Quantcast




All times are UTC - 6 hours [ DST ]




Ask A Question Reply   
Author Message
 

contributions: 2
I have a 97 Isuzu rodeo. I haven't started it since April. I went to start it and it was dead.
A year ago I replaced the battery with an Interstate battery. I had the battery replaced at
no charge. I checked the impedance between the battery cables before I went to connect them
to the battery and I found it to be 10 ohms. I suspect that when the rodeo is turned off, power is
still required by some electronic circuits which usually have an impedance in the 10 to 100 K ohms
given a trickle discharge of maybe 1.2 milli amps down to 120 micro amps. Ohms law tells me that 12v/10ohms = 1.2 amps.
Isn't this high? What should the disconnected impedance be between the cables?

thanks.


Share on FacebookShare on DiggShare on DeliciousShare on TechnoratiShare on TumblrShare on Google+
   
Reply with quote  
* Search   
 
User avatar

contributions: 2017
Images: 37
Location: Oregon
the amp draw will vary depending on what circuits are kept alive and what circuits are put to sleep by the computers in the vehicle. You should look at the actual amp draw after everything is off for an hour. 97 Rodeo may not have a lot of things that stay on but it probably has some.

You should measure the amp draw as soon as you take the key out and close the doors. then watch the draw as time passes. After 45 min to an hour it should be below 0.03 amps

if you aren't going to use the vehicle over months at a time you should probably hook up a battery tender or disconnect the battery because they will go dead over time. Even without a draw, batteries will go dead over time.


   
Reply with quote  
 

contributions: 2
Thanks! I was concerned about connecting the
battery to the leads with only 10 ohms resistance
between them and getting a 1 amp spark when I connect the
second lead to the battery. I'll go ahead and connect the battery
and check the amp draw as you recommended. I
appreciate the advice!


   
Reply with quote  
Ask A Question Reply   

   Similar Topics   Author   Replies   Views   Most Recent 
New Articles View the first battery

in All Other Car Questions

babulenka

2

956

Sun Mar 08, 2015 3:02 am

raneger View the latest

New Articles View the first do I need A new Battery?

in Ford Trucks

woods5511

1

1223

Thu Jan 01, 2015 5:33 pm

carriedi View the latest

New Articles View the first 01 Ram 1500 Battery Cable

in Dodge And Chrysler

CraigD

2

1004

Thu Feb 05, 2015 6:24 am

CraigD View the latest

New Articles View the first 2003 GMC Envoy battery not charging light

in GMC Trucks

skcross

1

1536

Sat Aug 16, 2014 11:40 pm

carriedi View the latest

New Articles View the first Attachment(s) New battery leakage or overheat on a 2002 GMC ENVOY

in GMC Trucks

sedar59

5

1264

Sun Dec 07, 2014 8:45 pm

carriedi View the latest

New Articles View the first 1993 chevy 1500 battery light on

in Chevy Silverado

redneck63

1

1373

Mon Apr 06, 2015 5:38 pm

carriedi View the latest

New Articles View the first 2001 Expedition; dying and will - NEW alternator and battery

in Ford Trucks

glminor

1

1739

Mon Jan 04, 2016 3:30 am

carriedi View the latest


All times are UTC - 6 hours [ DST ]



Search for:
Jump to:  
Contact Us