Wiring question on my LS1 swap.

J_Money85 · 03-06-2007, 09:35 PM

Im in the middle of swapping in a LS1 into my s10 and we are having a problem with the antitheft system. The motor will fire up and run for just a few seconds then shut off and we keep getting code p1626 and occasionally code u1255. We took the motor, trans, computer and harness out of the car and are trying to splice my truck harness and car harness together. Is it possible to make the 2 different systems work together or can we over ride it or are we fighting a losing battle? Any help will be greatly appreciated. The donor car is a 2000 Trans Am btw.

***philntx*** · 03-06-2007, 09:41 PM

You just need to have a programmer turn off the antitheft system

gmax111 · 03-07-2007, 04:35 AM

its called VATS, vehicle anti theft system... you need it turned off in the program in order for it to work...

s10-den · 03-07-2007, 07:17 AM

oh,and post pics of it

J_Money85 · 03-07-2007, 07:39 AM

Oh, i definetly plan on posting pics soon

We have pics from the tear down of the TA to where we are now.

BadS15v8 · 03-07-2007, 11:01 PM

Bypass it with a resistor if you know which wires they are coming out the ECM. Find the two wires for the ign. switch (VATS) coming out ECM, test the 2 with a OHM meter, and thats the resistor you need to wire in.

gmax111 · 03-08-2007, 05:41 AM

Quote: Originally Posted by BadS15v8

Bypass it with a resistor if you know which wires they are coming out the ECM. Find the two wires for the ign. switch (VATS) coming out ECM, test the 2 with a OHM meter, and thats the resistor you need to wire in.

yeah this is what i did to get my remote start to work on my old alarm... I think there is info on it at Car Alarm, Car Stereo, Mobile Video, and Cruise Control Info for Installers

BadS15v8 · 03-08-2007, 03:01 PM

Quote: Originally Posted by gmax111

yeah this is what i did to get my remote start to work on my old alarm... I think there is info on it at Car Alarm, Car Stereo, Mobile Video, and Cruise Control Info for Installers

A whole lot cheaper than getting a programmer unless you know someone who has one.

J_Money85 · 03-10-2007, 07:06 PM

Thanks for the help guys, i ended up getting ahold of a speed shop here in town and for 300 dollars they are going to disable the anti-theft, take care of my o2 sensors and egr, and tune the truck. hoping it will be back in my driveway by tuesday or wednesday.

losixxx-nt · 03-11-2007, 04:30 PM

15 cent resistor and a small toggle switch wired in line for a cheap theft deterent system.
I did this on my 83 blazer 4x4 to 94 Camaro drivetrain swap about 10 yrs ago and its worked fine.
Read the resistor of the key that the system came out of and match it.
Also youll need the VATS.

03-06-2007, 09:35 PM	#1
J_Money85 Registered User Age: 24 Join Date: Feb 2007 Posts: 3 Location: User is: OffLine	Wiring question on my LS1 swap. Im in the middle of swapping in a LS1 into my s10 and we are having a problem with the antitheft system. The motor will fire up and run for just a few seconds then shut off and we keep getting code p1626 and occasionally code u1255. We took the motor, trans, computer and harness out of the car and are trying to splice my truck harness and car harness together. Is it possible to make the 2 different systems work together or can we over ride it or are we fighting a losing battle? Any help will be greatly appreciated. The donor car is a 2000 Trans Am btw. Last edited by J_Money85 : 03-06-2007 at 09:36 PM.
	[Reply w/Quote]

03-06-2007, 09:41 PM	#2
*philntx* Build them right....Mod Age: 54 Join Date: Jul 2006 Posts: 2,279 Location: Plano TX User is: OffLine	Re: Wiring question on my LS1 swap. You just need to have a programmer turn off the antitheft system
	[Reply w/Quote]

03-07-2007, 04:35 AM	#3
gmax111 The creeper next 2 you... Age: 24 Join Date: Oct 2005 Posts: 156 Location: Las Vegas, NV... User is: OffLine	Re: Wiring question on my LS1 swap. its called VATS, vehicle anti theft system... you need it turned off in the program in order for it to work...
	[Reply w/Quote]

03-07-2007, 07:17 AM	#4
s10-den takes 2 balls in our game Age: 37 Join Date: Nov 2005 Posts: 4,701 Location: florida User is: OffLine	Re: Wiring question on my LS1 swap. oh,and post pics of it
	[Reply w/Quote]

03-07-2007, 07:39 AM	#5
J_Money85 Registered User Age: 24 Join Date: Feb 2007 Posts: 3 Location: User is: OffLine	Re: Wiring question on my LS1 swap. Oh, i definetly plan on posting pics soon We have pics from the tear down of the TA to where we are now.
	[Reply w/Quote]

03-07-2007, 11:01 PM	#6
BadS15v8 Registered User Age: 23 Join Date: Aug 2005 Posts: 1,126 Location: User is: OffLine	Re: Wiring question on my LS1 swap. Bypass it with a resistor if you know which wires they are coming out the ECM. Find the two wires for the ign. switch (VATS) coming out ECM, test the 2 with a OHM meter, and thats the resistor you need to wire in.
	[Reply w/Quote]

03-08-2007, 05:41 AM	#7
gmax111 The creeper next 2 you... Age: 24 Join Date: Oct 2005 Posts: 156 Location: Las Vegas, NV... User is: OffLine	Re: Wiring question on my LS1 swap. Quote: Originally Posted by BadS15v8 Bypass it with a resistor if you know which wires they are coming out the ECM. Find the two wires for the ign. switch (VATS) coming out ECM, test the 2 with a OHM meter, and thats the resistor you need to wire in. yeah this is what i did to get my remote start to work on my old alarm... I think there is info on it at Car Alarm, Car Stereo, Mobile Video, and Cruise Control Info for Installers
	[Reply w/Quote]

03-08-2007, 03:01 PM	#8
BadS15v8 Registered User Age: 23 Join Date: Aug 2005 Posts: 1,126 Location: User is: OffLine	Re: Wiring question on my LS1 swap. Quote: Originally Posted by gmax111 yeah this is what i did to get my remote start to work on my old alarm... I think there is info on it at Car Alarm, Car Stereo, Mobile Video, and Cruise Control Info for Installers A whole lot cheaper than getting a programmer unless you know someone who has one.
	[Reply w/Quote]

03-10-2007, 07:06 PM	#9
J_Money85 Registered User Age: 24 Join Date: Feb 2007 Posts: 3 Location: User is: OffLine	Re: Wiring question on my LS1 swap. Thanks for the help guys, i ended up getting ahold of a speed shop here in town and for 300 dollars they are going to disable the anti-theft, take care of my o2 sensors and egr, and tune the truck. hoping it will be back in my driveway by tuesday or wednesday.
	[Reply w/Quote]

03-11-2007, 04:30 PM	#10
losixxx-nt Registered User Join Date: Oct 2003 Posts: 189 Location: User is: OffLine	Re: Wiring question on my LS1 swap. 15 cent resistor and a small toggle switch wired in line for a cheap theft deterent system. I did this on my 83 blazer 4x4 to 94 Camaro drivetrain swap about 10 yrs ago and its worked fine. Read the resistor of the key that the system came out of and match it. Also youll need the VATS.
	[Reply w/Quote]