2001 GMC Sierra-tach location,wire color
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=23108
Printed Date: May 09, 2024 at 4:16 PM
Topic: 2001 GMC Sierra-tach location,wire color
Posted By: carstarter
Subject: 2001 GMC Sierra-tach location,wire color
Date Posted: December 20, 2003 at 9:52 AM
Need to find the tach wire for a GMC sierra-2001, i understand it`s in the 80 pin red connector under the hood. Has a 8 cyl. engine. Would like to know if i could find the wire inside somewhere, and where?Thanx.
Replies:
Posted By: Geeque
Date Posted: December 20, 2003 at 9:55 AM
White at coil.
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Gary Kline
MECP Master Technician
Posted By: Geeque
Date Posted: December 20, 2003 at 9:57 AM
Truck has seperate coil because it is a V8, 1 cycle setting.
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Gary Kline
MECP Master Technician
Posted By: whitey
Date Posted: December 20, 2003 at 10:11 AM
purple at the front coil pack on the drivers side
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Visions Edmonton
Installation Manager, DLS
MECP Certified First Class
Posted By: carstarter
Date Posted: December 20, 2003 at 11:04 AM
I`M USING A Omega RS-7K2 Remote starter. Any ideas on how to use this unit with this truck, as far as the tach wire? OTE=GEEQUE]Truck has seperate coil because it is a V8, 1 cycle setting.[/QUOTE]
Posted By: carstarter
Date Posted: December 20, 2003 at 11:06 AM
[This 2001 has 4 coil packs, I`m using an Omega RS-7K2 Remote starter.QUOTE=whitey]purple at the front coil pack on the drivers side[/QUOTE]
Posted By: carstarter
Date Posted: December 20, 2003 at 11:08 AM
[QUTruck is a 8 cyl. it has 4 coil packs. any other info u have?OTE=GEEQUE]White at coil.[/QUOTE]
Posted By: Geeque
Date Posted: December 20, 2003 at 11:14 AM
Is there a white wire at any of the coil packs?
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Gary Kline
MECP Master Technician
Posted By: carstarter
Date Posted: December 20, 2003 at 11:18 AM
[QUDon`t have the truck here at this time, if there is one, can i use it?OTE=GEEQUE]Is there a white wire at any of the coil packs?[/QUOTE]
Posted By: Geeque
Date Posted: December 20, 2003 at 11:24 AM
Test it with a DMM in AC to determine that is right wire.
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Gary Kline
MECP Master Technician
Posted By: 1kewlexpo
Date Posted: December 20, 2003 at 2:32 PM
It's the white wire found by the ECM. on the 4.8L, 5.3L, 6.0 L, the tach wire is pin 10 in the red connector. John
Posted By: carstarter
Date Posted: December 20, 2003 at 2:43 PM
Thanx for all ur help, just 1 more question. I`ve forgotten what i should b looking for on my DMM, when testing for the correct tach wire.IS the voltage supposed to swing between 6 & 9 volts? Thanx againTE=GEEQUE]Test it with a DMM in AC to determine that is right wire.[/QUOTE]
Posted By: sroth140
Date Posted: December 22, 2003 at 12:45 AM
heres a good one, pull off the dash like you were going to install a radio, then pull the shifter in to the lowest gear. after that, tilt the steering wheel all the way down. take out the 4 philips head screws that hold the instrument cluster in, tilt it forward and pull it out. find the only white wire (99% sure the only one) in that harness and test it with a voltmeter on AC. that will work perfect. beats going into the engine and messing around there. ive done about 10 of those style suburbans, sierras, ect... trucks since the month started. they are pretty simple to do, all of the wires are right under the dash after two 7mm screws and four 10mm nuts. the locks and lights can be snagged at the BCM right under the steering wheel and the brake wire is right there too on the brake switch.
Posted By: carstarter
Date Posted: December 28, 2003 at 8:20 PM
sroth140 wrote:
heres a good one, pull off the dash like you were going to install a radio, then pull the shifter in to the lowest gear. after that, tilt the steering wheel all the way down. take out the 4 philips head screws that hold the instrument cluster in, tilt it forward and pull it out. find the only white wire (99% sure the only one) in that harness and test it with a voltmeter on AC. that will work perfect. beats going into the engine and messing around there. ive done about 10 of those style suburbans, sierras, ect... trucks since the month started. they are pretty simple to do, all of the wires are right under the dash after two 7mm screws and four 10mm nuts. the locks and lights can be snagged at the BCM right under the steering wheel and the brake wire is right there too on the brake switch.
Posted By: carstarter
Date Posted: December 28, 2003 at 8:22 PM
sroth140
Posted By: carstarter
Date Posted: December 28, 2003 at 8:31 PM
sroth140 wrote:
heres a good one, pull off the dash like you were going to install a radio, then pull the shifter in to the lowest gear. after that, tilt the steering wheel all the way down. take out the 4 philips head screws that hold the instrument cluster in, tilt it forward and pull it out. find the only white wire (99% sure the only one) in that harness and test it with a voltmeter on AC. that will work perfect. beats going into the engine and messing around there. ive done about 10 of those style suburbans, sierras, ect... trucks since the month started. they are pretty simple to do, all of the wires are right under the dash after two 7mm screws and four 10mm nuts. the locks and lights can be snagged at the BCM right under the steering wheel and the brake wire is right there too on the brake switch.
Hey, thanx for all ur help...everything worked out fine, i caught the tach wire just where u said it b.One more thing thats causing a slight problem. If the owner let`s the remote starter run till it`s time of 15 min. runs out, the truck shuts down, but than right after it shuts down, the horn honks one time.I`ve used a bypass module to get around the passlock ll anti theft system , and i`ve run a neg. shut off to the light green factory disarm wire. Everything works fine but for that horn honk at the end of the 15 min. run time of the remote starter. Any ideas on why i get that one horn honk? Thanx again.
Posted By: sroth140
Date Posted: December 29, 2003 at 12:39 AM
umm, did you use a factory disarm wire? it might be something with the factory alarm arming again (like a lock pulse) from when the activation shuts down. the (-) trigger from the brain would go away.
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