doors unlock by brake while driving

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

Well the obvious answer is you have something wired wrong: what's the vehicle?Support the12volt.com

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.   

DYohn wrote: Well 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

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

remove the relay and if it doent unlock when pressing the brake petal, you know its a wiring problem.Ted

2nd Year Tier 1 Medical School

Still installing as a hobby...pays for groceries

Compustar Expert

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 . 

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.The RIGHT way is the ONLY way.

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!

please clarify, parking brake or brake pedal. seperate switches......The RIGHT way is the ONLY way.