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drain test matter
09-27-2014, 05:08 PM (This post was last modified: 09-27-2014 05:09 PM by myispheres.)
Post: #1
drain test matter
I had a full system test done battery good charging system good cranking no problem. drain test shows 1.60 A suspect .also I do see the headlights flicker some times at night where i park is a wall and my in side lights some times they get dime and return to normal its a 1999 blazer 4wd so they say alt starter battery is all good working fine any help i thank you for on this matter
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09-27-2014, 10:29 PM
Post: #2
RE: drain test matter
So, what is the question? I know enough about an S-10 Blazer to fill volumes but I don't want to write a book if I don't have to.

Perhaps there are several questions that you need to break down but it's not really clear to me.
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09-27-2014, 11:31 PM
Post: #3
RE: drain test matter
my ? is what the drain test showed a 1.60 amp drain what cause it i thought my battery was bad so they did a test battery good starters good alt good all is normal except the drain test shows a 1.60 amp which drains my battery they said some thing draining the battery what could be the cause
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09-28-2014, 12:18 AM
Post: #4
RE: drain test matter
It would be much easier to get the real meaning from your posts if there was some punctuation between thoughts, but I will try to figure it out.

The Blazer is an oddity in that many things ore on a timer or delay. (well, many newer cars do that) The problem is trying to find excess draw when we already know the dome light, the headlights, and a few other things will be on for 10 seconds or 3 minutes after the key is switched off. On top of that the ECM and the radio both have a powered memory that's active all the time. About the only thing you can do is start pulling fuses and relays till the draw goes away then make an educated guess at what's too much. In my book there should be no more than a few hundred miliamps tops.

Oh, an alternator with a failing diode can charge ok but that bad diode can draw a few amps. IOW, if you have everything else disconnected and there's still a draw then try pulling all of those wires too.

One other thing... if the headlights ficker totally off (not just dim) then you probably have a bad headlight switch. It's common enough that it's available in the aftermarket.

BTW, please post all questions in the forum. I will not answer technical things in a PM.
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