Ghost power draw

[Adamsta]

Best way to track down something that is pulling power when the motor is off... I have had the batteries load tested and they say they are fine.

When I turn off the main power relay to the chassis and leave it for a few days and return to start. The motor starts just fine.

When I do not turn the relay off and come back a few days later they do not have enough to start it.

I have left the relay on for months at a time and never had an issue...

This is what is connected to battery:
Power line to toad
Power line to sub woofer
Not sure what the orange and black are for
And the cables to motor

[thomasd923]

put a test light between the negative post and cable. one fuse at a time until light goes out. I have also seen alternators cause a IO draw, see if it is warm to the touch obviously not running and sitting a few hours

[edfirebird68]

Originally Posted by thomasd923

put a test light between the negative post and cable. one fuse at a time until light goes out. I have also seen alternators cause a IO draw, see if it is warm to the touch obviously not running and sitting a few hours

Exactly! the bulb shows load but you will have insignificant loads too like clocks,radios,.... same principal but use a fluke meter on 10A in line and you can find the exact culprit. plus alternators and starters stay warm if their the draw(works better in winter to check by feel)
Ed