C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Battery drain

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Old Mar 20, 2017 | 10:43 AM
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Default Battery drain

I have a 1.5 A draw on the battery in my '85. I have already pulled all the fuses, the light did not go out. This just started a couple months ago so I am at this point kinds lost as to my next step. Any electrical guys have any tips?
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Old Mar 20, 2017 | 10:52 AM
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alternator.
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Old Mar 20, 2017 | 11:05 AM
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Originally Posted by Midnight 85
I have a 1.5 A draw on the battery in my '85. I have already pulled all the fuses, the light did not go out. This just started a couple months ago so I am at this point kinds lost as to my next step. Any electrical guys have any tips?
With an '85 it's not as easy as I believe the '86 and later because all of the fusible links are either direct from the battery or directly from the battery + cable @ the starter. There's no 'jump block' behind the battery. I believe that IHBD (I Hate Barking Dogs) is an '85 owner and mentions being quite knowledgeable regarding electrical diagnostics so maybe you wait and expect him to post to the thread with a 'procedure' that might do you well.

If you've done the diagnostics to this point to establish the parasitic draw and checked the obvious maybe you post what you've done to establish the draw and what you feel you've checked satisfactory!

Do you have and understand the FSM?

Last edited by WVZR-1; Mar 20, 2017 at 11:46 AM.
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Old Mar 20, 2017 | 01:04 PM
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Originally Posted by Midnight 85
I have a 1.5 A draw on the battery in my '85. I have already pulled all the fuses, the light did not go out. This just started a couple months ago so I am at this point kinds lost as to my next step. Any electrical guys have any tips?
How did you measure the drop.
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Old Mar 20, 2017 | 01:37 PM
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Originally Posted by Midnight 85
the light did not go out.
What light?

Originally Posted by hope2
alternator.
Could be. Try disconnecting it.

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Old Mar 20, 2017 | 04:10 PM
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Mark up one more stupid assed mistake on my list. When I changed the heated O2 sensor a while back, somehow I got the wires crossed, that also explains some other things I have been working on too. Thanks to all who answered and yes WVZR1 I do have the fsm and I do understand it. I appreciate you asking
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