suzuki df70 rectifier/regulator test

[nordicstallion]

The motor manual says I should get a reading of 20-50 on a suzuki resistance meter or readings may differ. I get 0 on all combinations on the three pin plug using my digital resistance meter.Charge coil tests good. My brother thinks I should get high resistance from fried diodes,I think 0 means rec/reg is toast & its chargeing at 15 volts constantly even with full batteries with no regulation. Any thoughts appreciated. Vern

 

[Silvertip]

Re: suzuki df70 rectifier/regulator test

If you are using a digital readout meter and the meter reads 000 without being connected, and still reads 000 when you perform a test, then it says that circuit is OPEN. It is also important to use the correct "Range" on the meter for the value you are expecting. If you get a reading other than zero, then that is resistance it is measuring. Are you using a good quality voltmeter to measure chaging voltage or are you going by a dash mounted voltmeter. 15 volts is not too high and indicates the charging system is working. Are you charging more than one battery?? And how do you know there is no regulation. Not knowing how you are performing the test makes it difficult to interpret whether or not your tests are valid.

 

[nordicstallion]

Re: suzuki df70 rectifier/regulator test

Using a borrowed voltmeter that was in the range of 300 bucks.The Console volt meter does not have numerical graduations so a very close guess is all I can expect.The digital volt meter reads 14.8 on the contacts on the back of the console meter so its in the park.My concern stems from a reading that I remember to be lower,say about 13 in the past. I had a bout of brain flatulence that caused me to turn the 3 way switch off with the motor running. since then I noticed higher readings that never change when the motor is running. I never leave the house without fully charged batteries.14.8 seems excessive & never changes regardless of speed or battery switch position .Ive read that turning the switch off can fry the reg if the motor is running.Im generally running on 1 batt.Reading is always 15 on the console on 1,2,& both. Perhaps I worry too much but the alternative is expensive.The initial reading on the dvm reads 0.L. The reading on the charging coil is with .3 & matches the manual.My understanding was that 0.L was infinite. There is no range setting. Vern

 

[Inducted]

Re: suzuki df70 rectifier/regulator test

Suzuki specs. for the regulated voltage output. 14.5-15.5. Your number of 14.8 is right on target. Your engines battery charge coils are producing the electricity. Most likely at 4500 rpm they are producing too much but a properly functioning rect. reg. will send the excess to ground. If your output is 14.8 at 4500 rpm on the water then you should be ok. I have seen a bad one spike at 16.9v. If it is not regulating properly the voltage will keep increasing with rpm out of the 15.5 spec.

 

[nordicstallion]

Re: suzuki df70 rectifier/regulator test

Thank you for your replies sir.Ill hold off on my repair plans.

 

[anthonynoahan]

Re: suzuki df70 rectifier/regulator test

I had recently bought the Vehicle.The mileage and all other features of this was really very nice. The best part is that the regulatory test for this was performed by a mechanic who is one of my best friends. Could you please produce some more attachments regarding its additional features and latest updates?


circuit breaker tester
micro ohm meter

 

[Rancherlee]

Re: suzuki df70 rectifier/regulator test

Suzuki specs. for the regulated voltage output. 14.5-15.5. Your number of 14.8 is right on target. Your engines battery charge coils are producing the electricity. Most likely at 4500 rpm they are producing too much but a properly functioning rect. reg. will send the excess to ground. If your output is 14.8 at 4500 rpm on the water then you should be ok. I have seen a bad one spike at 16.9v. If it is not regulating properly the voltage will keep increasing with rpm out of the 15.5 spec.

Wow, that's a high range. I know my 70 Johnson (suzuki DF70 in white) also charges at 14.8-15.1v which gave me some concerns as I find that high coming from the automotive repair world. Anything past 14.5v I personally find high and it can start shortening battery life, if a car came to the shop charging at 15v I'd be replacing the regulator/alternator to get it to the 13.8v-14.4v range