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How to find parasitic voltage leak at batt fuse on 2000 GMC Safari

Tiny
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  • 2000 GMC SAFARI
Have a parasitic voltage leak at batt fuse on 2000 Safari. Can not find wiring info to know how to track the issue down.
Tuesday, January 3rd, 2012 AT 12:35 AM

18 Replies

Tiny
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So the fuse is labeled batt?
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Tuesday, January 3rd, 2012 AT 12:37 AM
Tiny
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According to the owners manual it is called "batt fuse" It is under the hood in the bank of fuses located toward the rear of the engine compartment.
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Tuesday, January 3rd, 2012 AT 12:43 AM
Tiny
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So when you pull that fuse the excessive draw goes away?
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Tuesday, January 3rd, 2012 AT 12:59 AM
Tiny
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Yes
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Tuesday, January 3rd, 2012 AT 1:03 AM
Tiny
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I have checked all the fuses under the dash and under the hood and this is the only one that the excessive draw changes on. I just can't find anything to show me how to trace it to the source of the leak.
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Tuesday, January 3rd, 2012 AT 1:40 AM
Tiny
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That circuit feeds the inside fuse box also thats a big feed I posted some info on what it feeds. Also what is the draw your reading?
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Tuesday, January 3rd, 2012 AT 8:20 PM
Tiny
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The reading is.72 amp on that fuse
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Tuesday, January 3rd, 2012 AT 10:56 PM
Tiny
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So is your battery just going dead while sitting over night?
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Tuesday, January 3rd, 2012 AT 11:00 PM
Tiny
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Yes sometimes before overnight. I.E. I park it at work at 9AM - If I don't start it by 3PM it will not start at 7PM. Have checked voltage on charger and if not charged overnight it loses at least 20 percent of charge
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Tuesday, January 3rd, 2012 AT 11:09 PM
Tiny
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I have even seen window switches cause parastic draw before so sometimes you really have to check everything.
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Tuesday, January 3rd, 2012 AT 11:18 PM
Tiny
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That brings to mind that a while back my door lock quit locking automatically like it used to when I got up to a certain speed. Do you think that could be related also? I'm not sure how to check all this stuff out. Is there a good online guide I can find?
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Tuesday, January 3rd, 2012 AT 11:22 PM
Tiny
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The auto lock is a certain program it could have just got programed differently. As far as the switch etc you just unplug parts and watch how it effects the draw on the system. Thats how I found that window switch draw.
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Tuesday, January 3rd, 2012 AT 11:44 PM
Tiny
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Will try your suggestion tomorrow. Also, you said something about the auto lock being a program and it might have gotten programed differently. How can I check what the program is on it?
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Tuesday, January 3rd, 2012 AT 11:59 PM
Tiny
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Try holding the door lock button down for 5 seconds see if the horn honks or the locks cycle.
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Wednesday, January 4th, 2012 AT 2:24 AM
Tiny
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Held the door lock button down for 5 seconds and nothing happened. Tried it both with the key turned on and off.
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Wednesday, January 4th, 2012 AT 3:05 AM
Tiny
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Then it probably requires the tech2 scan tool which is what the gm dealer uses. Unless it mentions it in your owners manual my info dont say how to program it.
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Wednesday, January 4th, 2012 AT 3:11 AM
Tiny
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OK thank you
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Wednesday, January 4th, 2012 AT 3:13 AM
Tiny
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Update - have tracked the voltage drain to fuse #19 under dash. I unplugged it and drain went away. Unplugged radio and overhead console and drain still there. I made a tool to plug into fuse socket with wire attached and inline 10 amp fuse, put it on an external switch and turn switch off. Drain goes away. If I remember to turn this off every time I shut off car it restarts with no problems. Then I turn it back on to get the gages and whatever else it controls to work. Need to find more info on where to go from here.
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Monday, February 6th, 2012 AT 6:07 PM

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