Pontiac Firebird 1967-2002 Birds of a feather flock together

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Old May 14, 2015 | 05:00 PM
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Old May 14, 2015 | 05:03 PM
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Sorry, first time using photobucket mobile. This is what I meant to post.


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Old May 14, 2015 | 06:09 PM
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Manual or auto? You may have severed the park neutral switch or the brake switch
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Old May 14, 2015 | 06:13 PM
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Originally Posted by blackbyrd
Manual or auto? You may have severed the park neutral switch or the brake switch
Manual. What's this switch, what does it look like and where is it?
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Old May 14, 2015 | 07:04 PM
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For a manual it should be tied into brake switch on the pedal assembly but I'm not for certain it goes to the bcm
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Old May 14, 2015 | 07:08 PM
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I'll have a look. I was under there trying to sort out a bunch of wires but I never cut anything under there. Maybe I knocked something loose.
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Old May 15, 2015 | 06:55 AM
  #47  
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Originally Posted by Major Shart
So I connected the yellow and black wire from the starter relay in the junction box to a ground and still nothing. I haven't sorted the dark blue one yet but I thought it would at least turn over. What else am I missing?
Time to get out the test light or multimeter. First pull the starter relay and check that there is battery voltage (12V+) at the red wire pin C4 of the relay socket. Then check that you have ground on pin C6 of the socket - that's the yellow/black wire... it never hurts to double check before getting deeper into diagnostics. Finally, check that you get 12V on pin B4 in the socket (dark green wire) when you turn the key to the START position.

If any of those don't produce the results they should then track down and repair the reason. For example, the dark green wire provides power to the starter relay coil through the clutch safety switch or neutral position switch depending on manual or automatic transmission. Those switches can go bad or get out of adjustment.

If all of those things check out properly then reinstall the starter relay and check that you get 12V+ power at the starter solenoid when you turn the ignition key to START. If not, you either have a bad relay or something is wrong with the wire between the relay and the solenoid. If you get power at the solenoid but it still doesn't crank then your solenoid or the starter itself is the problem.

Once you get it cranking, we can move on to making sure it gets fuel to start and run.
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Old May 15, 2015 | 07:20 AM
  #48  
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I'll get to it this weekend, thanks for staying with the topic. I'll post back. Sucks because all I did was cut that stupid bundle out...
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Old May 15, 2015 | 06:17 PM
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Where did you cut the harness at in the vehicle. Under the dash at the kick area near the floor pan or in the rear of the vehicle. Was the battery disconnected when you cut it.

All of the wiring related to BCM antitheft and antitheft starter relay is contained in the dash area none of it runs in the harness down the passenger side of the vehicle. The only wiring from the BCM that runs in that harness is the shock sensor mounted in the rear. If the battery was not disconnected there is the possibility that if the harness was cut in one fell swoop with cutters it could have back fed power up the shock sensor circuit and blew up the BCM causing the no start.
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Old May 15, 2015 | 06:22 PM
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Originally Posted by 01WS6/tamu
Where did you cut the harness at in the vehicle. Under the dash at the kick area near the floor pan or in the rear of the vehicle. Was the battery disconnected when you cut it.
At the kick panel. Battery was disconnected...pretty sure ugh. I remember thinking "oh **** I forgot to disconnect the battery" but can't remember for certain if that was before or after I cut this bundle.
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Old May 15, 2015 | 06:26 PM
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Do all BCM functions work RAP, keyless entry, trunk pop, horn, turn signals door locks, hazard flashers
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Old May 15, 2015 | 06:28 PM
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Honestly the only thing out of that list I have checked so far was the signals. They worked. Not sure what "rap" is.
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Old May 15, 2015 | 06:28 PM
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Not sure if it matters but the windows work.
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Old May 15, 2015 | 06:43 PM
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Rap is retained accesory power that keeps windows and radios operational after you shut the key off before you open the drivers door. Do you have the car together enough to see if the list of above works. It could always have wounded the BCM causing the no start and still have all of the above stuff work. Is the security LED on dash and the security indicator in the instrument cluster functional.

What does the security indicator in the cluster do when you insert the key and the go from off to on ignition position then to crank and back to on position?
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Old May 15, 2015 | 07:36 PM
  #55  
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Originally Posted by 01WS6/tamu
Rap is retained accesory power that keeps windows and radios operational after you shut the key off before you open the drivers door. Do you have the car together enough to see if the list of above works. It could always have wounded the BCM causing the no start and still have all of the above stuff work. Is the security LED on dash and the security indicator in the instrument cluster functional.

What does the security indicator in the cluster do when you insert the key and the go from off to on ignition position then to crank and back to on position?
The car is together enough to check door locks, windows and signals. Possibly lights, they aren't coming (headlights) on but I can't be certain that isn't from something else. I haven't gotten that far yet and I have never turned them on before.

The red light flashes and the orange "security" comes on in the dash as well as a couple of other lights, can't remember which, but when I try to start it they all turn off.
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Old May 15, 2015 | 08:06 PM
  #56  
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If the key is rotated from off to the on position is the security light solid or flashing
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Old May 15, 2015 | 08:10 PM
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Originally Posted by 01WS6/tamu
If the key is rotated from off to the on position is the security light solid or flashing
It goes from flashing to solid.
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Old May 15, 2015 | 08:13 PM
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When I say lamp let me clarify sorry. The security indicator in the instrument cluster. Key off what is it doing and key on not in crank position what is it doing.
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Old May 15, 2015 | 08:17 PM
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Originally Posted by 01WS6/tamu
When I say lamp let me clarify sorry. The security indicator in the instrument cluster. Key off what is it doing and key on not in crank position what is it doing.
Key in but in off position there is nothing. Turn it to on and the orange security "light" comes on for about three seconds then turns off. Key still in on position, hasn't moved to start.
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Old May 15, 2015 | 08:19 PM
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Parking (driving) lights come on and turn signals work. No headlights.
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