Jump to content
  • Sign up for FREE! Become a GM-Trucks.com Member Today!

    In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. 

Do I have a parasitic drain?


Recommended Posts

Hi all, my 2010 Silverado WT 4.8L with a new battery will go flat in around 4-5 days and will not start without a jump.

If I start it everyday or every other day, no issue.

When charged, the battery reads around 12.34V+/- and with engine running around 14.5-14.7V.

 I did an amperage draw with a multimeter with everything shutoff and I get a 1.4-1.5A draw.

Before I start to pull fuses one by one, is this a normal amp draw for a stripped down vehicle like my WT?

No power anything. Just the ECU.

Your thoughts.

 

 

Link to comment
Share on other sites

Ok let me add this to my topic.

There is an on/off switch in my upper console that is there for a roof beacon light should I chose to utilize it.

I do have the Snow Prep Pkg.

The small amber light in the rocker switch  will go on if I press the switch.

I just noticed that it had been left on.

Would this small light be the cause for the amp drain?

It is so small, it could be un-noticed.

Link to comment
Share on other sites

A vehicle equipped with RPO VYU (Snow Plow Provision Package) or TRW (Provisions For Roof Mounted Lamp) may not have the roof beacon light connected. If the customer were to inadvertently press the roof beacon switch to the on position the roof beacon indicator will illuminate on the switch. If the ignition is turned off and the beacon switch is left on a battery draw (140-180 Ma) will occur. The roof beacon switch indicator will no longer illuminate when the key is turned off however the roof beacon relay is still energized. It's suggested that the roof beacon switch be turned off before turning the ignition off to avoid a battery drain.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

Link to comment
Share on other sites

13 hours ago, tbarn said:

A vehicle equipped with RPO VYU (Snow Plow Provision Package) or TRW (Provisions For Roof Mounted Lamp) may not have the roof beacon light connected. If the customer were to inadvertently press the roof beacon switch to the on position the roof beacon indicator will illuminate on the switch. If the ignition is turned off and the beacon switch is left on a battery draw (140-180 Ma) will occur. The roof beacon switch indicator will no longer illuminate when the key is turned off however the roof beacon relay is still energized. It's suggested that the roof beacon switch be turned off before turning the ignition off to avoid a battery drain.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

Thank you for responding.

I think I understand what you wrote.

Based on your experience, do you feel that a battery draw of 140-280 Ma is enough to drain a new battery in 4-5 days?

I can’t seem to get an answer to this.

Link to comment
Share on other sites

  • The battery run down time will vary depending on the batteries reserve capacity. If the reserve capacity is higher, then the battery run down time may be longer. If the reserve capacity is lower, then the battery run down time may be shorter. The graph below indicates roughly how many days a 690 cold cranking amperage battery with a 110 min. reserve capacity starting at 80 percent state of charge will last with a constant current draw until it reaches 50 percent state of charge. Differences in battery reserve capacity and temperature will affect the results.

Current Drain

Days

25 mA

33

50 mA

16.5

75 mA

11

100 mA

8.25

250 mA

3.3

500 mA

1.65

750 mA

1

1 A

0.8

2 A

0.4

Intermittent Draws

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share



×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.