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Old 10-13-2022, 11:35 PM
Vettdr Vettdr is offline
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Default Draw on my battery

Just finishing my 67 GTO. I installed new everything, or darn near. Yesterday I went to start the car to take it on a shake down run and the battery was dead. I charged it up and today I put a test light between the pos post and the pos cable. The light lights rather dim for about 2 seconds as it goes dimmer until it goes out. I can do this numerous times with the same result. The only things wired hot are some relays I installed for ignition, a/c, and headlights.Anyone have an idea what's causing this?

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Old 10-14-2022, 05:28 AM
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tigergto tigergto is offline
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Did you have the battery load tested. Even if it’s new it could possibly be bad. Not likely but possible.

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Old 10-14-2022, 08:37 AM
428goat 428goat is offline
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maybe the clock if you have one

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Old 10-14-2022, 09:19 AM
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Replacement radios have a very small "keep alive" current draw for their memories.

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Old 10-14-2022, 11:40 AM
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Sounds kind of like the clock ... if you've ever watched one ... they start up when you apply power and will keep running for a while after you remove power. Kind of like they "charge" up first ... might explain the test light behavior ... but a clock shouldn't drain your battery.

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Old 10-14-2022, 12:28 PM
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Quote:
Originally Posted by tigergto View Post
Did you have the battery load tested. Even if it’s new it could possibly be bad. Not likely but possible.
+1. Make sure you're starting your troubleshooting with a charged, load tested battery. Most parts stores will charge and test batteries for free.

How long had the battery been sitting? Did you have it on a trickle charger? Do you have a DVOM or other troubleshooting tools to find the parasitic draw?

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Old 10-14-2022, 04:24 PM
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What type of Alt are you running… I just found my 9+ year battery drain yesterday… it was how the alt hooked up….wtf

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Old 10-14-2022, 06:16 PM
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Quote:
Originally Posted by 428goat View Post
maybe the clock if you have one
I doubt they were still using them in 1967, but earlier car clocks used a small electric motor to wind a spring that drove the clock. As the spring wound down it would make a set of electrical contacts that provided power to the electric motor. The motor would wind the spring until the contacts opened back up. The motor only ran for a couple of seconds which wound the spring enough for 15 minutes or so of clock run time.

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Old 10-14-2022, 06:22 PM
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Glove box light gave me fits

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Old 10-14-2022, 06:57 PM
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Grab a multi-meter and start testing circuits.

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Old 10-14-2022, 07:55 PM
Vettdr Vettdr is offline
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Ding Ding Ding! We have a winner! Thanks Indymanjoe. You were spot on. Thanks to all that helped with suggestions.

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Old 10-15-2022, 09:11 AM
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Glade you figured out … faster then almost 10 years… it took my slow ass………SMDH

Great help PY!! Love this forum!

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