Battery replaced and now car will not crank or start

Tiny
RONNIERICE
  • MEMBER
  • 2008 CHEVROLET HHR
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 109,000 MILES
After installing a new battery my car will not do anything when you crank it over. All of my lights are functioning just fine and dash lights work as well. Now the check engine light is on and it will not do anything. Car was running just fine but my battery started getting weak so I replaced it.
Thursday, February 15th, 2018 AT 8:08 AM

7 Replies

Tiny
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  • MECHANIC
  • 1,853 POSTS
Since the ignition switch sends a signal to the ecm through computer data lines, you may need to have trouble codes retrieved in order to find out what is going on but there are a few things you can do before that, first is check the "crank" fuse #5 in the underhood fuse block and if ok, try swapping in a horn relay or similar non important relay for the "crank" relay #34, also in that underhood fuse block.
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Thursday, February 15th, 2018 AT 8:16 AM
Tiny
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I ran trouble codes and nothing shows.
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Thursday, February 15th, 2018 AT 8:18 AM
Tiny
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If the check engine light is on, there must be a code stored.
Are you using a scan tool or just a code reader?
Even just a code reader though should read check engine codes, although if it is not connecting, that does not mean there are no codes.
Are you able to read the ECM/PCM module and if using a scan tool can you access other modules?
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Thursday, February 15th, 2018 AT 8:35 AM
Tiny
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I can jump start the car and check engine light goes off, but it will not start back once I turn it off. I replaced my new battery with another.
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Thursday, February 15th, 2018 AT 1:24 PM
Tiny
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Without the battery charger hooked up, using just the key cranking the starter or at least trying to crank the starter does either battery cable smoke or get too hot to the touch?
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Thursday, February 15th, 2018 AT 1:52 PM
Tiny
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No.
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Thursday, February 15th, 2018 AT 5:12 PM
Tiny
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  • MECHANIC
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Did you check the "crank" fuse #5 in the under hood fuse block and if okay, try swapping in a horn relay or similar non important relay for the "crank" relay #34, also in that under hood fuse block?
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Thursday, February 15th, 2018 AT 5:32 PM

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