Haveing a no/crank starting iss.

Tiny
SSHDSILVERADO
  • 2000 CHEVROLET VENTURE
  • 149,000 MILES

Ok trying to figure out a no start/no crank at starter relay I have power on red main wire, key is start I get + power on both the nss wire orange and black and the the pcm wire yellow and black, the pcm shoud be a ground signal correct, at ecm I have power coming in on the purpale in to I think it 23 or 76 I might have them back words but postive going out on the yellow black

Do you
have the same problem?
Yes
No
Saturday, June 30th, 2012 AT 2:16 PM

26 Replies

Tiny
SATURNTECH9
  • EXPERT
  • 31,083 POSTS

So do you have power to the purple wire at the starter with the key in the start position?

Was this
answer
helpful?
Yes
No
Saturday, June 30th, 2012 AT 2:40 PM
Tiny
SSHDSILVERADO
  • MEMBER

No on the starter relay with the key in start position the main red yellow and black, and orange and black are hot + 12.04 volts I think the yellow and black tracer wire is to go to - ground when the key goes to start position

Was this
answer
helpful?
Yes
No
+1
Saturday, June 30th, 2012 AT 3:38 PM
Tiny
SATURNTECH9
  • EXPERT
  • 31,083 POSTS

The output wire out of the starter relay is purple that is the trigger wire to the starter. Is there battery voltage at the starter with the key in the start position?That would tell us if the starter relay was working and giving power to the starter.

Was this
answer
helpful?
Yes
No
-1
Sunday, July 1st, 2012 AT 12:04 AM
Tiny
SSHDSILVERADO
  • MEMBER

No purp wire out of relay has no power. Hevy red wire has power. Orange w/black tracer ((((nss)) has power. Yellow w/black tracer has positive power(((( pcmwire)))) when key is in start position. I allso have no messages on driver cent like security or battery

Was this
answer
helpful?
Yes
No
+1
Sunday, July 1st, 2012 AT 5:39 PM
Tiny
SATURNTECH9
  • EXPERT
  • 31,083 POSTS

Alright while the key is in the start position do you have a ground going to the yellow and black wire at the crank relay?

Was this
answer
helpful?
Yes
No
-2
Sunday, July 1st, 2012 AT 9:01 PM
Tiny
SSHDSILVERADO
  • MEMBER

No yellow and black is for some reason positive

Was this
answer
helpful?
Yes
No
Monday, July 2nd, 2012 AT 7:35 PM
Tiny
SATURNTECH9
  • EXPERT
  • 31,083 POSTS

The neutral safety switch supplys power to the crank relay trigger from the orange and black wire. Then the yellow and black wire to the crank relay has to supply the ground to the trigger of the relay for the relay to work. The yellow and black wire is the actual ground trigger from the pcm. The purple wire out of the pcm/crank fuse should have power with the key in the crank position that goes to the pcm.

Was this
answer
helpful?
Yes
No
+2
Monday, July 2nd, 2012 AT 10:27 PM
Tiny
SSHDSILVERADO
  • MEMBER

Yes the purple wire out of the ecm is hot when the key is in the start position

Was this
answer
helpful?
Yes
No
-1
Tuesday, July 3rd, 2012 AT 6:22 PM
Tiny
SATURNTECH9
  • EXPERT
  • 31,083 POSTS

What about the other wires I mentioned in my last reponse?

Was this
answer
helpful?
Yes
No
+1
Tuesday, July 3rd, 2012 AT 6:50 PM
Tiny
SSHDSILVERADO
  • MEMBER

The orange &black is hot and the purple from crank fuse is hot when key is in start position.I checked continuity through this wire all the way to pcm it is good have 12.10 volts at pcm

Was this
answer
helpful?
Yes
No
-2
Wednesday, July 4th, 2012 AT 4:46 PM
Tiny
SATURNTECH9
  • EXPERT
  • 31,083 POSTS

Is the yellow and black wire sending a ground from pcm to the crank relay will cranking?

Was this
answer
helpful?
Yes
No
Wednesday, July 4th, 2012 AT 6:05 PM
Tiny
SSHDSILVERADO
  • MEMBER

No it is still positive

Was this
answer
helpful?
Yes
No
Wednesday, July 4th, 2012 AT 10:13 PM
Tiny
SATURNTECH9
  • EXPERT
  • 31,083 POSTS

See if its shorted to power somewhere?Is it only power while cranking?

Was this
answer
helpful?
Yes
No
-1
Wednesday, July 4th, 2012 AT 10:18 PM
Tiny
SSHDSILVERADO
  • MEMBER

No it is hot when key is run position also

Was this
answer
helpful?
Yes
No
-1
Wednesday, July 4th, 2012 AT 11:12 PM
Tiny
SATURNTECH9
  • EXPERT
  • 31,083 POSTS

Sounds like the problem is the wire thats supposed to feed the starter relay with a ground from the pcm is giving power instead.I posted a circuit description plus a trouble tree. Foloow the trouble tree and let me know what you find.

Was this
answer
helpful?
Yes
No
Thursday, July 5th, 2012 AT 12:19 AM
Tiny
SSHDSILVERADO
  • MEMBER

Problem does a tech 2 scan tool the only one that will show the passlock enabel code

Was this
answer
helpful?
Yes
No
Friday, July 6th, 2012 AT 1:33 PM
Tiny
SATURNTECH9
  • EXPERT
  • 31,083 POSTS

I would say a tech2 scan tool or more advanced scan tools that do body air bags tire monitor etc. So is the security light on when trying to start it?

Was this
answer
helpful?
Yes
No
Friday, July 6th, 2012 AT 4:32 PM
Tiny
SSHDSILVERADO
  • MEMBER

No security light does not come on at all nor does any othere message in the message center

Was this
answer
helpful?
Yes
No
+1
Wednesday, July 11th, 2012 AT 5:23 PM
Tiny
SATURNTECH9
  • EXPERT
  • 31,083 POSTS

So what did you find from the trouble tree I posted.

Was this
answer
helpful?
Yes
No
Wednesday, July 11th, 2012 AT 5:43 PM
Tiny
SSHDSILVERADO
  • MEMBER

Every nthing it says is pointing to a bad pcm. But it troubles me with not having the security light come on at all. Im gonna try to remove ignition switch and @lean contacts its almost like the bcm is not getting signal

Was this
answer
helpful?
Yes
No
+1
Wednesday, July 11th, 2012 AT 9:44 PM

Please login or register to post a reply.

Recommended Guides