doors unlock by brake while driving
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=125290
Printed Date: May 28, 2024 at 8:56 PM
Topic: doors unlock by brake while driving
Posted By: tresvatos
Subject: doors unlock by brake while driving
Date Posted: December 28, 2010 at 1:34 AM
I am having some trouble with an Ultra start Manual transmission Model Remote Start Keyless feature, or the Lock/Unlock part rather. The model is 1275 M by the way. The Remote Start is working as well as the Unlock/ Lock features using the key fob. The Problem that I have is that when driving after ignition sequence and key in ON -Start Position the doors unlock and relock as well as siren chirp every time the driver's brake is pressed.. The relay in the Ultra mdule clicks as well. The door lock system is Reverse Polarity or Bulldog Type C by the way. does anyone have any idea what may be causing this or how i may remedy this during driving operation.. Thanks, greg
Replies:
Posted By: DYohn
Date Posted: December 28, 2010 at 11:43 AM
Well the obvious answer is you have something wired wrong: what's the vehicle? ------------- Support the12volt.com
Posted By: tresvatos
Date Posted: December 28, 2010 at 12:30 PM
vehicle is a 1990 BroncoII, or essentially a Ford Ranger wire harness.. The Remote Start /Keyless is an Ultra 1275 M.. The lock/unlock feature are configured in a Reverse Polarity syastem with Two relays added.
Posted By: tedmond
Date Posted: December 28, 2010 at 1:22 PM
DYohn] wrote:
ell the obvious answer is you have something wired wrong: what's the vehicle?
something is definitly wrong with the wiring. ------------- Ted
2nd Year Tier 1 Medical School
Still installing as a hobby...pays for groceries
Compustar Expert
Posted By: tresvatos
Date Posted: December 29, 2010 at 1:26 AM
the relays are wired as the reverse diagram indicates so is there any other way to trobleshoot as to what may be going on here
Posted By: tedmond
Date Posted: December 29, 2010 at 2:08 AM
remove the relay and if it doent unlock when pressing the brake petal, you know its a wiring problem.
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Ted
2nd Year Tier 1 Medical School
Still installing as a hobby...pays for groceries
Compustar Expert
Posted By: tresvatos
Date Posted: December 29, 2010 at 8:14 AM
well that makes since excpept i dont think the doors are goin to lock/unlock without the relay which they are wired to. The thing I think is the module is receiving some stray ground current or pos. current from somewhere, as I can hear the relay in the module clicking when I press the brake, as well as the alarm/siren chirp twice, so something is activating the relay inside the module. I wonder if it would be a bad idea to put diodes on the brake pos input wire, so that the module doesnt receive any stray current be it ground from another source like lights or third brake light. I can also do the diodes with the park lights and door open pin ( pos ) just so the module doesny receive any residual current .
Posted By: resquchas
Date Posted: December 29, 2010 at 10:13 AM
diodes to fix a wiring issue is not the answer. if these guys say its a wiring problem.....then they are probably right. start by removing one thing at a time and see if the problem goes away. then you can isolate the issue and diagnose. use a DMM while pressing the brake to figure out what is happening.
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The RIGHT way is the ONLY way.
Posted By: tresvatos
Date Posted: December 29, 2010 at 1:52 PM
ok I put the DMM to my parking brake switch wire and for some reason ( I did not permenant groung my park brake wire, by the way ) It is showing that it is grounded. With the Ultra Start the way to set it in Reservation mode is to apply park brake, which the syatem thinks I,m doing, then apply brakes, the Ultra chirps twice, and unlocks doors just like the problem I'm having. So I think the module thinks I want to put the system in reservation mode as I'm driving down the road. So NOW I have to fand a way that my Park Brake switch will only show a ground current when depressed, and not all the time.. Any suggestions for a ford 1990 Bronco II.. Thanks!
Posted By: resquchas
Date Posted: December 29, 2010 at 2:45 PM
please clarify, parking brake or brake pedal. seperate switches......
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The RIGHT way is the ONLY way.
Posted By: resquchas
Date Posted: December 29, 2010 at 3:07 PM
even if the parking brake is showing constant ground. (which you should fix with that switch) you hitting the brake pedal should not chirp the horn and put the unit into its reservation mode. that is a sequence of events that should be required. are you on the 12 volt side of the brake pedal switch. only 12 volts when the brake pedal is depressed?
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The RIGHT way is the ONLY way.
Posted By: tresvatos
Date Posted: December 29, 2010 at 5:31 PM
well the PARK BRAKE is the one constantly showing a ground.. so when I pressed the driver brake it was trying to go into the reservation mode to remote start for manual trans. So the module actually thought I was parked. I took the switch and cleaned it, and made sure I had good connections and That solved my week of headaches with this Remote Start install! thanks everyone for all the suggestions and input!
Posted By: resquchas
Date Posted: December 29, 2010 at 6:57 PM
good job. sometimes the simplest thing derails all else. had a friend with gremlins for a year in his denali. checked the ground wire at block....it had arced so much that the cable was loose at the block and the bolt was almost in half. congrats
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The RIGHT way is the ONLY way.
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