05 Monte Carlo’s & Impala’s
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=56676
Printed Date: October 30, 2025 at 10:13 PM
Topic: 05 Monte Carlo’s & Impala’s
Posted By: shesaidshewas18
Subject: 05 Monte Carlo’s & Impala’s
Date Posted: May 30, 2005 at 12:56 PM
Diagram says that the lock and unlock motor wires rest approximately at 7v and upgrading the factory keyless entry system is not recommended. Well, one of my co-workers says that if I add a 1k resistor from the motor outputs from the alarm to ground, it *should* take care of that. Can anyone confirm? Anyone know how to properly or bypass this 7v thing in order to upgrade the factory alarm system?
Replies:
Posted By: OhioMike1101
Date Posted: May 30, 2005 at 2:38 PM
CHEVROLET, MONTE CARLO, 2005, Power Lock
Lock is negative trigger thru a 470 ohm resistor. Unlock is a straight negative trigger. MUST use relays.
The BCM is under the driver side dash, above the parking brake lever.
Posted By: NowYaKnow
Date Posted: May 30, 2005 at 5:49 PM
To add on to the OEM keyless you just want to use relays. You would run pin 85 to the motor wire in the vehicle, pin 86 to ground. Then pin 87 to power or ground depending if the add-on module has a pos or neg trigger. Then pin 30 to the trigger on the module. If you need to use both motor wires (ie arm and disarm) then you would need 2 relays.. Also some modules want to see the trigger rest at a ground if so you would run pin 87a on the relay to ground..
Mike
Posted By: shesaidshewas18
Date Posted: May 31, 2005 at 6:01 AM
Thanks for the info, but now... Well in this situation, the wires rest "approx" at 7v. What do I do then?
Posted By: NowYaKnow
Date Posted: May 31, 2005 at 6:15 AM
Just how I said with the relays.
Mike
Posted By: sparkie
Date Posted: June 01, 2005 at 8:02 PM
Exactly. Wire the relays just like Mike said.
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sparky
Posted By: shesaidshewas18
Date Posted: July 18, 2005 at 12:34 AM
Is there any other way, Ive seen someone else do it withOUT relays. Resistors and diodes on the motor wires is what he did. Anyone know that method?
Posted By: CutDog504
Date Posted: July 18, 2005 at 2:08 AM
Jeezus Gawd! Just use da freekin relays like he told ya!
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