Vehicle will not crank after disconnect and reconnecting the battery

Tiny
TERESA FEARRINGTON
  • MEMBER
  • 2004 CHEVROLET TRAILBLAZER
  • 0.5L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 200 MILES
All my gauges were not working, the windows or radio quit working. Well we unhooked the battery to reset it and now the vehicle will not crank.
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Monday, October 1st, 2018 AT 3:23 PM

30 Replies

Tiny
KEN
  • ADMIN
Hi TERESA,

It sounds like a fuse (IGNB #36 or crank # 17) let go when you were connecting the battery which is common. Here is a guide to help you test the fuse and the fuse location below:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

This guide can help as well

https://www.2carpros.com/articles/starter-not-working-repair

Check out the diagrams (below). Please let us know what happens.

Cheers, Ken
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Wednesday, October 3rd, 2018 AT 12:41 PM
Tiny
TERESA FEARRINGTON
  • MEMBER
Thank you. I fixed it.
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Wednesday, October 3rd, 2018 AT 5:51 PM
Tiny
KEN
  • ADMIN
Wonderful what was it?
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Thursday, October 4th, 2018 AT 11:01 AM
Tiny
TERESA FEARRINGTON
  • MEMBER
Just had to reset everything. Unhooked the battery. After that. We held the brake down turned the key to the on position, put it in PND and then back in DNP. That reset everything. It cranked.
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Thursday, October 4th, 2018 AT 11:52 AM
Tiny
KEN
  • ADMIN
Nice work, we are here to help, please use 2CarPros anytime.

Cheers, Ken
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Friday, October 5th, 2018 AT 11:44 AM
Tiny
BADBOY65
  • MEMBER
  • 2004 CHEVROLET TRAILBLAZER
Electrical problem
2004 Chevy Trailblazer 6 cyl Four Wheel Drive Automatic

Changed fuel pump and tried starting it and it turned over briefly than nothing at all. Turn the key on and the gauges go crazy, turn key the rest of the way and nothing. Also when trying to take it out of park the button would not depress even when the brake was depressed.
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Friday, October 5th, 2018 AT 11:44 AM (Merged)
Tiny
RHALL77
  • MEMBER
Does the battery seem like it is dead. Try charging it back up and trying it. Let me know what you find
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Friday, October 5th, 2018 AT 11:44 AM (Merged)
Tiny
BADBOY65
  • MEMBER
Tried that also and nothing ws thinking it might have did something to the "brain box", acted kind of funny before the fuel pump and then wouldt start so diagnosed to the fuel ump then after evrything went downhill. Someone said something about a ground wire but there so many to trace just one, last resort take it in to the shop
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Friday, October 5th, 2018 AT 11:44 AM (Merged)
Tiny
RHALL77
  • MEMBER
Are your connections tight at the battery
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Friday, October 5th, 2018 AT 11:44 AM (Merged)
Tiny
MATTY0412
  • MEMBER
  • 2004 CHEVROLET TRAILBLAZER
  • 160,000 MILES
My 04 trailblazer will crank up and turn over but it just won't catch. I start smelli g gas DUI g the turn over. After A couple times trying. If will finally catch and run well the. 2 days later same problem. Any ideas?
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Friday, October 5th, 2018 AT 11:44 AM (Merged)
Tiny
RASMATAZ
  • MEMBER
If its me, I will start by checking the fuel pressure if its within specification
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+1
Friday, October 5th, 2018 AT 11:44 AM (Merged)
Tiny
SATURNTECH9
  • EXPERT
I would also check for codes in the computer.
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Friday, October 5th, 2018 AT 11:44 AM (Merged)
Tiny
WSLJR3645
  • MEMBER
  • 2004 CHEVROLET TRAILBLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 97,260 MILES
2004 trailblazer wont turn over. No codes. Drained the gas tank, put fresh gas in it and still wont turn over. Power to everything, it sounds like it wants to turn over but wont.
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Friday, October 5th, 2018 AT 11:44 AM (Merged)
Tiny
RASMATAZ
  • MEMBER
http://www.2carpros.com/articles/car-cranks-but-wont-start

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if okay-check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,cap and rotor,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing
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Friday, October 5th, 2018 AT 11:44 AM (Merged)
Tiny
CHARLCOOK
  • MEMBER
  • 2004 CHEVROLET TRAILBLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 179,000 MILES
I turned over the engine and it died but it still turns over but wont start. Someone unplugged something on the fuel pump but its not the fuses that I can tell.
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Friday, October 5th, 2018 AT 11:44 AM (Merged)
Tiny
RASMATAZ
  • MEMBER
Check the fuel pump relay if its still there and an unplugged fuel pump connector
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-2
Friday, October 5th, 2018 AT 11:44 AM (Merged)
Tiny
PRYCE2012
  • MEMBER
  • 2004 CHEVROLET TRAILBLAZER
  • 120,000 MILES
I purchased this truck from a dealer. Little did I know it needed a motor. Just had motor changed out. Now it will not crank without a boost, changed alternator still having the same problem. Did some resercg and found out it could be two things the bcm or starter. How do I check my bcm ti see if the probkems there. Help what can it be.
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Friday, October 5th, 2018 AT 11:44 AM (Merged)
Tiny
DUGSMOBILE
  • EXPERT
Just a boost means that the cranking/starting system is the trouble. Have the battery tested and check for clean connections and good cables (not corroded). Just boosting will do nothing to the system except crutch a weak system. The newnes of the motor now takes a little more effort to turn over than before, so if the sytem was borderline before it now fails. Who installed the engine? Were all the cable put back on(especially the ground from battery to block). Have seen that one a number of times from trans shops. (Ooops did I just say that) If a shop did the job why would they return the vehicle in that condition? Ifthe cables and battery are good have the started tested. The relay that drives the starter is commanded on by the computer, but that won't change with a jump. Cranking the engine is the highest amperage load in the vehicle. If you cannot supply the amperage the system will not perform right. Good luck and let me know how it goes.
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Friday, October 5th, 2018 AT 11:44 AM (Merged)
Tiny
AMYJMCCALLUM
  • MEMBER
  • 2004 CHEVROLET TRAILBLAZER
  • V8
  • 4WD
  • AUTOMATIC
  • 145,000 MILES
Hello, My truck cranks up fine but will not go when put into gear. It revs like the engine is in neutral, even though its not. Cranks just like normal, but literally will not go. Any ideas what may be causing this?
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Friday, October 5th, 2018 AT 11:44 AM (Merged)
Tiny
HMAC300
  • EXPERT
Check your transmission fluid level for being full. If it is have apro look at it as it soundslike your trans is out.
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Friday, October 5th, 2018 AT 11:45 AM (Merged)

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