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1970 vette battery drain

dalebenz

Member
Joined
Apr 19, 2015
Messages
6
Location
janesville
Corvette
1970 rd 1968dark green
when i pull the clk,litr,ctsy fuse ,which is the upper left fuse,. the draw goes away.any body no what all goes on that fuse,Ive pulled the liter,all 3 courtesy lamps,radio,clock.and glove compartment light
 
Last edited:

gmjunkie

Well-known member
Joined
Nov 11, 2004
Messages
4,519
Location
Old Fort NC/Vero Beach FL
Corvette
03 Z-51,78 L82 Coupe
How big of drain?
 

dalebenz

Member
Joined
Apr 19, 2015
Messages
6
Location
janesville
Corvette
1970 rd 1968dark green
Idont know but a 12 volt tester lights up when i connect between the neg post and the neg cable
 

gmjunkie

Well-known member
Joined
Nov 11, 2004
Messages
4,519
Location
Old Fort NC/Vero Beach FL
Corvette
03 Z-51,78 L82 Coupe
Just about any vehicle will do that,You need to test the drain with a VOM.
 

stevolwevol

Well-known member
Joined
May 28, 2015
Messages
239
Location
Michigan
Corvette
1977 light blue
when i pull the clk,litr,ctsy fuse ,which is the upper left fuse,. the draw goes away.any body no what all goes on that fuse,Ive pulled the liter,all 3 courtesy lamps,radio,clock.and glove compartment light
One place to check is your spare tire area. There is a light bulb that could be on, but you can't see it till you remove your spare.
 

dalebenz

Member
Joined
Apr 19, 2015
Messages
6
Location
janesville
Corvette
1970 rd 1968dark green
i understand ,if key is out of ignition,no switches on, radio off,courtesy lights off, emer brake off,doors closed,all accessories off,lighter out,clock disconnected ,glove box light disconnected their should be no parasitic battery drain between neg cable and neg post but I do.I have no light back by the spare tire area
 
Joined
Oct 20, 2008
Messages
923
Location
Portage, Indiana
Corvette
2010 Grand Sport Vert JS Blue
Disconnect the alternator from the system, when I was at a GM garage I saw many bad diode-trios cause a drain.
 

Tom Bryant

Well-known member
Administrator
Joined
Nov 9, 2000
Messages
7,197
Location
Edgerton, Ohio, United States
Corvette
1959 black 270hp (9/2/69) 1981 Beige L81(10/20/80)
I forgot about that. Diode Trios went across the parts counter almost as fast as brush sets and ignition points back then.

Tom
 

gmjunkie

Well-known member
Joined
Nov 11, 2004
Messages
4,519
Location
Old Fort NC/Vero Beach FL
Corvette
03 Z-51,78 L82 Coupe
Problem with the diode trio would be pulling the
clk,litr,ctsy fuse wouldn't change the drain. Alt is on a different circuit.
 

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