Door Lock problem Ford F-Series

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=465
Printed Date: May 14, 2024 at 6:56 PM

Topic: Door Lock problem Ford F-Series

Posted By: Thinkster
Subject: Door Lock problem Ford F-Series
Date Posted: April 26, 2002 at 4:00 AM

Installed an alarm last year in a 2000 F-Series Truck that has 4 doors/power locks. The door lock wires were (-) pulse for lock & unlock. Customer said a couple months ago, the power door locks stopped working. I recently checked it out and alarm was outputing correctly but the doors would not lock or unlock. You could here the sound like the solenoids were engaging, but no physical locking or unlocking. Even the switch to lock/unlock all doors didn't work. The sound was there in each door but it was as if the solenoids were not getting enough power or current to mechanically lock or unlock. I don't think this is Alarm related, but has anyone else experience something like this or have an idea of what the problem may be?

Replies:

Posted By: Velocity Motors
Date Posted: April 26, 2002 at 11:07 PM

Check to see if you can manually add a ( - ) pulse to the target wire and get the actuators to engage. So you said that the alarm does output a clean ( - ) pulse to the door locks ?

-------------
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA

Posted By: Thinkster
Date Posted: April 27, 2002 at 1:15 AM

I measured the negative pulse for both lock & unlock with a digital meter and it was o.k. As I said, the lock are not even working with the factory lock/unlock switch. It's almost though all the factory actuators/solenoids are "fried" but they still make the noise but don't seem to have the torque to mechanically lock or unlock.

I just don't want the customer to think the problem is because of the alarm or a result of the alarm being hooked up to the door locks when the alarm is fine.

Posted By: scss
Date Posted: April 30, 2002 at 12:50 AM

When you did the install did the solenoids felt like they were about to give? I asked this because the solenoids start making noises when there about to go out. You might check the switches to see if they are fuctional OR

Check your relays if they were reverse polarity
Check your connections, if you tagged pink / YELLOW for lock and pink green for unlock you did it right.
The only other problem i could think of is that its a FORD

Posted By: Thinkster
Date Posted: April 30, 2002 at 3:33 AM

Quote: Originally posted by scss on April 30, 2002

The only other problem i could think of is that its a FORD

I think that is it! Being that it's a Ford, that is a problem within itself !!

I told the customer to have the dealer check out the problem cause all my connections looked fine. And since the D/L switch on the Driver AND passenger side both Audibly control the solenoids, I know both switches can't be bad.