2004 Grand Marquis "cold key" problem

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=49825
Printed Date: July 04, 2025 at 5:17 PM

Topic: 2004 Grand Marquis "cold key" problem

Posted By: csorb
Subject: 2004 Grand Marquis "cold key" problem
Date Posted: February 10, 2005 at 2:58 PM

Installed a remote starter into a 2004 Grand Marquis. Wrapped a second key for trans. bypass.
Customer says that when car is cold (in morning) rs doesn't work. The techs at Audiovox tell me that there is a problem with some Fords where the key does not work when it's cold.

We tried wrapping with different types of wire, 555U ect. Nothing helps.

Does anyone know a solution to this problem?

Replies:

Posted By: Velocity Motors
Date Posted: February 10, 2005 at 3:05 PM

Use the PKF3. I've used these for the new Taurus' and we live in a climate that is cold most of the time and none of my customer's have had any problems with the vehicle not starting when it's -40 outside ( as long as the car is plugged in of course ).

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

Posted By: ziggyb222
Date Posted: February 10, 2005 at 4:59 PM

I agree with Jeff... the PKF3 is awesome... Have used alot here in Maine..no problems what so ever......

Posted By: NowYaKnow
Date Posted: February 10, 2005 at 6:13 PM

You could also try powering up the 2nd starter wire see if that helps.

Posted By: Velocity Motors
Date Posted: February 10, 2005 at 6:34 PM

2nd starter wire ? Is there something that you know that I don't about this vehicle ??

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

Posted By: thepencil
Date Posted: February 10, 2005 at 7:08 PM

Jeff,

NowYaKnow is correct. There are two starter wires on this car. Power up the second starter wire. I got GREEN/ purple on my wire diagram.

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Be careful whose advice you buy, but be patient with those who supply it. posted_image

Posted By: Velocity Motors
Date Posted: February 10, 2005 at 7:27 PM

That's why I love this site !!! YOu learn something new every day your on here posted_image

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

Posted By: csorb
Date Posted: February 11, 2005 at 7:18 AM

Has anybody verified that doing the other starter wire (which I didn't know about either) will correct this problem?

Posted By: thepencil
Date Posted: February 11, 2005 at 8:27 AM

There are two starter wire that needs to be power up for this car. The second starter wire is your cold start wire. If you miss this and fail to connect it. There is your problem right there. If you correct this, you eliminate at least one issue with starting the car in the cold. Just a thought.

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Be careful whose advice you buy, but be patient with those who supply it. posted_image

Posted By: csorb
Date Posted: February 12, 2005 at 8:34 PM

I'm going to try the pkf3. Thanks

Posted By: NowYaKnow
Date Posted: February 13, 2005 at 11:36 AM

Anytime you have a problem with Fords false alarming add a relay to the door trigger.

85: To (-) door trigger in vehicle
86: To 12v constant
30: To ground
87: To door trigger input on module

Just make you tie your domelight supervision wire into pin 85 or directly into the pink wire or obviously it won't work. Although I think on these vehicles it may turn the interior lights on automatically.. The other option is to hook a 10k resistor directly to 12v and tie that into the door trigger wire, but it doesn't always work.

Mike