2000 f150 scytech 777a

Hi need some help

I am installing a astra scytech 777a universal alarm on my sister F150.

I can not find where to tap for the unlock/lock, where to connect my door trigger (+) and where to connect my channel 1 and 2 trunked wiring.

The door does not have a Keyless entry and previous owner did a half job installing an alarm set from a motorcycle.

he did install a set of relay and it is wired to the passanger side wire harness for the unlock/lock (Pink wire) wire.

Should I go ahead and use the relay?

https://www.bulldogsecurity.com/bdnew/vehiclewiringdiagrams.aspx



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thank you for the quick reply with the link smokeman1, very helpful.

I don't know where the BMC is located, is this in the door itself?

I might have go out and find a set of 1amp diode then.

Oh BMC (Body Module Control) sorry long day...

I still don't know where that could be located.

I have seen images where it is somewhere in the dash and other I have seen it in the back of the back seat on the back wall.

She is driving a 2000 ford f150. I don't know to much about it

BCM (Body Control Module)

Power Lock      pink / YELLOW (with keyless entry)      -      Keyless Module above driver kick, gray 22 pin plug, pin 22     
Power Unlock      pnk/lt. grn (all); pur/lt. blu (drv dr)(w/keyless)      -      Keyless Mod above driv kick, gy 22 pin plg, pin11; gy 26 pin plg, pin1
Door Trigger      BLACK / YELLOW      -      GEM on back of dash fuse box, gray 26 pin plug, pin 8
Lock Motor      pink/black      5 wire      driver kick, door harness     
Unlock Motor      RED / orange      5 wire      driver kick, door harness

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thank you admin, and thank you on what number pin and color wiring i need to look for.

I found a video on youtube that showed me how to get to the GEM or BMC that is behind the fusebox.

Ill start finishing up tomorrow.

For anyone that in the future needs to know and you drive a 2000-2003 edition ford F150

You will need a 10mm socket and a deep channel (pocket, throat) 10mm socket.

You don't have to release the top two 10mm nuts just the bottom one's and push the fuse box up and locate the release latch on the cable.

From what the video shows it's a bit difficult to remove just have patient and take your time and it should come off.

You're welcome.

FYI, it's BCM, not BMC.

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thanks again admin

But i can not get any of the door lock working,

as following the link i used two 1amp diode one for each line since the only lock feature is for the driver and passanger door.
------------------------------------------------------------------
I found the following from the list

Door Trigger      BLACK / YELLOW      -      GEM on back of dash fuse box, gray 26 pin plug, pin 8
     
Unlock Motor      RED / orange      5 wire      driver kick, door harness
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But not

Lock Motor      pink/black      5 wire      driver kick, door harness
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I went back to my manual and i miss read

I need to find
+ trigger - blue
- trigger - green
- passenger unlock - blue/white

Is the BLACK / YELLOW wire for the trigger a - or +?

and where can i find the other trigger?

That truck might Type C locks.
Go to the download/manuals section listed at the top of the page. Find a PDF file DF 1041. In it is an explanation of how to find and test for Type C Locks and how to wire it up. You will need a couple of relays for this.
It is listed in the Scytec 777a manual as Reverse Polarity.

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ok so i found out that the BLACK / YELLOW wire for the trigger is a +

I also figured I only need 1 of the trigger wire

and i still have to tie into the passenger unlock wire (-)

Do i need my diode still?

Do I need to setup a set of diode to get the door unlock/lock through the system?

You will only use one of the alarm's door trigger inputs, either positive or negative, not both. In your case you'll use the negative door trigger input of the alarm.

As far as the door lock motor lead, you'll need to use your meter to test/find it. Even if you find the same color wires listed, you should always verify them with your meter before making any connections. You have 5 wire type door locks, so you'll need to use relays if your alarm does not have build in relays with leads for 30, 87, and 87a.
https://www.the12volt.com/doorlocks/page3.asp#5w

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smokeman1 wrote:

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That truck might Type C locks.
Go to the download/manuals section listed at the top of the page. Find a PDF file DF 1041. In it is an explanation of how to find and test for Type C Locks and how to wire it up. You will need a couple of relays for this.
It is listed in the Scytec 777a manual as Reverse Polarity.

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ok, i got the set of relay the previous owner left from his alarm system build

What does "reverse polarity" mean?

A door lock actuator has two wires. During lock, the first wire will be negative and the second wire will be positive. During unlock, the first wire will be positive and the second wire will be negative. Reversing polarity changes the direction of travel of the actuator.

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If you have the install guide/manual for your scytec, an example of lock systems is listed on page 20.

Page 6 of the DF1041 list how to find and test for Type C locks.

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