If you read the latest post in Lenko's sticky you will have an idea what i'm trying to do. Anyways I was thinking.... What if someone was to use the tracker harness but connect a buzzer/aftermarket chime unit to it. If I recall the BCM only sends information to the radio, so if it applies to voltage the buzzer when it needs to (headlights on) then it will sound the buzzer. So the positive terminal of the buzzer would be the data wire and the negative would be grounded. What do you guys think? To me it seems a little too good to be true, but this is an idea.
Totally wrong... sorry Jacob. The Class 2 wire is a data line.. it's like a signal from your computer. Imagine hooking a buzzer up to your USB port... probably have a similar effect.
There simply isn't an easy way (using that wire) to make chimes go. You'd need to build a module that understands Class 2 protocol (and it's propriatory... so you'd have to pay GM for the coding).. then wire it up.
It's like all the people who try to reinvent the rear disc brake conversion at a cheaper cost.. it ain't gonna happen.
If you really want to use a plain old buzzer... make a simple logic circuit that watches if the door is open and the key is in (there's wires for both of those).. or... lights on and door open... much simpler.
<a href="http://www.lenkorules.com/"><img src="http://s93165229.onlinehome.us/images/zm/sig/LRDCsig3.jpg"></a>
The biggest thing about that is the class 2 data bus isn't only used between the two devices on each side of the wire. The entire car uses the class 2 bus to talk, the ECU talks to the TCU, BCM, Cluster, Windshield Wipers, HVAC, Airbags, Seatbelts, etc on that same wire. The signal also isn't a voltage as John said, its an analog signal. Putting any device on it that doesn't relay will cause the network to break up, and at the very least the downstream device would become inoperable.
4cyltuner.com - Information Source For 4 Cylinder Tuners
Buy stuff from CarCustoms Ebay! Won't be disappointed!
bah i tried, my solutions in the sticky seem to be good options though.
BTW Lenko.. I was looking at this comment you made:
Quote:
If you really want to use a plain old buzzer... make a simple logic circuit that watches if the door is open and the key is in (there's wires for both of those).. or... lights on and door open... much simpler.
Wouldn't the 95-99 Chime unit seperated from the convenience centre do the same thing? or would it interfere with the class 2? I know that all of the terminals joining the wire colors (ex. at the headlight switch) are the same from 95-05.
It probably would work.. certainly wouldn't interfere with the class 2 wiring... but it may screw up the body control module unless you isolate it using some diodes on certain circuits. I haven't really looked over the schematics but it SHOULD work just fine. Unless you get it cheap from a wrecker, it's more expensive (new from GM) than the Ventura Technologies module.
<a href="http://www.lenkorules.com/"><img src="http://s93165229.onlinehome.us/images/zm/sig/LRDCsig3.jpg"></a>
