Battery Drain of about 1.5 Amp. Internal fuse #5 pulled solves Drain (30ma).
Anyone have a schematic for this truck?
What device/s are connected to this fuse?
Any history on this fault?
Thanks.

 

Welcome to FTE!

Below you'll find the page of your owner's guide that lists your fuses. Looks like number 5 has to do with your brake-shift interlock and "SPBJB", which I *think* is your body control module.

Unfortunately I don't know where to go with this one. Sorry I couldn't be more helpful.

 

I've been having the same problem on my 08'-----my battery started going down after the truck had been sitting about four days----It started after I was fooling around with the radio, trying to get a CD out that it ate----there are two fuses marked radio, one 5 amp, one 30 amp, I pulled them both a few days ago-----battery has not gone down since. If you have the owner's manual, there is a diagram of the fuses and the number of each and what they go to-----if you don't have one, I'll look it up for you----good luck, Dennis

 

Thanks lads. I did review that page, I can't drive it without the this fuse in, it supplies power to a few devices via the brake system. Can pull it out when parked. I need to troubleshoot the devices connected to see which one is draining the Batt. I may have found someone on another site with the 2008 diagrams, hoping he is still online. V~

 

Unfortunately if it's the central junction box you're gonna have a tough time troubleshooting it. It's the brain of your truck and is connected to a lot of different systems.

 

You are right, I was looking at a diagram for a similiar model, and there was about 6 modules powered via that fuse, via the brake pedal switch, when it is depressed, etc. (brake-interlock, PCM, etc.) Then you got to figure out where the modules are physically located.

 

We are having the same issue on ours.


Draw is .188 with fuse 5 in
Draw is .002 with fuse 5 out


Does anyone have a solution? Know exactly what SPBJB stands for? Know how we can diagnose if it is in the BSI?


Thanks for any help here.

 

Not really sure what the SPBJB comes from. Just pulled the owner's guide and there are only two options it could be. Either the brake-shift interlock or keypad illumination, which yours shouldn't have.

Unless, of course, you're talking about fuse 5 under the hood, which could be the integrated trailer brake controller.

 

What was the outcome????

 

Oh yea, thanks for the reminder. Simple fix;

One of the batteries was bad and draining the other. Lesson learned, just replace both batteries.

Just happened to another friend of mine last week, replaced both batteries, just like new again. No messing around for 3 more years.

You can test the batteries to see which one is bad and replace one, but 6 months down the road, you are at it again. (it may be the one that is very hot)

If you disconnect the bad battery, your drain issue may disappear (assuming you have 2 batteries).

I just went thru the process of elimination. I put the amp meter in line with the Negative terminal and post. then started pulling the fuses one at a time, when I pulled Internal #5, the draw went from 1.5 amps to .040 amps, and when everything went to sleep, it dropped to .020 amps, or 20ma. I never took the time to understand why the removal of the fuse solve the problem, I assume it was a path from one battery to the other.

I'll see if I can find it again; the proper procedure for measuring the drain. Proper drain can be measured once the computer goes to sleep.

http://www.wikihow.com/Find-a-Parasitic-Battery-Drain

I assume you have checked the output of your alternator/s 14.? volts?

 

This issue is in connection with a ground wire not having good connection or not connected at all. Brake shift interlock switch located at the bottom of the shifter handle has a 3 prong plug connected to it. The green wire (#2) is the ground. SPlice into this using another wire and ground it to the frame. This should temporarily fix power drain issue. . . Until youve found the ungrounded wire. . . or just leave it . Unable to upload pictures but PM me if anyone needs further explanation.

 

This issue is in connection with a ground wire not having good connection or not connected at all. Brake shift interlock switch located at the bottom of the shifter handle has a 3 prong plug connected to it. The green wire (#2) is the ground. SPlice into this using another wire and ground it to the frame. This should temporarily fix power drain issue. . . Until youve found the ungrounded wire. . . or just leave it . Unable to upload pictures but PM me if anyone needs further explanation.