how much resistance from positive terminal to ground

I have been having bad luck with batteries Im pretty sure that my charging system is working correctly as the battery is absolutely worthness now and the bike will run all day once jumped with no problems. this should indicate that the altenator is good.

The battery will last for awhile when its new, but after the bike sits for a week it needs charged again. The battery is toast now and wont hold a charge

I have checked the resistance from the positive batery terminal to ground (with the bike off) and have found approximatly 31K ohms of resistance this doesnt seem right. The only thing that the battery directly connects to with the ignition turned off is the rectifier. Is my rectifier going bad? there should be infinate resistance between the postitive terminal and ground right? has this been whats killing my batteries? how do I test the rectifier?

If you dont know at least test the resistance from your positive terminal to a ground on the bike and tell me what resistance you get so I can compare it to mine.

92 xj600 seca II bout 20,000mi

 

:!: you just fried your meter 8O

never check resistance when dealing with voltage!!! disconnect the battery, then check resistance using the cable ends rather than battery terminals.

there should be no resistance from the ground cable to the engine, with key off i would think there should be an open circuit on the positive side to ground.

 

my bad positive battery lead to ground is 31K ohms

dont worry my fluke is ok

 

is that reading with or without voltage pumping through your meter? fluke or not, fried or not, its not reading correct resistance with voltage present on the circuit.

key on or off?
starter button pressed?
what are you trying to test going from positive to ground?

 

Unhook the negative terminal and place your meter in series with the cable and negative battery terminal. The meter should be set to measure Amps (10A). If you've got no draw, your meter should read zero. If you have any draw, it'll show on your meter. If you do have a reading, start popping fuses until your meter zeros. This will get you onto the offending circuit.

 

no resistance and open circuits are 180 degrees apart...

an open circuit is one that would have INFINITE resistance and no current ...
no resistance in a circuit is where current flows unaffected and results in a dead short...

 

I tested it with the positive lead off is what I meant. This is with the key off and not touching any buttons. The idea is that if there is some type of resistance (other than infinate) between your positive terminal and ground then you effectively have some type of load that is draining your battery. putting your meter in series with the positive lead and the positive terminal and setting to measure current will also give you the same information. I already know that the ONLY thing that is causing the amount of resistance that I have is the rectifier. I dont need to track anything down or pull fuses or any off that crap.

Someone please just unhook you positive terminal from the battery and measure the resistance you have from the positive lead to a ground on the bike and tell me what your resistance is.

I have put my meter in series with the battery and there is a slight draw but it is very very small. I cant remember what it was. I would just like someone to do the same to their seca II so I can have some thing to go by

also there has got to be a way to test the rectifier.

 

There is Sevorg, it requires a multimeter. You need to measure VAC going into the recifier (output from alternator entering the recifier) and calculate the resultant DC output from the rectifier. This is a rough number but figure about 70% of input in general. Measure your DC output and see how close you are to 70%. For the earlier XJ Seca, you should read about 14.2 to 14.8 VDC @ 2000RPM. My Haynes also has a resistance table to check the regulator off-bike but I'm not to sure if it is applicable to your later model.

 

here ya go, everything's opened up for a little clean and shine so your in luck
battery + to battery - (without the battery) 6.6K
this is a xj750j, i would have thought it should be more but a guy's got to believe his meter

 

ok that didn't sound right so i measured current and it starts out about
2mA and within 20 seconds goes down to .02mA, a cap is charging someplace

 

thanks robert and polock this is the info I wanted

 

see mine says .41 mA and holds, is this too much?

 

Have you tried measuring the resistance and power usage with the rectifier removed? Just to make sure the problem doesnt lie elsewhere.

 

check this out , your #'s dont work out with Mr.Ohm's laws