Battery drain

[cd_indy]

I'm having problems with a slow battery drain on my '96 230. I don't have a master switch on the battery. At first, I thought maybe I had left something on... like the radio or fan. But, that isn't it Any suggestions on what might be the culprit?

 

[CliffA]

I'm having problems with a slow battery drain on my '96 230. I don't have a master switch on the battery. At first, I thought maybe I had left something on... like the radio or fan. But, that isn't it Any suggestions on what might be the culprit?

you can use an ammeter and fuse pulling method to identify which circuit is draining the battery....then you have to identify which component on that circuit is the culprit....

cliff

https://www.wikihow.com/Find-a-Parasitic-Battery-Drain

 

[Little Ducky]

Good trouble shooting video.

 

[Wylie_Tunes]

Have you proven its parasitic draw and not a battery issue? That'd be my step 1.

 

[atrick]

could be the voltage regulator going, it will drain a battery when the diodes start going but still charge the battery correctly, happened on my 21' boat, the dump truck and the loader when they went.

 

[cd_indy]

could be the voltage regulator going, it will drain a battery when the diodes start going but still charge the battery correctly, happened on my 21' boat, the dump truck and the loader when they went.

Really? Any idea how you check for that?

 

[Wylie_Tunes]

You can track a draw down to the alternator much like tracking it to any other component.

 

[cd_indy]

I am pretty sure it is a dodgy bilge pump switch.

 

[electricaldoctor]

I am pretty sure it is a dodgy bilge pump switch.

A switch is not a load. Does the load that you are trying to track down show up on your DC amp meter? If so, keep shutting down your DC breakers one by one until you find the culprit. If it does not show up on your boat's amp meter, disconnect your negative battery lead and series your multi-meter between the negative battery cable and the negative post on your battery to measure the draw and go from there.