2004 silverado databus
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=44067
Printed Date: May 03, 2024 at 5:57 PM
Topic: 2004 silverado databus
Posted By: woosh
Subject: 2004 silverado databus
Date Posted: November 29, 2004 at 6:19 PM
Does anyone know if it is OK to install a PLDATA and a GMDL4 databus module together on the data wire and hook them both to the same ground output of my VALET 562T? I just wonder if 2 modules on the same ground output would be to much of a load for the remote car starter. Is it also possible to hook a third module such as WINDATA to the databus wire and have all three modules connected at the same point to the databus?
Replies:
Posted By: NowYaKnow
Date Posted: November 29, 2004 at 7:48 PM
2 modules I don't think would be a problem, 3 may be pushing it a little bit as that is a low current output. Those modules probably don't draw much at all on the ground out, but you may want to put your meter on it and measure to be safe. Regardless, you want to diode isolate ALL 3 modules. And yes you can tap all the wires going to the same data wire together.
Mike
Posted By: Velocity Motors
Date Posted: November 29, 2004 at 8:20 PM
Personally I would boost the ground when running wire with a relay to ensure proper ground on the modules. This is the life line of the modules to perform properly so if you increase the ground, you will ensure proper working modules.
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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: arctic
Date Posted: November 29, 2004 at 8:37 PM
yeah... throwing a relay in there will take a couple of extra minutes and cost much less than having to replace a gm module.
Posted By: woosh
Date Posted: November 29, 2004 at 9:19 PM
When you say "diode isolate all three modules", do you install the diodes in the wire going to the data-bus?
Posted By: Velocity Motors
Date Posted: November 29, 2004 at 11:19 PM
No need to diode isolate the ground when running wires if your using a relay to send a ground to them If you didn't use a relay and only used the ground out when running wire from the RS, then I would diode isolate.
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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: link123
Date Posted: November 30, 2004 at 10:26 AM
Velocity, Can you show us an example of an "boost the ground " relay?
Posted By: kgerry
Date Posted: November 30, 2004 at 1:42 PM
the same as using a relay for trunk release...you take a low current negative from the unit ( whether it's trunk release or ground out while running ) and use a relay to supply "true" or "hard" ground.....
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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: spl-Hz
Date Posted: November 30, 2004 at 2:07 PM
Your pin configuration would be as follows. #86 12v fused #85 ground out from remote start #87 chassis ground #30 output to data modules
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