the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
icon

1991 Nissan pickup Alarm Current Draw


Post ReplyPost New Topic
< Prev Topic Next Topic >
airride 
Member - Posts: 9
Member spacespace
Joined: June 02, 2003
Location: Canada
Posted: January 21, 2004 at 4:10 AM / IP Logged  
I have a 1991 nissan pickup and i think i may have a draw, using my digital multimeter, what is a acceptable range for draw with my alarm armed?
Teken 
Gold - Posts: 1,492
Gold spacespace
Joined: August 04, 2002
Location: Aruba
Posted: January 21, 2004 at 4:39 PM / IP Logged  
20-50 mA is very common. If you break 100 mA, you need to have the system either reconfigured, or remove the items that are causing the parasitic current draw from the vehicles battery.
Please keep in mind that current draw will increase during the winter months. Expect to see another 10 mA of draw, just from the cold alone.
Regards
EVIL Teken . . .
airride 
Member - Posts: 9
Member spacespace
Joined: June 02, 2003
Location: Canada
Posted: January 21, 2004 at 5:09 PM / IP Logged  
i was gettting about a 40ma draw, so i guess its ok, i dropped the battery off to be tested, we'll see how that comes out tomorrow, thanks for the help.
Teken 
Gold - Posts: 1,492
Gold spacespace
Joined: August 04, 2002
Location: Aruba
Posted: January 21, 2004 at 6:33 PM / IP Logged  
Please make sure that IF the technicians are testing the battery without the aid of a conductance DMM.
And are simply using the old method of:
1. Measuring the open circuit voltage (OCV). The battery needs to be drained of the surface charge for at least 60 seconds prior to testig. Then, they can measure the voltage. There will be a difference of 0.10 volts due to temperature extremes.
100% = 12.80
75% = 12.50
50% = 12.20
25% = 12.00
0.% = 11.90
========================================================
2. Specific Gravity: When the technician takes a sample of the electrolyte (acid) all cells should be 1/8" below the vent well. If it is not, then ensure that he only fills to that level.
Each cell should be measured, and not simply referenced to one cell. Below is the specific gravity which will tell you the acidic strength content.
100% = 1.265
75% = 1.225
50% = 1.190
25% = 1.155
0. = 1.120
========================================================
3. Load Testing: If your technician intends to load test the unit using a carbon pile battery. Then the battery MUST be fully charged, prior to testing.
Load testing a unsaturated battery which is at a minimal voltage threshold will damage the grids plates within the battery.
Once the battery is fully charged. The unit which he is using must be set to load the target battery at half the CCA of the battery which is indicated on the top.
ie. 500 CCA / 2 = 250 amps
The battery would then be load tested for no longer than 15 seconds. He will then wait aprox 2-3 minutes to see if the battery recovers.
========================================================
4. Qualification: Any of the three tests can be fooled, and if the technician does not know what to see, or understands the reading. You can be stuck with a battery which does not hold a charge.
If upon load testing the battery and the OCV reaches or exceeds 12 volts within a few seconds. This indicates that the battery may be damaged.
If the OCV reaches 12 volts gradually, then it indicates that the battery is used up, or near its service life.
A well maintained SLI battery will only provide a consistent service life 5 years. If you use and purchase higher end batteries such as those AGM deep cycle batteries, you can expect to see at least 6-7 years of service.
The importance of the above information is that, many auto shops will simply disqualify the battery to make a sale.
Either you are present, or bring the unit to a technician you trust, and is known to be fully competant.
The only measuring tool which is 100% accurate in determining a batteries service life is that which used conductance measuring techniques...
Regards
EVIL Teken . . .

Sorry, you can NOT post a reply.
This topic is closed.

  Printable version Printable version Post ReplyPost New Topic
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum

  •  
Search the12volt.com
Follow the12volt.com Follow the12volt.com on Facebook
Wednesday, May 15, 2024 • Copyright © 1999-2024 the12volt.com, All Rights Reserved Privacy Policy & Use of Cookies
Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

Secured by Sectigo
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
Support the12volt.com
Top
the12volt.com spacer
the12volt.com spacer