Here's the diagram so you can see things a little better.
Here's the diagram so you can see things a little better.
97 GMC, 2002 LS6.
1991 GMC Syclone #1428
Well that sucked! GasGuzzler is correct, I only glanced at the diagram earlier and the N/S switch does ground through the relay as you can tell in the diagram that's too small to read.
97 GMC, 2002 LS6.
1991 GMC Syclone #1428
There is a neutral safety switch wire on the new computer/harness, right now its not connected to anything. Are you saying this wire needs to be grounded? If no, On the tranny there are two different harness connections, is there a particular wire that the neutral safety switch wire should be connected too? Be specific and if need be, draw pictures.
Any chance there is a LS guru in KY, willing to help, put their hands on this mess of a project?
Thanks
Last edited by LSXmyford; 08-12-2008 at 07:26 PM.
LSX conversions, so easy a caveman can do it.
Is this a brand new harness or a reworked one? I don't know of anyone that tests harnesses out when they rework them. New harnesses are just that, new, and shouldn't need testing. The guy that did my first harness conversion swore he tested my harness and PCM out on a test engine on a stand, only he was full of crap since VATS was still in the PCM and would not let the engine start. Nelson removed the VATS and put a hotrod tune in the PCM and it started right up.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
The wires that I recall at the pcm are the old ones. Hes using a harness from the guys that fixed yours.
I guess they just add the connections.
About the neutral safety switch wire at the PCM....does it need to be grounded, any ground work? if no, the neutral safety switch itself has two electrical connections, combined there probably ten wires, which wire should the neutral safety switch (at the PCM) be connected too on the neutral safety switch itself?
Last edited by LSXmyford; 08-12-2008 at 07:32 PM.
LSX conversions, so easy a caveman can do it.
this is a reworked harness.
This is what I did to test for resistance through the wire, correct me if I'm wrong. Set the meter up on ohms hooked 1 end to the blue/white wire on crank sensor signal and then the blue/white wire to crank on pcm. I get 0.00. Which is what I get if I take just a scrap wire to test and make sure there is no breaks. I get this for both crank and cam sensor signals to pcm.
I keep asking if vats were taking off and he says yes. It just after going through this theres not much else it could be but the pcm.
1996 GMC extended cab, 2003 5.3/auto
may be a bad pcm or the tune didn't take
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
if you know someone that has the same year model truck as the year PCM tune you're running, you should be able to take your PCM and plug it into their truck and it should run. Do you know someone that would let you swap them to test the PCM?
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
nope. I know someone with a 19999, 2-2002's but not the 2003 of course.
1996 GMC extended cab, 2003 5.3/auto
No, do not ground the yellow N/S wire, it goes straight out of the C100 connector to the switch input. The output is a purple wire which goes to pin B9 on the relay which goes across to pin A7 which goes to the ground distibution. The pin A9 goes to a constant 12 volts and the other contact side pin B7 goes to the purple solenoid wire. Fip the relay upside down to see the pin locations. Hope this is what you were looking for.Originally Posted by LSXmyford
97 GMC, 2002 LS6.
1991 GMC Syclone #1428
Posting Permissions
Reply With Quote