I am suspecting that my car has a short circuit, it drains the battery in a short period of time. I have changed the battery thinking it was the issue. Now i hooked up this circuit tester to the battery negative terminal and body, and the light on the tester came on. I removed fuses one at a time but the light never went off. What other ways can i test for short circuits?
Mercedes c320 v6 2001 with 260k km
Did you check all the fuses in your cabin fuse box too?
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Hi InThrustWeTrust, its a c320 v6 2001 with 260k km. Yes i did take out each an every fuse one by one. There is a fuse box in the boot, another on the drivers side inside the cabin and another in the engine. I checked each one of them
Thanks I will check out these videos
Good luck.
I'm suspicious of how you connected your circuit tester? Was one end connected to the body/chassis and the other on the negative terminal? If so, then both ends are connected to the same point.
How long does it seem to drain the battery? My other thought is an alternator or charging system issue.
Outside of that, I think the videos linked by InThrustWeTrust are great resources to start with.
Hi AfroGeezy, thanks. I will check out the videos. Thats exactly how i connected the circuit tester. One end to the battery negative terminal and the other end to the chassis. To put it simply, i just extended the negative terminal of the battery with a circuit tester. What should be the ideal way to connect the tester?
Ok start with those videos... If your tester is the type I'm imagining, I would suggest that you connect the clip end of your tester to the positive terminal and touch the probe to any points closer to where you suspect the short(accidentally connected to the negative). If your test light illuminates then you do have a short. As you know, the goal with your test light for this application is not to have the test light come on and the negative end of the battery is always connected directly to ground anyway, so with your method the light would/should always turn on. I hope this made some sense.
This video should clear the test I'm describing:
https://www.youtube.com/watch?v=M4LGykZiRtY
Another option is to use a multimeter if you have one.
Did you disconnect all cables from the negative battery terminal? What kind of tester are you using?
