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car wont start?


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04crf450 
Member - Posts: 7
Member spacespace
Joined: October 16, 2007
Location: Oregon, United States
Posted: October 29, 2007 at 2:13 AM / IP Logged  
Hey guys im in the process of taking out my system in my truck. Well i took out the three batteries and all my amps and subs i have in my cab and when i went to start the car it wouldnt turn on. My volt meter was reading like 8. something volts and to turn it on i have to have it jumped. Any suggestions on what it could be. My fuses by the battery under the hood looked fine. The alt is fine as well it idles at like 13.7 volts. thanks.
soundman707 
Member - Posts: 5
Member spacespace
Joined: October 28, 2007
Location: Ohio, United States
Posted: October 29, 2007 at 3:25 AM / IP Logged  
maybe your under-hood battery is bad?
haemphyst 
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Joined: January 19, 2003
Location: Michigan, Bouvet Island
Posted: October 29, 2007 at 6:56 AM / IP Logged  
soundman707 wrote:
maybe your under-hood battery is bad?
...and when it was parallelled with two OTHER battereis, it was masked. Replace your underhood battery, and I can almost guarantee that your issues will end.
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
Velocity Motors 
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Joined: March 08, 2002
Location: Manitoba, Canada
Posted: October 29, 2007 at 8:00 AM / IP Logged  
I agree with haephyst, you have a bad battery. The at rest voltage of the battery is suppose to be between 11.5 - 13.v any lower and the vehicle will have problems starting it at all.
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
04crf450 
Member - Posts: 7
Member spacespace
Joined: October 16, 2007
Location: Oregon, United States
Posted: October 29, 2007 at 5:18 PM / IP Logged  
Hey guys i disconnected the batt under the hood and it read 12.7 volts or so and i checked the alt voltage, the fuses and everything seems fine. I even bought a batt charger slash starter and it charged the battery to 14 volts and it still wouldnt turn over. I checked my anl fuses and the ones in the ones in the box under my hood.
haemphyst 
Platinum - Posts: 5,053
Platinum spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: January 19, 2003
Location: Michigan, Bouvet Island
Posted: October 29, 2007 at 5:43 PM / IP Logged  
You cant accurately tell the charge of a battery, or what it's state of life is by reading the voltage with a meter. A meter adds NO load to the battery to drag it down, whereas your starter will try to put a load of up to several HUNDRED amps on it. If the battery is sulfated, it will read a full voltage when you think it is "charged" but the battery will still be dead, and will be manifested as such by NOT CRANKING THE STARTER. Sound familiar? Also, stop chasing the fuses. If the car runs perfectly, other than needing a jump-start, then fuses are NOT the issue.
I'm telling you, replace the battery, that's going to fix your issue.
To test the theory, take one of the OTHER batteries, the ones you just removed, and install it in place of the underhood battery. Ten to one, it'll work. Then, once you do that, and the engine starts, take the presently-underhood battery to your nearest battery or autoparts shop, and have it load tested. It'll be bad.
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
04crf450 
Member - Posts: 7
Member spacespace
Joined: October 16, 2007
Location: Oregon, United States
Posted: October 31, 2007 at 12:43 AM / IP Logged  
I put in a another one of batteries and still no luck. When i turn the key over it doesnt make a sound or show any intention to start up. What else could it be
DYohn 
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Joined: April 22, 2003
Location: Arizona, United States
Posted: October 31, 2007 at 8:32 AM / IP Logged  
Could be any number of issues with your starter.  Sounds like time for a tow to the shop.
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xtremej 
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Joined: February 24, 2006
Location: United States
Posted: October 31, 2007 at 8:41 AM / IP Logged  
There are alot of variables, Ditto on taking it in to a shop.
Velocity Motors 
Moderator - Posts: 12,488
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Fabrication. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.spacespace
Joined: March 08, 2002
Location: Manitoba, Canada
Posted: October 31, 2007 at 8:42 AM / IP Logged  
Make, model and year of the vehicle please.
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
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