Jump to content

Parasitic battery drain (again)

Tim968

Recommended Posts

Tim968 New Member

Tim968

Posted
Posted

Hi, chasing parasitic battery drain in my son's truck 2002 Chev Silv-1500 4.3TBI Canadian spec. With engine off, doors unlocked but closed, all exterior lamps off, after 5 minutes, battery draw is about 1.3 Amps. Started pulling fuses and found the following parasitic drains;

  1. EXP LPS (10A) losing about 0.2 Amps
  2. RADIO (15A) losing about 1.0 Amps
  3. TBC (10A) losing about 0.1 Amps

Questions (2);

What is the description of "EXP LPS" - which lamps are these?

What is the description of "TBC" - what is the description name of this circuit?

 

Note, even with key removed from ignition, the (antitheft???) chime rings as long as the drivers door is open, hmm; very strange...

 

All replies, suggestions and advice welcome, Thanks for helping this noob.

I wish there was a search function in the forum to find the answer, as I expect you guys have already been where I am at.

 

Thanks, Tim

Coby7 Senior Enthusiast

Coby7

Posted
Posted
RADIO Fuse #46

15A

Radio and Instrument Cluster


Obviously your radio shouldn't be drawing 1 amp if it's ''OFF'' but the instrument clusters have been known to go bad and draw current.


EXP LPS Fuse #56

10A

Not Used


TBC Fuse #60

10A

Body Control Module

Coby7 Senior Enthusiast

Coby7

Posted
Posted

Next time just unplug the cluster to see if the major current drop is there.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • newdude
      2 speed transfer case optional now?

      By newdude · Posted

      This is a 1/2 ton thing ONLY.  All HDs 2020-2026 have the two speed transfer case, with Autotrac as an option.     1/2 tons 2019-2026, regular 4x4s come with a single speed case (no 4LO!), and trucks with Z71 ordered, or all Trail Boss trucks come with the 2 speed case.  2 speed case is also an option on WT, and is also standard on High Country.  
    • newdude
      Different requirements for oil filters?

      By newdude · Posted

      2013 5.3 still to this day calls for the PF48 filter.  Which as a 15psi bypass pressure.     There is a TSB, 17-NA-157 that talks about the PF-63 and PF-64 filters which have a higher bypass rating of 22psi.    TSB HERE - temp.xml   "Beginning in 2012, the oil pumps began to regulate main gallery feedback instead of pump out pressure. This means that the oil pump now does not begin to regulate until pressure is built up to the main gallery. This change reduces the amount of time it takes to provide oil to the engine bearing and lifters during extreme cold start conditions.  Main gallery feedback oil pump control systems are present on the following engine families which use Spin-on oil filters: Small Gas Engine (SGE), Large Gas Engine (LGE), High Feature (HFV6) Gen2 and Small Block Gen5 gasoline engines. These engines with the main gallery feedback oil pump control systems are factory built with an ACDelco® oil filters"   It also calls out what engines use those filters.  The gen 4 small blocks were not on that list (LMG, LC9, L9H, L92, L94, L20, L96).  Gen 5 small blocks use the higher pressure filter.          That all said...   Your 7045 Napa filter is the PF63 equivalent, with 22psi bypass.  You are already using the higher bypass pressure filter.  You CAN keep using it, you don't technically have to use it though.  
    • Grumpy Bear
      Different requirements for oil filters?

      By Grumpy Bear · Posted

      Do you know WHY the filter relief setting was increased to 22 psig?    When the new system goes into the second stage the pump volume ramps up considerably. It was found that the 15 psi filter bypass setting put the filter in bypass on a warm engine when the second stage was activated. Raising the filter bypass setting forced the filter to do what it designed to do. Filter. Preventing debris from circulating during high load, high rpm operation.    So next question is how did GM find this out? VLOM/lifter failures and a deep dive by Melling Corp.    Last question. Is it required? Look at it like this; a motor may be equipped with a rev limiter. But it only works if the set point in reached. That 22 psig setting only matters if the pressure differential across the filter media exceeds 15 psig during normal warm operation. Second stage kicks in around 3000-3500 rpm.    I can't answer your question because I don't know you and how you use the truck. But I think there is enough information here to let you decide for yourself. 😉
    • Coastie05
      give me some tips to make my truck look better

      By Coastie05 · Posted

      Go back to OEM wheels. 
    • newdude
      2020 Trailboss 6.2 replacement

      By newdude · Posted

      Probably not their first rodeo, so it should go as planned most likely.  Typically the service manager or tech doing the swap will put some seat time to shake it down after they get it all put back together.  We usually put 50-100mi before we hand them back so if something happens, its not after you get it.  A coolant leaks, oil leaks, a ground left off or loose, vibration, etc.     The new engines so far have been good?  There's been a couple that have popped out there again (the replacement engine) but most have been okay.  

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...