Voltage draw
Thread Starter
Pro
Joined: Dec 2004
Posts: 503
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From: Belchertown Massachusetts
Voltage draw
My battery started going dead in my '99 vette if left unattended for a few days. I did a voltage draw test and found I indeed have some component drawing off the battery when everything is shut down. Has anyone had this problem. Any ideas where to start looking.
I do hear a slight buzzing somewhere in the frontend of the car when testing for voltage draw. I'm thinking it could be a relay possibly. Just guessing right now.
Thanks;
Jake T.
I do hear a slight buzzing somewhere in the frontend of the car when testing for voltage draw. I'm thinking it could be a relay possibly. Just guessing right now.
Thanks;
Jake T.
Tech Contributor
Joined: Jan 2007
Posts: 19,116
Likes: 1,038
From: Dyer, IN
My battery started going dead in my '99 vette if left unattended for a few days. I did a voltage draw test and found I indeed have some component drawing off the battery when everything is shut down. Has anyone had this problem. Any ideas where to start looking.
I do hear a slight buzzing somewhere in the frontend of the car when testing for voltage draw. I'm thinking it could be a relay possibly. Just guessing right now.
Thanks;
Jake T.
I do hear a slight buzzing somewhere in the frontend of the car when testing for voltage draw. I'm thinking it could be a relay possibly. Just guessing right now.
Thanks;
Jake T.
http://forums.corvetteforum.com/c5-t...post1567522286
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,396
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Could be a very likely suspect (Headlight Control Module) Monitor your current draw and remove the headlight control fuse (dont have the fues number at work) If the current drops off significantly, thats your issue. They do go bad. If its very warm to the touch, it is most likely bad. Its a current sensing module and if the current sense circuit goes bad, it will continously draw current trying to keep the head light doors shut when the car is OFF.
The module is under the pass side head light on the frame header bar.
BC
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 326
From: CA.
St. Jude Donor '13-'14-'15
ALSO a common draw on 97-99's is the elect seat--They often go bad and will draw power even with the key off--try unplugging the under seat pigtail and see if it helps---
Team Owner
Joined: May 2001
Posts: 36,836
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From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Could be a very likely suspect (Headlight Control Module) Monitor your current draw and remove the headlight control fuse (dont have the fues number at work) If the current drops off significantly, thats your issue. They do go bad. If its very warm to the touch, it is most likely bad. Its a current sensing module and if the current sense circuit goes bad, it will continously draw current trying to keep the head light doors shut when the car is OFF.
The module is under the pass side head light on the frame header bar.
BC
There's a 5PDT relay inside that can raise a ruckus when all those contacts start snapping back and forth.
