97 chevy blazer CS-2011RS
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=5688
Printed Date: June 04, 2024 at 10:34 AM
Topic: 97 chevy blazer CS-2011RS
Posted By: skerr
Subject: 97 chevy blazer CS-2011RS
Date Posted: November 20, 2002 at 11:36 AM
If I hook both the Dome light illumination wire and the - door trigger wire to the same white wire for the under dash light , my dome light stays on for about 30 seconds after you close the doors won't this set off the alarm?
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Shawn
Replies:
Posted By: PLAYER69
Date Posted: November 20, 2002 at 5:17 PM
you need to isolate the 2 with a diode. If you use the wire at the switch it should not be affected by the dome light delay.
Posted By: skerr
Date Posted: November 21, 2002 at 7:06 AM
How do you isolate with diodes if one wire is an input and one wire is an output both negative hooked to the same wire.
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Shawn
Posted By: jrilla
Date Posted: November 21, 2002 at 7:33 AM
Negative current flows through a diode from the band (cathode) to the other side (anode), so on your door trigger input wire face the band away from the alarm brain, and for the illuminated entry output, face the band toward the alarm brain. This will solve the issue of setting off your alarm like Player69 said.
 However, If you want to shut your light off immediatley just like they do when you lock your doors with the factory remote, try this: if you want you can use your lock wire to pulse the wire that turns off your dome light. This is very easy with neg door locks like I have, but you would need to use a realy since you have positive door locks. You would also need to diode isolate this wire with the band facing the lock wire or the relay in your case, or maybe not, I guess I can't really think of a scenario that using a diode would prevent, but it wouldn't hurt. You definately need one with neg door locks though so the dome light turning on doesn't lock your doors. ------------- J Rilla
Owner/Installer
Posted By: skerr
Date Posted: November 21, 2002 at 7:53 AM
Is it just me or does this still not make any sense. If I hooked it up the this way the negative out put of the illuminated entry would still trigger the alarm.
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Shawn
Posted By: PLAYER69
Date Posted: November 21, 2002 at 1:55 PM
It will work if wired properly. First you need to take some time to understand how a diode works.
Posted By: skerr
Date Posted: November 21, 2002 at 2:13 PM
How much is there to understand about diodes(power only flows one direction). Now stop and think about this for a second, I will be hooking the (-) trigger input wire to the white (-) dome light wire with a diode(cathode on alarm side) and hooking the (-) dome light illumination output to the same white wire with a diode(anode on alarm side). Ok my vehicles dome light stays on 30sec after you shut the door, so if I arm my alarm before the light goes out it will bypass the door trigger because even with a diode the (-) input trigger wire will show ground to the alarm. ------------- Shawn
Posted By: PLAYER69
Date Posted: November 21, 2002 at 3:20 PM
BUT, you are not hooking the wire up to the light, you are hooking it up to the switch. There will not be gound present at that wire during the 30 second delay. Even if there is, you can still add a diode to prevent it from feeding back to the switch and the alarm.
Posted By: PLAYER69
Date Posted: November 21, 2002 at 3:25 PM
You will also have to go to the passenger door and isolate as well. Is this a 4 door or 2 door?
Posted By: PLAYER69
Date Posted: November 21, 2002 at 3:28 PM
According to my information, there is a TBC module mounted to the heater unit or on the right side of the steering column. At this module: drivers door is tan - at B4 possition.Passenger door (and back doors) is orange at B2 position. I don't know how acurate this is as this is for a 98 not a 87.
Posted By: PLAYER69
Date Posted: November 21, 2002 at 3:41 PM
My memory is so terrible.
What I would like to know is, on this truck is the door switch mounted on the side of the dash like the 95-98 chev trucks? In other words, can you hold it closed with your finger? If so, pop it out, push from under the dash out. It will be hard to get you hand up there but you should be able to manage.
Now, if my memory serves me, there should be 3 wires. One will be black (ground) One will be tan (this turns the dome lights on) And I think there is a third (Purple??) . I think the third wire is common between all the doors and is independent of the dome lights. In other words, you could hook your alarm triger to it and your dome light output to the tan wire and have no problems. Let me know how you make out.
Posted By: skerr
Date Posted: November 22, 2002 at 5:59 AM
Yes there is a switch mounted to the dash but it doesn't controll the dome light at all, just a buzzer. It is a 4-door s-10 blazer and the dome light comes on when you lift the door handle, even if the doors are locked. ------------- Shawn
Posted By: skerr
Date Posted: November 22, 2002 at 8:58 AM
I am moving this up anybody have any ideas. I was hopeing I wouldn't have to get the rest of the doors at the passenger door, is there some othe wire that catches all doors besides the dome light. ------------- Shawn
Posted By: Velocity Motors
Date Posted: November 22, 2002 at 9:29 AM
There is no other wire other than the WHITE wire that catches all the door triggers. The WHITE wire catches all doors, but reads the delay. To keep the alarm from reading the delay, place a diode in-line on the white door trigger wire with the anode towards the keyless module. Attach your door trigger wire to the cathode side of the diode. On non-keyless models there is a module with 5 wires located where the keyless normally resides. The white wire there catches only the front two doors. To catch the rear doors use the white wire at the drivers side rear pin switch.
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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: skerr
Date Posted: November 22, 2002 at 11:12 AM
according to the diagram above(the bottom diode) if I hook the cathode side to the alarm it will never recieve the negative pulse to trigger the alarm, right? ------------- Shawn
Posted By: skerr
Date Posted: November 22, 2002 at 11:23 AM
Could I use the pulse off of the lock wire like jrilla suggested? Then the dome light would be off at the same time the alarm is armed. Will this work?
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Shawn
Posted By: jrilla
Date Posted: November 22, 2002 at 11:44 AM
I know you are not asking me, but as long as you can find the wire that shuts off your lights when you lock your doors with the factory remote, and you use a relay from your door locks to create a negative pulse to pulse that wire, and diode isolate it, then it will definatley work. I have the same setup in my own car and I had some of the same thoughts you had when I installed it, but it will work. It has been a while since I did this on mine, so I dont remember which wire it is that shuts off the light, but if you probe it with a ground it will shut them off.
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J Rilla
Owner/Installer
Posted By: skerr
Date Posted: November 22, 2002 at 11:49 AM
What if I just tapped off the (-) lock output of my alarm and diode isolate then I will not have to use a relay, Right?
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Shawn
Posted By: jrilla
Date Posted: November 22, 2002 at 11:49 AM
That should work
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J Rilla
Owner/Installer
Posted By: skerr
Date Posted: November 22, 2002 at 11:52 AM
So then I could use the light under the dash for the trigger on all doors, and I won't have to pick up the rear doors at the rear switch, right?
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Shawn
Posted By: jrilla
Date Posted: November 22, 2002 at 11:52 AM
Right ------------- J Rilla
Owner/Installer
Posted By: skerr
Date Posted: November 22, 2002 at 11:55 AM
Thanks I am going to try jrilla's idea this weekend! I'll let you know how it turns out. ------------- Shawn
Posted By: jrilla
Date Posted: November 22, 2002 at 11:57 AM
Good luck ------------- J Rilla
Owner/Installer
Posted By: jrilla
Date Posted: November 25, 2002 at 11:07 AM
Skerr. How did it turn out? ------------- J Rilla
Owner/Installer
Posted By: skerr
Date Posted: November 25, 2002 at 12:40 PM
I didn't get a chance to finish this install this weekend.
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Shawn
Posted By: NizZEight
Date Posted: December 01, 2002 at 3:32 AM
Shawn, I'm having the exact SAME issue as you are w/ my 97 blaze alarm install, i have everything working cept the door triggers/dome supervision.. if you find something that works i'm definity interested if you'd post up the details for what you did to get this working...glad to see i'm not alone in this! N8 ------------- NizZEight
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