555F installation with Viper 555ESP

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=37565
Printed Date: September 11, 2025 at 5:57 PM

Topic: 555F installation with Viper 555ESP

Posted By: Blk02Xtreme
Subject: 555F installation with Viper 555ESP
Date Posted: August 17, 2004 at 5:18 AM

Hello, I'm currently installing a 550ESP Remote Start Alarm into a 1997 Expedition. This is the first install I've had to use the 555F with and I'm a little confused on one part of the hookup. Basically I'm unsure if the 'Blue (-) Activation Input' requires a pulsed or constant signal from the brain. I have decided to use one of the following:

Harness2/Pin2 - (-) Factory Disarm Output - Pulse Type (Sends negative pulse when remote start is activated)

Harness3/Pin1 - (-) 200mA Status/Factory Re-Arm Output - Constant Type (Sends negative constant as soon as remote start process begins)

I don't see why the 555F unit would need anything more than pulse on activation, as the key is only checked on start-up to my knowledge. I don't have anything hooked up to either at present, so both are availble.

Also, is it absolutly neccesary to use a relay on this circuit? I can't imagine the 555F draws that much current.

Any assistance in this matter is greatly appreciated.

Regards,

Matt

Replies:

Posted By: Blk02Xtreme
Date Posted: August 17, 2004 at 5:20 AM

Typo in the title. As stated in the actual post, the model of the alarm is a Viper 550ESP; not a non-existant 555ESP.

Thanks again,

Matt

Posted By: tbirdman74
Date Posted: August 17, 2004 at 8:51 AM

I believe that it needs to be activated the entire time that the remote start is engaged. most of the GM's only check for the transponder at first, but I think Ford looks for it all the time. I tapped the one I did into an Ign 2 (-) output with a relay so that when the alarm powered the Ign 2 circuit, it also powered the 555F. Good luck.

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Posted By: auex
Date Posted: August 17, 2004 at 9:36 AM

Use the wire labeled "status output". It should be blue or blue/black.

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Posted By: Blk02Xtreme
Date Posted: August 17, 2004 at 11:16 PM

Excellent, have a slight delay with this because the owner only has 1 key; so waiting for the locksmith to program up another one. But got the module all set. Most likely he will be purchasing the Ford interface kit, as I advised him it's much more reliable than this 555F pellet junk.

Thanks again for the responses!