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#1
10-05-2006, 02:00 PM
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Blazer Electrical Leak
 My father has an electrical leak on his Blazer... I believe it is a 2000? V6. His battery went dead at the airport. He took it back to Walmart and they did an electrical check... They told him he had a parasitic electrical leak... He is a Mechanical engineer and did some testing on his own and found that it was drawing significant current when the vehicle was off... Is there anything common on a Blazer that can fail and cause a short? Regards, Redbug 
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#2
10-05-2006, 02:13 PM
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Re: Blazer Electrical Leak
Monitor the current drain and pull one fuse at a time to see when the draw stops.
Then you will have isolated the circuit.
__________________
1995 Factory Blazer Service Manual for sale, PM if interested.
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#3
10-05-2006, 02:21 PM
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Re: Blazer Electrical Leak
Well I don't know about your Dad but I went through this awhile back but it did not take me long to find. It was the wires to my kicker in the back had got grounded against each other when I loaded a fender in there and had to push a few things around and let the seats down. Killed one battery,found the problem then had to replace the alternator. Does the pos cable spark a lot when you hook it up. I know all lights are suppose to go out after 20 mins but one guy I knew with a Chevy PU '98 the light under the hood was not going off and it was killing his battery only if he was not driving it like over the week end.
__________________
 '99 Blazer LT Loaded, K&N Filter, Pioneer Super Tuner,Viper '98 Pontiac Grand Prix GT, 3.8 '88 K1500 Cheyenne, 5.0, stock, bought new '86 Nissan 720 Trash Truck '69 C/10 step side, 307, all original, second owner, in process of restore. The person who says it cannot be done should not interrurt the person doing it. Share your knowledge. It is a way to achieve immortality. Allen- Paintman Wrenchtwister Broompusher
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#4
10-05-2006, 02:33 PM
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Re: Blazer Electrical Leak
Quote:
How many amps is it pulling? Also wait about 10-20 minutes after key off for all PCM to power down before testing. Any add on or aftermarket stuff on it? Raidos, dome light switches, cig lighters,alternators,auto head lights and computers and many things can be drawing to many amps. Good luck and. Let us know how it goes. MT
__________________
Remember proper testing gives us the answer to many problems. MT
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#5
10-06-2006, 07:47 AM
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Re: Blazer Electrical Leak
OK, thanks, I will report the ideas to my father. Found that the blazer is a 1999. I believe he did pull one of the fuses and the power did stop draining... I will get more details....
Regards, redbug 2006 Civic 1985 F250 Diesel (Trailer Puller) 2003 Accord (wife) 1990 Accord (daughter) 1965 porsche 911 (mothballed) 1995 Isuzu with blown engine (I miss this SUV)
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#6
02-12-2009, 10:26 PM
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Re: Blazer Electrical Leak
As the others have stated there are many things that can cause a battery to go dead. I just found one today. After months of trying to find without success a cause on my 2000 Blazer I tried to use jumper cables to start it. I first noticed it drew a large amount of power, sparks whem hooking up the jumper cable. I also heard a ticking noise near the drivers side fender. On inspection I found the ABS system was cycling. The truck would not go and the cables started to get rather warm. I dissconnected the jumper cables and took the motor plug aff the ABS system. I re-connected the jumper cables and the truck started. NOw all I have to do is find out why the ABS system is turning on.
This may not be your problem,. but is one of many you should check out. Ken
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#7
02-13-2009, 12:12 PM
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Re: Blazer Electrical Leak
Quote:
Thanks for info. But this post is 3 years old. Always check date on a post before replying back to it. If it is old let it stay dead and lay there in peace.
__________________
Remember proper testing gives us the answer to many problems. MT
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