Parasitic Battery Draw

[rccubed]

 

This one has me stumped! I am usually good at wiring probs And I've read most of all the stuff on here about this But.....

1987 MJ plain long bed 6cyl. The draw is 0.02 amp at the full volts of the battery. I unplugged the Alternator with no change.

I unplugged the ECM and it dropped to 0.01 amp. That is the best I could find. I know its not much but it is draining my battery.

Any ideas will be gratefully appreciated!

 

Rccubed

[gogmorgo]

0.02A is not a lot. I don't know if there's a proper spec for an MJ, but as a general rule that's acceptable. A typical group 34 battery in good health should be able to put out that much current for well over a month before you have issues starting. Have you tested the battery?

[89 MJ]

Gosh, I left my truck sit all winter in less than 32 degree weather with the battery hooked up (December-Late March) and it didn’t kill it. 
Is your glovebox light turning off?

[omega_rugal]

50 mA - 80 mA is the acceptable draw

 

mine draws like 10 mA or less, i have striped it of a lot of electric stuff

[rccubed]

On 9/23/2021 at 1:20 PM, gogmorgo said:

0.02A is not a lot. I don't know if there's a proper spec for an MJ, but as a general rule that's acceptable. A typical group 34 battery in good health should be able to put out that much current for well over a month before you have issues starting. Have you tested the battery?

I haven't load tested it, but I plan on that today.

[rccubed]

 

On 9/23/2021 at 9:37 PM, 89 MJ said:

Gosh, I left my truck sit all winter in less than 32 degree weather with the battery hooked up (December-Late March) and it didn’t kill it. 
Is your glovebox light turning off?

No I have removed all the light sources.

[rccubed]

Is there pdf. file on here that has the electrical schematic? If not can anyone suggest someone or place I can get one?

Thanks in advance!

And thanks for everyone that has responded already!!

[JMO413]

 

 

 

[rccubed]

Thanks so much!!

[JMO413]

Welcome. I've referred to it plenty of times.

[gogmorgo]

Did you do a load test on the battery?