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Old 04-12-2004, 11:09 AM   #1
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If you need a wiring diagram...

Check out this site
http://www.bulldogsecurity.com/bdnew/diagramspage.htm

I wish I had this a couple days ago before I installed my alarm. It would have went a lot smoother. Instead I had a halfass diagram I got from another forum that left me tracking down most of the wires myself. If anyones looking for a good do-it-yourself remote start alarm I reccomend UltraStart. www.ultrastarters.com This was my first time ever installing a remote start and it was just as simple as hooking up any other basic alarm I have done. The alarm I have is the 4500 xr-2way. I love the way everything is programmable through the remote and with the lcd screen, there isn't any second guessing if your truck is locked or unlocked, engine running, hood or truck open or closed, etc.

Here is the diagram for my truck in case anyone else might need it. Maybe a sticky should be made with all the different wiring diagrams for s-trucks

BLAZER 1999-2003

WIRE COLORS LOCATION

12 VOLTS RED (+) IGNITION SWITCH HARNESS
IGNITION 1 PINK (+) IGNITION SWITCH HARNESS
IGNITION 2 WHITE (+) small IGNITION SWITCH HARNESS
ACC/HEATER ORANGE (+) IGNITION SWITCH HARNESS
STARTER YELLOW (+) IGNITION SWITCH HARNESS
PARKING LIGHTS BROWN (+) LT. BLUE PLUG @ BCM *1
DOME LIGHT SEE NOTES PURPLE PLUG @ BCM *2
PWR DOOR LOCK LT. BLUE (+) BROWN PLUG @ BCM *1
PWR DOOR UNLOCK WHITE (+) BROWN PLUG @ BCM (TYPE A)
TRUNK RELEASE BLACK ( - ) PURPLE PLUG @ BCM
TACH SENSOR WHITE (AC) @ PCM *3
BRAKE WHITE (+) @ STEERING COLUMN
HORN BLACK (-) @ STEERING COLUMN
FACTORY DISARM LT. GREEN (-) PURPLE PLUG @ BCM

NOTES:

*1 - The BCM is located to the right of the accelerator pedal below the radio. The plugs on the BCM face towards the drivers side.

*2 - Use tan for the drivers door located in pin B4 of the purple plug, orange for the passenger door located in pin B2 of the purple plug, and dk. blue/white for the rear doors and rear hatch located in pin B11 of the lt. blue plug, must diode isolate these wires.

*3 - The PCM is located on the passenger fender. On the 2.2L the wire is in a black 80 pin plug pin 10, and on the 4.3L the wire is in a red 32 pin plug pin 20.
Old 04-12-2004, 12:39 PM   #2
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Re: If you need a wiring diagram...

That site is usually correct for wire info, just make sure u check with a multimeter or a computer safe test light so you know for sure that wire does what it says it does. If you need any wire info let me know, I have a copy of the DEI techsoft program at my shop, and wire magic which constantly get updated.
Old 04-12-2004, 04:41 PM   #3
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Re: If you need a wiring diagram...

Also to anybody scared of messing with the factory PassLock system, don't be. All you do is measure the stock resistance of the ignition with an ohm meter, then dial-in the PassLock bypass module for the same resistance, and last hook up the miscellaneous wires (power, ground, etc.) Anybody with simple 12V electrical skills can do it.
Old 04-12-2004, 05:04 PM   #4
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Re: If you need a wiring diagram...

[QUOTE=Derrick824] All you do is measure the stock resistance of the ignition with an ohm meter, then dial-in the PassLock bypass module for the same resistanceQUOTE]


If you use a DEI 555L passlock bypass, its self learning. You dont even need to measure the resistance with a multimeter, just wire it up, start the truck, and it automatically learns. Crimestopper and a few other companies make auto learning passlock bypasses, and the new thing out is the databus wire modules. With these, you just wire the module up to the alarm/remote starter unit, and to the databus wire in the car, and it automatically learns the passlock resistance, does the doorlocks, and some do door triggers....without having to individually search for each of those wires But yeah, if you have 12 volt knowledge, s10's are not hard vehicles to do alarm/remote starter work on.
Old 04-12-2004, 05:19 PM   #5
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Re: If you need a wiring diagram...

[QUOTE=laynlow03xtreme]
Quote: Originally Posted by Derrick824
All you do is measure the stock resistance of the ignition with an ohm meter, then dial-in the PassLock bypass module for the same resistanceQUOTE]


If you use a DEI 555L passlock bypass, its self learning. You dont even need to measure the resistance with a multimeter, just wire it up, start the truck, and it automatically learns.
That's even easier. The bypass module I had was made by DesignTech. I picked it up at a local place. When I do my Yukon I'll definitely use a DEI 555L.
Old 07-30-2005, 04:20 PM   #6
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Re: If you need a wiring diagram...

is that wiring diagram the same for a 2001 s10 ext. cab?? cause i wanna instll my remote start also... if not can you show me a diagram.. thanks..
Old 07-30-2005, 06:48 PM   #7
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Re: If you need a wiring diagram...

Wow, this thread is over a year old. Anyways, try following the link I posted above and choose your specific vehicle. It even has pictures.
Old 08-27-2006, 03:05 PM   #8
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Re: If you need a wiring diagram...

Found the BCM but it looks like two brown wires in it. Trying to find the parking lights wire at the BCM im staring at the the plugs in the bcm trying to decide what one to try there are 3 plugs two blue plugs and one blue/purple plug that has the door triggers. Is it the Middle plug that has the parking lights? its on a 98s10
Old 08-27-2006, 03:58 PM   #9
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Re: If you need a wiring diagram...

well figured that out. says brown blue purple right on the bcm by the plugs. im a idiot
Old 08-28-2006, 12:39 PM   #10
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Re: If you need a wiring diagram...

instead of the 555L look up online for the bypasskits.com and order theirs. one wire hook up to the diagnostic plug.
Old 08-30-2006, 10:05 PM   #11
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Re: If you need a wiring diagram...

You can get a prety good set of wiring diagrams @ http://www.ahdol.com/. It's WELL WORTH the $13 investment.

I got a 60 page pdf for the 04 Blazer ZR2. I have the 05, but it's identical to the 04 as far as I know.

1 x cover page.
4 x index pages.
55 x circuit diagrams. There are a few that are almost the same showing differences for certain options)

I'd been looking for some of these for over a year. I'd have GLADLY paid $100 for the radio harness diagram alone when I was installing my A/V system...
http://www.zr2usa.com/members.php?id=2018

-dc4bs

BTW: Here's the index of what they sent me just so you can see roughly what to expect for the $13... Depending on the specs you give em, there may be more or less than this. I asked for 2004 S-10 Blazer ZR2 4.3L and got the following:

AIR CONDITIONING
Fig. 1: Compressor Circuit
Fig. 2: Manual A/C Circuit

ANTI-LOCK BRAKES
Fig. 3: Anti-lock Brakes Circuit

ANTI-THEFT
Fig. 4: Forced Entry Circuit
Fig. 5: Pass-Key Circuit

BODY CONTROL MODULES
Fig. 6: Body Control Modules Circuit

COMPUTER DATA LINES
Fig. 7: Computer Data Lines Circuit

CRUISE CONTROL
Fig. 8: Cruise Control Circuit

DEFOGGERS
Fig. 9: Defoggers Circuit, W/ Manual A/C

ENGINE PERFORMANCE (4.3L VIN W)
Fig. 10: 4.3L VIN W, Engine Performance Circuit (1 of 4)
Fig. 11: 4.3L VIN W, Engine Performance Circuit (2 of 4)
Fig. 12: 4.3L VIN W, Engine Performance Circuit (3 of 4)
Fig. 13: 4.3L VIN W, Engine Performance Circuit (4 of 4)

EXTERIOR LIGHTS
Fig. 14: Back-up Lamps Circuit
Fig. 15: Exterior Lamps Circuit

GROUND DISTRIBUTION
Fig. 16: Ground Distribution Circuit (1 of 3)
Fig. 17: Ground Distribution Circuit (2 of 3)
Fig. 18: Ground Distribution Circuit (3 of 3)

HEADLIGHTS
Fig. 19: Headlights Circuit, W/ ZR2 (without DRLs)
Fig. 20: Headlights Circuit, W/O ZR2 (with DRLs - I dunno why ZR2 is in the title - dc4bs)

HORN
Fig. 21: Horn Circuit

INSTRUMENT CLUSTER
Fig. 22: Instrument Cluster Circuit (1 of 2)
Fig. 23: Instrument Cluster Circuit (2 of 2)

INTERIOR LIGHTS
Fig. 24: Courtesy Lamps Circuit (1 of 2)
Fig. 25: Courtesy Lamps Circuit (2 of 2)
Fig. 26: Instrument Illumination Circuit

POWER DISTRIBUTION
Fig. 27: Power Distribution Circuit (1 of 5)
Fig. 28: Power Distribution Circuit (2 of 5)
Fig. 29: Power Distribution Circuit (3 of 5)
Fig. 30: Power Distribution Circuit (4 of 5)
Fig. 31: Power Distribution Circuit (5 of 5)

POWER DOOR LOCKS
Fig. 32: Power Door Locks Circuit

POWER MIRRORS
Fig. 33: Electrochromic Mirror Circuit
Fig. 34: Power Mirrors Circuit

POWER SEATS
Fig. 35: 6-Way Power Seat Circuit
Fig. 36: 8-Way Adjustable Power Seat Circuit
Fig. 37: Heated Seats Circuit
Fig. 38: Lumbar Circuit

POWER TOP/SUNROOF
Fig. 39: Power Top/Sunroof Circuit, Except Xtreme
Fig. 40: Power Top/Sunroof Circuit, Xtreme

POWER WINDOWS
Fig. 41: Power Windows Circuit, 2 Door
Fig. 42: Power Windows Circuit, 4 Door

RADIO
Fig. 43: Radio Circuit

SHIFT INTERLOCK
Fig. 44: Shift Interlock Circuit, W/ Column Shift
Fig. 45: Shift Interlock Circuit, W/ Floor Shift

STARTING/CHARGING
Fig. 46: Charging Circuit
Fig. 47: Starting Circuit

SUPPLEMENTAL RESTRAINTS
Fig. 48: Supplemental Restraints Circuit

TRANSMISSION (4.3L VIN W)
Fig. 49: 4.3L VIN W, A/T Circuit, 4L60-E
Fig. 50: 4.3L VIN W, Transfer Case Circuit, W/ 2-Speed Automatic Transfer Case
Fig. 51: 4.3L VIN W, Transfer Case Circuit, W/ 2-Speed Selectable Transfer Case

TRUNK, TAILGATE, FUEL DOOR
Fig. 52: Liftgate/Endgate Release Circuit

WARNING SYSTEMS
Fig. 53: Warning Systems Circuit

WIPER/WASHER
Fig. 54: Front Wiper/Washer Circuit
Fig. 55: Rear Wiper/Washer Circuit
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