SureThing!
New member
I just found this site and have searched for all the info I could find but could not find out exactly how the charging system works.
I have a 2006 BF225 that the battery light illuminated and gives off the consistent long beep audible alarm once it is started. I verified the altenator is not charging by turning off the battery switch while the motor is running. The motor stops immediately. I measured battery power at battery and it was 12.7vdc. I measured the output / battery terminal on alternator and case and I have 12.7 vdc. I also tried to measure voltage drop between battery positive terminal and output wire on alternator as well as between negative post on battery and case of motor. Both were 0 vdc. This confirms my wiring between battery and alternator are solid/ good connections.
I then pulled the 4 pin plug to alternator with the motor off I measured each wire in the plug to ground and then started motor and did it again.
Measured 4 input wires to alternator.
Ignition off:
White/ black stripe —12.7vdc
White/ blue stripe— 0vdc
White/ green stripe— 0 vdc
Yellow/ black stripe— 0 vdc
Ignition on:
White/ black stripe —12.2vdc
White/ blue stripe— 12.2vdc
White/ green stripe— 5 vdc
Yellow/ black stripe— 12.2 vdc
I then thought it was a bad alternator, so I pulled the alternator and took it to a electrical shop that rebuilds motors and had them bench test it.
I was told the alternator put out full current and was good. They told me the alternator has an external voltage rectifier.
I found this article on Honda’s dual output charging system used on honda cars.
The way I understand it there is an ELD electrical load detector that appears to be a shunt in the circuit. Located in the fuse box on cars that regulates the output voltage on the alternator.
Basically when there is a large load on the charging system it pulls the 5 vdc signal down to 1-2vdc and the alternator puts out full output of 14.7vdc at 80 amps.
Does anybody know where this ELD is on the BF225?
Or
If this is not the way the BF225 charging system works, how does the sensing circuit work so I can troubleshoot that portion of my charging system. Any help would be greatly appreciated. I’m on the beach until I get this resolved. I would take it a shop and put it on a laptop if that was an option, but the soonest someone can look at it is mid September and the Salmon season is over where I live in western washington.
I have a 2006 BF225 that the battery light illuminated and gives off the consistent long beep audible alarm once it is started. I verified the altenator is not charging by turning off the battery switch while the motor is running. The motor stops immediately. I measured battery power at battery and it was 12.7vdc. I measured the output / battery terminal on alternator and case and I have 12.7 vdc. I also tried to measure voltage drop between battery positive terminal and output wire on alternator as well as between negative post on battery and case of motor. Both were 0 vdc. This confirms my wiring between battery and alternator are solid/ good connections.
I then pulled the 4 pin plug to alternator with the motor off I measured each wire in the plug to ground and then started motor and did it again.
Measured 4 input wires to alternator.
Ignition off:
White/ black stripe —12.7vdc
White/ blue stripe— 0vdc
White/ green stripe— 0 vdc
Yellow/ black stripe— 0 vdc
Ignition on:
White/ black stripe —12.2vdc
White/ blue stripe— 12.2vdc
White/ green stripe— 5 vdc
Yellow/ black stripe— 12.2 vdc
I then thought it was a bad alternator, so I pulled the alternator and took it to a electrical shop that rebuilds motors and had them bench test it.
I was told the alternator put out full current and was good. They told me the alternator has an external voltage rectifier.
I found this article on Honda’s dual output charging system used on honda cars.
The way I understand it there is an ELD electrical load detector that appears to be a shunt in the circuit. Located in the fuse box on cars that regulates the output voltage on the alternator.
Basically when there is a large load on the charging system it pulls the 5 vdc signal down to 1-2vdc and the alternator puts out full output of 14.7vdc at 80 amps.
Does anybody know where this ELD is on the BF225?
Or
If this is not the way the BF225 charging system works, how does the sensing circuit work so I can troubleshoot that portion of my charging system. Any help would be greatly appreciated. I’m on the beach until I get this resolved. I would take it a shop and put it on a laptop if that was an option, but the soonest someone can look at it is mid September and the Salmon season is over where I live in western washington.