Search Everywhere Threads This forum This thread. Search titles only. Everywhere Threads This forum This thread. Search forums. Install the app. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser. Thread starter jrbaldwin Start date Apr 22, Nov 5, 19 Washington. No starter signal at starter relay but when jump relay will turn over but not start.
No check engine light. When leave key in on position for a while security lights come on Dash lights, head light, heater, radio, turn signal, windows, wipers and everthing seems to work. Normal code reader cannot comunicate with or read codes.
Snap-On scanner can read codes but only recognizes 10 systems and 8 codes with cleared and return. Snap-On scanner can run run function test of lights, windows, power down, ect in Bode Control Module.
All fuses in both fuse boxes look good. Reconized Modules 1. Anti-lock Brakes - 0 codes 2. Door Module - Drive - 0 codes 5. Instrument Panel Cluster - 0 codes 7. Lift Gate - 0codes 8.
Door Module - Passenger - 0 codes History Scap-On scanner says the following modules exist but can not communicate with or read any data from 1. Engine 2. Radio - Aftermarket 3.
Seat module - driver 4. Theft Deterrent 5. Transmission Past History Has a occasional starting issue where would not start unless disconnected battery for 10 minutes then would start properly again for a week or two.
No codes found with normal code reader. Talked to Chevy Dealer who said needed to be towed in while in no start condition to read codes and diagnosis. Had spare BCM and had dealer program to car. Need a step by step test to identify the electrical serial buss issue causes or eliminate possible causes. Searched but not much information found other than disconnect modules one at a time to check if one is going bad and corrupting the serial bus.
Thinking first step is to test all fuses with multi-meter. Then inspecting all wiring in engine compartment for mouse damage. Had a mouse build nest under air cleaner and chew thru some injection wiring last year.
Thanks, Jim. Last edited: Apr 22, Chickenhawk Hobbyist. Dec 6, Have you replaced your ignition switch yet? Yes changed about months ago. Carry a spare so will change to eliminate as a possible issue. Jun 16, 1, kanata. Your best bet would be to check all fuses with a meter as opposed to your eyes Also pulled and looked at fuse elements which looked good. Going to check each fuse with multi-meter. Can check voltages with fuses in place as have small test pads on top. Can check both sides on the fuses for voltages.
Want to do things in an step by step manner keeping a check list of completed items. Sorry out getting lag bolts to secure the wifes new green house. Yes no "check engine light" with the key turned on but comes on during the "all lights test" at the start of "key on" sequence. But will check again to confirm all lights test. Yes all instrument cluster warning lights on during "all lights test" at the start of "key on" sequence.
DocBrown Hobbyist. Dec 8, First thing, start with the basics. Test your battery. After sitting for at least 10 minutes, it should be showing Any less and you probably need a new battery. Legacy detachable video player. Hooked it up, all functions working no sound. Any advice appreciated.
Your email address will not be published. Chico, thanks for the Chevrolet Tahoe stereo wiring information contribution! Let me go a head and clear this up once and for all!!! Leave a Reply Cancel reply Your email address will not be published.
Follow Us. If your radio does not indicate a set of numbers on the display using this procedure and is a up, the vehicles radio MAY have an RDS radio. About the theftlock RDS radio system. The theft deterrent system now utilizes class 2 serial data to determine if the radio is in the authorized vehicle.
Each time the radio receives accessory power from the ignition, it compares the VIN information it has stored to the VIN information received from a module on the class 2 serial data circuit responsible for transmitting that information.
Once this occurs the radio will not respond to operations and become inoperative. The following conditions will enable radio lock:. A radio is installed from another vehicle. A module which communicates on the class 2 serial data circuit which supplies VIN information to the radio is replaced and not properly setup with the correct VIN information for that vehicle.
To unlock radio you will need access to a GM scan tool. Back to General Motors radio unlock code retrieval. Section 1. Step 2 - Retrieve radio serial. The radio display changes from LOC to a three-digit number. Write this number down. You will then have fifteen seconds max before the next step must be performed.
The radio display changes to another three-digit number.
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