| Testing for battery drain. [message #365432] |
Wed, 14 July 2021 16:49  |
Larry
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
Karma: 10
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Senior Member |
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My engine battery drains nearly dead in about 5 days. Charge it and disconnect from coach and it looses nothing, Hookied up it will go from 13.4v to 11.5v over a 5 day period. What is the best way to test for parasitic drain?
Larry 
78 Royale w/500 Caddy
Menomonie, WI.
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| [GMCnet] Re: Testing for battery drain. [message #365434 is a reply to message #365432] |
Wed, 14 July 2021 17:05  |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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Put a test light between the negative battery terminal and the negative
lead. If you have a drain the test light will illuminate. Start pulling
fuses one by one while watching the light. The one(s) that makes the light
dim or go out are your issue.
Sully
Bellevue wa
On Wed, Jul 14, 2021 at 2:50 PM Larry wrote:
> My engine battery drains nearly dead in about 5 days. Charge it and
> disconnect from coach and it looses nothing, Hookied up it will go from
> 13.4v to
> 11.5v over a 5 day period. What is the best way to test for parasitic
> drain?
> --
> Larry
> 78 Royale w/500 Caddy
> Menomonie, WI.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| [GMCnet] Re: Testing for battery drain. [message #365440 is a reply to message #365437] |
Wed, 14 July 2021 21:41 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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Used it myself for the first time on my first GMC. Thank you James Hupy.
Sully
Bellevue wa
On Wed, Jul 14, 2021 at 7:18 PM Larry wrote:
> sgltrac wrote on Wed, 14 July 2021 17:05
>> Put a test light between the negative battery terminal and the negative
>> lead. If you have a drain the test light will illuminate. Start pulling
>> fuses one by one while watching the light. The one(s) that makes the
> light
>> dim or go out are your issue.
>>
>> Sully
>> Bellevue wa
>>
>> On Wed, Jul 14, 2021 at 2:50 PM Larry wrote:
>>
>>> My engine battery drains nearly dead in about 5 days. Charge it and
>>> disconnect from coach and it looses nothing, Hookied up it will go
> from
>>> 13.4v to
>>> 11.5v over a 5 day period. What is the best way to test for parasitic
>>> drain?
>>> --
>>> Larry
>>> 78 Royale w/500 Caddy
>>> Menomonie, WI.
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>
> That is exactly what I was looking for! Thanks Sully!!
> --
> Larry
> 78 Royale w/500 Caddy
> Menomonie, WI.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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