Jump to content

Large Draw On Radio&tbc Circut(70ma)

tweeder

By tweeder
in Ask A GM Technician

Recommended Posts

tweeder Enthusiast

tweeder

Posted
  • Author
Posted

I could look into the battery run down software upgrade as mine has never worked from day one as far as I can tell. Quite a few years ago I had the same problem with the battery dying under warranty and they traced it back to the BCM and replaced it. That was good for a couple years now this again. But that only solves the problem with not being stranded any more but I still have that draw.

Nick The Great Senior Enthusiast

Nick The Great

Posted
Posted

I'm not any help, but I'm having similar issues with my truck. My battery seemed "weak" for months and finally wouldn't start one morning. So I replaced the battery, and all was good for a week. Then I'd shut the truck off, and I lost all power. I could go "wiggle" the positive cable on the battery, and she'd fire right up.

 

Over the weekend, had the truck in an actual shop, and kinda cleaned up the battery cable; it had a little corrosion on it. Didn't really help. The multimeter showed my battery a little low, so we'd charge it up, and it'd work fine. We were thinking the battery was just low, due to the bad connection on the positive wire.

 

I'm gonna take it to the dealer today or tomorrow. I don't think that TSB is my problem, because when I had my BlackBear tune in November, I would think Justin would have used the latest version. My truck is a 2007 GMT900, so maybe our problems aren't the same?

 

I'll update if I find anything, but I'm not real optimistic. :thumbs:

tweeder Enthusiast

tweeder

Posted
  • Author
Posted
I'm not any help, but I'm having similar issues with my truck. My battery seemed "weak" for months and finally wouldn't start one morning. So I replaced the battery, and all was good for a week. Then I'd shut the truck off, and I lost all power. I could go "wiggle" the positive cable on the battery, and she'd fire right up.

 

Over the weekend, had the truck in an actual shop, and kinda cleaned up the battery cable; it had a little corrosion on it. Didn't really help. The multimeter showed my battery a little low, so we'd charge it up, and it'd work fine. We were thinking the battery was just low, due to the bad connection on the positive wire.

 

I'm gonna take it to the dealer today or tomorrow. I don't think that TSB is my problem, because when I had my BlackBear tune in November, I would think Justin would have used the latest version. My truck is a 2007 GMT900, so maybe our problems aren't the same?

 

I'll update if I find anything, but I'm not real optimistic. :thumbs:

 

 

Yeah i've checked my cables and they're both in great shape. I definately do have a draw as I check it for a draw from time to time and its still pullin 70ma. I was cheching fueses and functions and what i seen is that when I pull the radio fuse(in my owners manual it controls the audio system, instrument cluster, climats control system), the voltage drops and don't come back up but it does when I open the door (70ma voltage) While theres voltage draw present, I pull the TBC fuse(in my owners manual it controls the BCM, remote keyless entry, headlamps) the voltage goes away but comes back when I put the fuse back. What 2 possible items that are linked by the radio and the BCM? I know that when I open the door the security light is flashing in the guage cluster, I checked the guage cluster a while ago by disconnecting it and verified the voltage drop but one day the truck was dead with it disconnected.

Nick The Great Senior Enthusiast

Nick The Great

Posted
Posted
I'm not any help, but I'm having similar issues with my truck. My battery seemed "weak" for months and finally wouldn't start one morning. So I replaced the battery, and all was good for a week. Then I'd shut the truck off, and I lost all power. I could go "wiggle" the positive cable on the battery, and she'd fire right up.

 

Over the weekend, had the truck in an actual shop, and kinda cleaned up the battery cable; it had a little corrosion on it. Didn't really help. The multimeter showed my battery a little low, so we'd charge it up, and it'd work fine. We were thinking the battery was just low, due to the bad connection on the positive wire.

 

I'm gonna take it to the dealer today or tomorrow. I don't think that TSB is my problem, because when I had my BlackBear tune in November, I would think Justin would have used the latest version. My truck is a 2007 GMT900, so maybe our problems aren't the same?

 

I'll update if I find anything, but I'm not real optimistic. :sigh:

 

 

Yeah i've checked my cables and they're both in great shape. I definately do have a draw as I check it for a draw from time to time and its still pullin 70ma. I was cheching fueses and functions and what i seen is that when I pull the radio fuse(in my owners manual it controls the audio system, instrument cluster, climats control system), the voltage drops and don't come back up but it does when I open the door (70ma voltage) While theres voltage draw present, I pull the TBC fuse(in my owners manual it controls the BCM, remote keyless entry, headlamps) the voltage goes away but comes back when I put the fuse back. What 2 possible items that are linked by the radio and the BCM? I know that when I open the door the security light is flashing in the guage cluster, I checked the guage cluster a while ago by disconnecting it and verified the voltage drop but one day the truck was dead with it disconnected.

 

 

I did the 175A Mega fuse check last night. Didn't see any issues there. I haven't really had more than 1 or 2 issues since we cleaned the terminals up. I still may take it to the dealer today, although I imagine they won't find a thing, unless it happens to have a problem right then and there.

 

My multimeter is no good anymore, otherwise I'd try what you're talking. Some fool left it on the ohm-meter overnight. :thumbs: Good excuse to buy a new one, I guess. :lol:

GMTRUCKTECH Enthusiast

GMTRUCKTECH

Posted
Posted
Hi I haven't had any luck on another forum and came across yours via a search, hopefully y'all can help out heres the link of the conversation(mostly me). http://www.performancetrucks.net/forums/sh...ad.php?t=427628

 

When this aftermarket radio was installed who did it and did they keep the factory radio installed some where in the truck so all the other modules can talk to it if not the modules will stay up lookin to commucate with the factory radio causing a draw!

tweeder Enthusiast

tweeder

Posted
  • Author
Posted
Hi I haven't had any luck on another forum and came across yours via a search, hopefully y'all can help out heres the link of the conversation(mostly me). http://www.performancetrucks.net/forums/sh...ad.php?t=427628

 

When this aftermarket radio was installed who did it and did they keep the factory radio installed some where in the truck so all the other modules can talk to it if not the modules will stay up lookin to commucate with the factory radio causing a draw!

 

 

 

Say what???? I did the install myself with connectors to connect into the factory wiring harness. No I have the stocker sittin on the shelf collectin dust. Is there any way to bypass this? I will connect the stocker back and check to see if its drawin still.

tweeder Enthusiast

tweeder

Posted
  • Author
Posted

I called a buddy at the local stereo install shop to ask about a bypass module or something for the stereo. He said that the cars were that way but they didn't do that to the trucks untill 04 or somethin like that. He also said that 70ma wasn't that bad, his vehicle has 140ma at any given time. He also said that with the meter that I have to leave it hooked up for a min or so and that'll give the proper voltage. I assumed that you hook it and what you see after a few seconds when it settles down, is what you got. I mean it would take forever to wait and do that for every fuse. Any way I did it like he said and after about 20 secs, the voltage dropped down to 10ma. That doesn't make sence when it shows 70ma and right away I pull either of teh 2 fuses that show a draw, the voltage goes down to 4ma.

Archived

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

Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.4k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,840
    Total Members
    8,960
    Most Online
    appletrav
    Newest Member
    appletrav
    Joined

  • Who's Online   5 Members, 0 Anonymous, 348 Guests (See full list)

  • 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...