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1998 Chevrolet Blazer battery drain

Tiny
MAILIBU1955
  • MEMBER
  • 1998 CHEVROLET BLAZER
  • 165,000 MILES
After sitting for about 4 to 7 days the battery is run down. I'm sure there is no lights on. Please help. Thanks, Bob Additional info. There is a spark when the neg. Battery cable is put back on. What ever it is it must be interesting repair to this model Chev. As I said there is no lights on.
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Friday, May 31st, 2013 AT 5:02 PM

26 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
PUT AN AMP METER BETWEEN THE BATTERY POS AND CABLE, START PULLING FUSES TO SEE WHICH CIRCUIT IS DRAWING EXCESS POWER.
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Sunday, June 2nd, 2013 AT 5:08 AM
Tiny
MAILIBU1955
  • MEMBER
  • 76 POSTS
I don't have a amp meter. I have a dim light showing on my test light. I secured the door dome light switch. Each fuse was pulled one at a time(under the hood and from the dash panel). The light stayed dime. I do get a sizable spark when the neg. Cable is re attached. Thanks for your help.
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Tuesday, June 4th, 2013 AT 3:45 PM
Tiny
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Invest in a multi meter they are not expensive and this will help with all manner of electrical problems you encounter with the car.
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Wednesday, June 5th, 2013 AT 3:43 AM
Tiny
MAILIBU1955
  • MEMBER
  • 76 POSTS
Thanks for the info. I'll get one this week. By the I'm from Portland, Maine.
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Wednesday, June 5th, 2013 AT 4:37 PM
Tiny
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OK, if you get stuck, post again.
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Thursday, June 6th, 2013 AT 3:00 AM
Tiny
MAILIBU1955
  • MEMBER
  • 76 POSTS
Based on what I've explained do you have any suggestions? I just believe I'm missing something simple.
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Thursday, June 6th, 2013 AT 4:46 PM
Tiny
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You may have a faulty alternator, do the amp meter test and remove the alternator feed wire, a blown diode can also cause this.
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Friday, June 7th, 2013 AT 3:35 PM
Tiny
MAILIBU1955
  • MEMBER
  • 76 POSTS
I'm excited about this as I think you are on to something, Thanks
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Friday, June 7th, 2013 AT 4:40 PM
Tiny
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Ok
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Friday, June 7th, 2013 AT 10:06 PM
Tiny
MAILIBU1955
  • MEMBER
  • 76 POSTS
I really believed you were on to something. I disconnected everything attached to the alternator, the light remains on.I've ordered an amp meter on line and should be receiving it soon. In the meantime while I wait for the meter, if maybe you have one more suggestion it would be great. Thanks
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Saturday, June 8th, 2013 AT 1:58 PM
Tiny
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Just do the amp meter test and let me know what you find.
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Sunday, June 9th, 2013 AT 5:15 AM
Tiny
MAILIBU1955
  • MEMBER
  • 76 POSTS
After receiving the meter I attached it between the negative cable and battery. I started pulling fuses and I had a two plus volt drop when I pulled the fuse for the TBC 10 amp fuse. There is no longer a spark when the cable is touched to the battery. My problem now is I can't find out what TBC stands for. I've look in my Chev. Shop manual with no reference. Please assist. Thanks, Bob PS. This fuse is in the engine compartment.
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Thursday, June 13th, 2013 AT 2:30 PM
Tiny
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TBC I truck body control module, located behind dash mounted on the heater this module may be faulty.
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Friday, June 14th, 2013 AT 4:38 AM
Tiny
MAILIBU1955
  • MEMBER
  • 76 POSTS
The trk. Body control module is faulty. Thank you so much for your help. Bob
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Monday, June 17th, 2013 AT 4:59 PM
Tiny
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Good work, thank you for using 2carpros.
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Wednesday, June 19th, 2013 AT 3:54 AM
Tiny
MAILIBU1955
  • MEMBER
  • 76 POSTS
I need your help. After putting the fuses back in place I tried starting the engine. The engine starts and as soon as I let go of the key the it stalls. As long as I spray ether in the intake it continues to run.I've checked the fuel pump operation and it is fine. The fuel filter is clear also. I've checked all the fuses and exchanged the fuel pump relay. Please help. Bob
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Friday, June 28th, 2013 AT 1:13 PM
Tiny
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Check that the injectors are pulsing with a noid light or an led test light
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Friday, June 28th, 2013 AT 3:35 PM
Tiny
MAILIBU1955
  • MEMBER
  • 76 POSTS
Some vehicle information, 1998 Chev. Blazer 4.3 engine 4/4. It has multiport fuel injection system. I gone my hands on a noid light. With it's attached and cranking the engine the light went on and off as it should. I cracked the fuel bleeder valve near the CSEFI fuel meter body and there was plenty of fuel. The last thing I've done was to slowly pour fuel into the intake. As long as the fuel was flowing the engine continued to run. I have no failure codes. I really need your assistance. Thanks. Bob
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Sunday, June 30th, 2013 AT 3:41 PM
Tiny
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Is fuel pressure at correct level, low pressure will be a problem as you will see flow if you crack the line but it may not be enough to get a good spray from the injectors.
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Thursday, July 4th, 2013 AT 4:18 AM
Tiny
MAILIBU1955
  • MEMBER
  • 76 POSTS
I've attached a meter to the fuel line an the pressure is 60 lbs. After sitting for a while it read 35 lbs. This is rally driving me nuts. We've owned this Blazer for about five years with out a problem. Thanks again for your help.
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Thursday, July 4th, 2013 AT 5:29 PM

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