Just finished a motor swap ( well finished getting everything in )
Litle background. All grounds are on the block that i took off. all connectors conected checked and rechecked. I sent the PCM to cam for a safe tune until i could drive up and get a real tune. Car is a 99 6 spd
.
When i turn the key to run i get no gauge sweep and more disturbing no fuel pump kick on. As soon as i connected the battery my passenger side fan came on. On DIC in manual diagnostic mode there is no comunication to ANY system, no comms to bcm, pcm, hvac and on down the list. Is there any thing i should try. Jeff is pretty sure that its not the PCM because the BCM controls the fuel pump and its not seeing that either.... im soo lost any one with any input would be great

 

you have a ground off.the ones in particular is the one on the right front frame rail that's below the battery tray[ground for cluster]and the ground that goes above the starter[pcm ground].but whatever,recheck all the grounds.i'm willing to bet one is just dangling somewhere or is loose

 

Here are the grounds i am thinking of.
1) the one above the starter that is a black thick gauge wire. On block i tapped the hole for it.
2) the one below the battery tray i didnt touch but i saw it. goes from the wiring harness straight to frame
3) the one that comes out of the harness to the back of heads. on and tight
4) this could entail the problem. On the drivers side back of the block there is another ground that come out of the harness ( near the oil temp sensor i think) and there is also a strap that goes from the frame to the block. On the LS1 block they were 2 seperate holes. On this block i just drilled and tapped 1 hole and both are in that hole tight. Should i take the one ground strap from the frame rail to another location? ( i cant see why this would matter??)))

Those are the only ground straps i touched. or am i missing something?

 

you should have 2 on the right side above the starter.1 the wire you see and the battery ground cable.
on the right frame you should have another battery ground and the 1 out of the harness.
on the left,what you did should be ok.
the one behind the left head.
if that's all good,make sure you didn't burn a fusible link.


not trying to sound like a @$#% but you do have a fully charged battery,correct?

 

ok that could be a problem... im pretty sure there was only 1 wire on the pasenger side which was the black wire that came from the battery. ill go look for another one. but i am pretty sure i would have seen that while i was putting everything back together.. and the battery is charged yes.

 

if you follow the negative battery cable,the pigtail goes to the frame and the fat cable goes to the block.

 

That is what i have now.the fat black cable is to the block. the other wire coming out of the wiring harness is attached to the frame below the battery which i never removed.
i have to work at midnight and i cant sleeep.........

 

you should have 2 going above the starter,the battery ground and the main ground for the pcm,hvac,etc.

 

I would try switching out the battery, sometimes the engine swaps take time, battery drains, and is never good again. I don't know if you are in a cold climate, but more subseptibale there!! Check your connections at the battery also, obviously to all this sounds like a bad ground, too many things going wrong not to be. I'd start with checking all your ground points,(which sounds like you did) check terminals, and then the battery. Good Luck!!

 

will be swaping out the battery in the morning and checking all conections... anyone else have anything..

Anyone know where the ground for the BCM is located ?

 

it is the one on the r/s frame that has the pigtail off the neg.battery cable on it.the pcm is 1 of the grounds above the starter.

if you have a voltmeter.what is the battery voltage? if you have 10 volts or less,start there.if it is ok[12.50 or better] and you can swear all grounds are ok.we can move to the voltage side.from the battery you should have 2 power leads,the fatter one going to the starter,2 fusible lnks on the starter go to the alternator.they should both have 12 volts.thepigtail should go to the underhood fuse block at that junction there should be the pigail i just mentioned and theone that goes into the fuse block in the right front floor.if you have a test light,hook the clip to the negative side of the battery and check the following fuses in the underhood fuse block-52/53/4/3/23[this is pcm fuse]/and 51[if you have rtd].they should all have power all the time.then check the fuse block in the r/h floor,you should have power all the time on these fuses:
33/34/30/31/4/3[if you have lumbar]/25/23[these are bcm fuses].

 

Someone sent me this when i was having problems with headlight flicker:




Hope it helps!

 

dpd.. thanks i am pulling the battery tonight and gonna leave it on trickle charge while i am at work tonight. in the morning when i get home i will test those fuses you stated. But once again i am a litle confused about there being 2 grounds above the starter. Maybe different for different years? I have the one eyelet type ground strap above the starter. and then one eyelet that is to the frame just outboard of that but on the frame. Ill see if i cant get some pictures.

stealthy thanks for the diagram.

if there is anyone else with any diagrams with locations of grounds feel free to post or email to me.... thanks alot for all helping and reading up on this.

 

[QUOTE=usnskeet21]dpd.. thanks i am pulling the battery tonight and gonna leave it on trickle charge while i am at work tonight. in the morning when i get home i will test those fuses you stated. But once again i am a litle confused about there being 2 grounds above the starter. Maybe different for different years? I have the one eyelet type ground strap above the starter. and then one eyelet that is to the frame just outboard of that but on the frame.


the ground i'm talking about is G106.this is the fatter negative battery cable.this is bolted above the starter.along with this cable there should be a thinner wire.it's color should be black wire with a white tracer[stripe].if you follow this wire it will lead you to a splice where the pcm is.this splice is about 6 inches from the main harness that's near the pcm connectors.they call this CKT 451.in this splice are 7 grounds,4 being for the pcm,1 for the ignition relay,1 for the maf,1 for the tac controller.the other ground im talking about is called G104.G104 s the pigtail coming off the negative ground cable.this pigtail supplies the ground for a splice pack[those little black square boxes in the car that have those black wires going to].splice pack 208.splice pack 208 is inside the car in the right front kickpanel.this ground wire[G104] is the ground wire out on the right frame rail that has the battery pigtail bolted along with it.this ground supplys the ground for the bcm/sdm/cluster/diagnostic connector/receiver/pnp[if auto].
if the battery ground is actually good,you should have a good ground on G104.SO MAKE SURE THAT THE GROUND ON THE BLOCK IS GOOD.
if you don't have that black/white wire out there[451].start looking for it.
the class 2 links are next to the bcm.there are 3 [i think gray]connectors.

BUT PLEASE MAKE SURE YOU HAVE A GOOD BATTERY,before you end up pulling your hair out.

 

ok well just pulled the battery and had 9.72 volts. i was using it to turn the motor over with the starter while priming the oil system. its on charge now. I know that i dont have that ckt 451 and i dont ever remember seeing it. The pig tail coming from the battery is good.
So the plan of attack in the morning look for ckt 451. Then try with the battery all freshened up.

 

So i owe you guys huge... i had the one ground that should have went with the pigtail going ot the hot lead on the starter stupid wires !!! so i just fixed that and in the morning when the sun comes up i will check and see which fuse i blew then i will go from there. But i just hooked the battery up and guess what??? the computer sees everything now and the fan doesnt cut on..... funny when it doesnt have a hot lead how that works


Thanks to all !!!

 

cool.i just hope you didn't burn out any of the controllers drivers.hopefully you will be ok.sorry,if it sounded like i was arguing with you but it was the only way i could help you.