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2002-2007 Trailblazer Remote Start Pictorial


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kreg357 
Platinum - Posts: 7,441
Platinum spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.spacespace
Joined: January 30, 2009
Location: New York, United States
Posted: February 04, 2012 at 5:53 PM / IP Logged  

2005 Trailblazer Remote Start w/Keyless Pictorial

Notes:

2002 - 2007 Trailblazer are the same.  This vehicle was a  2005 LT with factory alarm.
Due to the alarm, Passlock2 and door lock system, it is easiest to use a full featured bypass module like the Fortin INT-SL.  This
module will handle the Passlock2, locks, factory alarm, parking lights and supply a Tach signal, door pin status & turn on heated
seats / mirrors and defroster if the engine temp is below 32 F.
This vehicle has "one touch" starting.  As such, there is no need for an Anti-grind circuit.

Below is the R/S and bypass bench prepped in the W2W mode.  Only 14 wires to connect to the vehicle including the extra relay

for the ACC2 wire ( not shown ).

2002-2007 Trailblazer Remote Start Pictorial -- posted image.

Disassembly:

Remove the two Phillips screws at the edge of the under-dash panel.  Remove the two Phillips screws retaining the ODB2
connector.  Pull the panel down slightly ( clip at center ) and then pull the panel towards the rear of the vehicle.  Feed the
OBD2 connector through the hole and release the trailer controller ( if equipped ).

2002-2007 Trailblazer Remote Start Pictorial -- posted image.

Remove the four Phillips screws retaining the lower dash panel and pull panel staright away at top ( 3 clips ).

2002-2007 Trailblazer Remote Start Pictorial -- posted image.

Remove the two 10mm bolts retaining the knee plate and remove plate.

2002-2007 Trailblazer Remote Start Pictorial -- posted image.

There is no need to open the steering column, all of the necessary wires are now accessable.

Here is a picture of the Brake wire.  Alternate location is at the connector at the top of the brake pedal.

2002-2007 Trailblazer Remote Start Pictorial -- posted image.

Here is a picture to the under steering column ignition connector, left side.

2002-2007 Trailblazer Remote Start Pictorial -- posted image.

Here is a picture of the under steering column ignition connector, right side.

2002-2007 Trailblazer Remote Start Pictorial -- posted image.

Here is a picture of the OBD2 connector.

2002-2007 Trailblazer Remote Start Pictorial -- posted image.

Not shown is hood pin wire.  Firewall pass-thru is at the large grommet in center area of drivers-under dash that contains the

main engine harness.

Soldering is fun!
pts760 
Copper - Posts: 403
Copper spacespace
Joined: December 11, 2009
Location: United States
Posted: February 04, 2012 at 8:49 PM / IP Logged  
Is the Brown- ACC 2 even necessary on this vehicle? I never hook this circuit up. Sounds like a wasted relay to me.
I drink current, eat ohms, and bleed voltage
howie ll 
Pot Metal - Posts: 16,466
Pot Metal spacespace
Joined: January 09, 2007
Location: United Kingdom
Posted: February 05, 2012 at 2:23 AM / IP Logged  
What does the brown control? If only radio and windows you're absolutely right.
kreg357 
Platinum - Posts: 7,441
Platinum spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.spacespace
Joined: January 30, 2009
Location: New York, United States
Posted: February 05, 2012 at 3:55 AM / IP Logged  
While I did verify the Brown wire is an Accessory wire, I did not check to see what items were actually supplied with power
by this wire.  Powered it up for two reasons.  First, it's there and I like to duplicate the regular key functions ( a relay only costs
$2.25 ) and second, this note in the  DirectWire info, "Must be powered up.  If not, the vehicle will crank as soon as it sees Ignition".
Sorry, I did not check to see if that really happens.  While the Starter wire was used, I think GM was in the cross-over period of getting
rid of the Starter wire.
Soldering is fun!
howie ll 
Pot Metal - Posts: 16,466
Pot Metal spacespace
Joined: January 09, 2007
Location: United Kingdom
Posted: February 05, 2012 at 4:00 AM / IP Logged  
Kregg, sorry I confused it with a Nissan X-trail. Got to cross the puddle and look at some GM stuff in the flesh!
I should have sussed it out from the single violet data wire, GM system, a Nissan would have had CAN Hi and Lo.
I believe there will be transmission problems and DTCs being thrown if the brown isn't powered up.
metz35 
Copper - Posts: 458
Copper spacespace
Joined: January 13, 2003
Location: Pennsylvania, United States
Posted: February 05, 2012 at 7:10 AM / IP Logged  
Yes brown needs powered . If not it will crank immediately after seeing ignition.
flobee4 
Silver - Posts: 585
Silver spacespace
Joined: January 02, 2004
Location: United States
Posted: February 05, 2012 at 10:22 AM / IP Logged  
Actually, it depends on the year of the car. I definitely know that a 02,03,04 does not need the brown 2nd accessory hooked up unless doing a XK01 bypass module with window roll-up. Even then its not the remote start powering it, it's a dedicated output from the XK01 using a relay. I'm not positive when the truck started needing the 2nd accessory... but I'm pretty sure it was 07.
pts760 
Copper - Posts: 403
Copper spacespace
Joined: December 11, 2009
Location: United States
Posted: February 05, 2012 at 11:40 PM / IP Logged  
kreg357 wrote:
While I did verify the Brown wire is an Accessory wire, I did not check to see what items were actually supplied with power
by this wire.  Powered it up for two reasons.  First, it's there and I like to duplicate the regular key functions ( a relay only costs
$2.25 ) and second, this note in the  DirectWire info, "Must be powered up.  If not, the vehicle will crank as soon as it sees Ignition".
Sorry, I did not check to see if that really happens.  While the Starter wire was used, I think GM was in the cross-over period of getting
rid of the Starter wire.
Ya a relay may cost $2.25, but for us small retailer's doing 50-100 r/s in this vehicle a year thats saving $112.50-$225 a year on one car. This isn't required just like a lot of GM's around this era
I drink current, eat ohms, and bleed voltage
howie ll 
Pot Metal - Posts: 16,466
Pot Metal spacespace
Joined: January 09, 2007
Location: United Kingdom
Posted: February 06, 2012 at 12:48 AM / IP Logged  
Cost ALL parts into a job quote as miscellaneous or sundries then make the customer happy if you knock $5-20 off at payment time.
It doesn't stop at relays, think of all the other consumables, I've noticed that solder for instance has quadrupled in price over the last three years, tape, sleeving, wiring, write down of tools, I wouldn't worry too much about $225 on that basis, it pales into insignificance.
racerjames76 
Silver - Posts: 581
Silver spacespace
Joined: November 22, 2008
Location: Ohio, United States
Posted: February 06, 2012 at 8:59 AM / IP Logged  

I agree with the OP that we should be duplicating ALL of the key functions whenever possible. I typically do Audiovox units in these and the keyless models don't require any additional parts. I have had to repair way too many GM vehicles that didnt have the Brown ACC wire hooked up, to not do it myself.

When in doubt duplicate everything you can!

Another note, the brake and parking light + wire can be found in the large loom running Drivers side to Passenger side, directly behind and under that large square Ignition connector. Usually it has a silver tape band that says FAP FAP FAP on it. They are usually the largest (besides the Accessory wires) White and Brown wires in that harness.

Also, as most of us know there is another dash version in that vehicle where there may be plastic covers on the very top two 7mm bolts, and a half round metal support that requires four 10mm nuts to be removed.

This is one vehicle where no two techs will use the same location for their hookups. Many different ways to get it done.

To master and control electricity is perfection. *evil laugh*
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