@89.07/Farmington..8.389@88.35

Last edited by ACE1252; 09-04-2013 at 09:06 PM.
ACE1252 is offline   Reply With Quote
Old 09-05-2013, 05:09 PM   #3
Super Moderator
 
Injuneer's Avatar
 
Join Date: Nov 1998
Location: Hell was full so they sent me to NJ
Posts: 41,565
Garage
Re: Electrical Problem...

94 doesn't have a BCM. The radio and the power windows are supplied through the RAP module.
__________________
Fred

94 Formula A3+1: 381ci all-forged stroker - Callies Stealth, Oliver 5.85 billet rods, BME nitrous pistons / CNC LT4 heads / Comp Cams custom solid roller / TH400 + GearVendors OD / Strange 12-bolt - 4.11's / 300-shot N2O / Spohn suspension / 6-pt roll bar with integrated SFC's / AutoMeter instrumentation / MoTeC M48Pro engine management system / a few other odds 'n ends. 800HP/800LB-FT at the flywheel.
Injuneer is online now   Reply With Quote
Old 09-06-2013, 02:26 PM   #4
Registered User
 
ACE1252's Avatar
 
Join Date: Mar 1999
Location: Kernersville, NC
Posts: 1,900
Re: Electrical Problem...

I didn't know that. How is VATS handled for that year? I'm under the impression that the BCM deals with the VATS(heck, maybe I'm wrong on that...I'll need to check my schematics). I assumed that for all years but looks like the assume has bit me again.
__________________
Eric R.- Electrical Engineer - ODU
1996 Blue Z28, 6M
CC503, 1.6 Pro Mags, Kooks, Stock heads, K&N CAI.
Piedmont..8.333@89.07/Farmington..8.389@88.35
ACE1252 is offline   Reply With Quote
Old 09-06-2013, 05:17 PM   #5
Super Moderator
 
Injuneer's Avatar
 
Join Date: Nov 1998
Location: Hell was full so they sent me to NJ
Posts: 41,565
Garage
Re: Electrical Problem...

BCM wasn't added until the 1996 model year.

Previous years:

Ignition key turns on theft deterrent module (TDM).

Lock cylinder connects the key pellet to the TDM.

If resistance matches value stored in TDM, the TDM sends the signal that pulls in the theft deterrent relay (TDR), TDM also sends Hz signal to PCM for fuel enable.

The RAP system is the same situation.... separate RAP module up to 1995. BCM incorporated RAP function in 1996.
__________________
Fred

94 Formula A3+1: 381ci all-forged stroker - Callies Stealth, Oliver 5.85 billet rods, BME nitrous pistons / CNC LT4 heads / Comp Cams custom solid roller / TH400 + GearVendors OD / Strange 12-bolt - 4.11's / 300-shot N2O / Spohn suspension / 6-pt roll bar with integrated SFC's / AutoMeter instrumentation / MoTeC M48Pro engine management system / a few other odds 'n ends. 800HP/800LB-FT at the flywheel.
Injuneer is online now   Reply With Quote
Old 09-09-2013, 02:33 PM   #6
Registered User
 
Stephen68's Avatar
 
Join Date: Jul 2013
Location: Milton WV
Posts: 118
Garage
Re: Electrical Problem...

Fred, would u have any idea why there would be no power to my factory stereo wires? i have checked all relays and fuses and they were all good...right now i am having to run the power wires straight into my fuse panel in order for the stereo to work....

Thanks!
__________________
Stephen
95 Z-28 ....
Stock LT-1 with A4
Stephen68 is offline   Reply With Quote
Old 09-09-2013, 02:54 PM   #7
Registered User
 
Join Date: Nov 2007
Posts: 905
Re: Electrical Problem...

Radio is powered from the RAP moule that feeds radio fuse #17 . Same RAP circuit that feeds radio fuse also feeds the power windows, assume thay are working, if so RAP is OK. Are you missing the +12 V to connector C1 pin #9 yellow wire to the radio. Here are two schematics stock radio and Bose Radio. Both use the same yellow wire from fuse 17. Is the radio completly dead, If head is on w/no sound the Bose relay is needed to power on the 3 amplifiers if it's a Bose. http://shbox.com/1/bose_wiring.jpg or http://shbox.com/1/radio_schematic_1996.jpg Here is the RAP http://shbox.com/1/rap_schematic.jpg
__________________
I'm Bob.. 1994 Z28, A4, Stall, CAI, Cam, RR's, 342 rear, LT's , CatBack, Tuned
bobdec is offline   Reply With Quote
Old 09-09-2013, 03:28 PM   #8
Registered User
 
Stephen68's Avatar
 
Join Date: Jul 2013
Location: Milton WV
Posts: 118
Garage
Re: Electrical Problem...

Quote:
Originally Posted by bobdec View Post
Radio is powered from the RAP moule that feeds radio fuse #17 . Same RAP circuit that feeds radio fuse also feeds the power windows, assume thay are working, if so RAP is OK. Are you missing the +12 V to connector C1 pin #9 yellow wire to the radio. Here are two schematics stock radio and Bose Radio. Both use the same yellow wire from fuse 17. Is the radio completly dead, If head is on w/no sound the Bose relay is needed to power on the 3 amplifiers if it's a Bose. http://shbox.com/1/bose_wiring.jpg or http://shbox.com/1/radio_schematic_1996.jpg Here is the RAP http://shbox.com/1/rap_schematic.jpg
bobdec, thanks for the reply...and yes, my power windows do work. i will check for the +12 V yellow wire...Thanks again!
__________________
Stephen
95 Z-28 ....
Stock LT-1 with A4
Stephen68 is offline   Reply With Quote
Old 09-09-2013, 03:28 PM
 
Reply Post New Thread

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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 On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 03:52 PM.


Copyright © 1996-2013 CamaroZ28.Com. All rights reserved.

Garage Plus vBulletin Plugins by Drive Thru Online, Inc.