ford 555d not charging

[mazdmec1]

got a 555d backhoe that the alternator was starting to seize and broke the belt. Got a reman alternator from case/new holland and belt. Put them on, charged up the battery and checked charging, it wasnt charging. Noticed the warning light wasnt on either. I grounded the wire for the lamp circuit at the alternator and the lamp comes on. I am thinking that I have a bad alternator but wanted to make sure there wasnt something simple i was overlooking. B+ and warning circuit both have battery voltage when running and key on engine off.

 

[Andy Wickiser]

got a 555d backhoe that the alternator was starting to seize and broke the belt. Got a reman alternator from case/new holland and belt. Put them on, charged up the battery and checked charging, it wasnt charging. Noticed the warning light wasnt on either. I grounded the wire for the lamp circuit at the alternator and the lamp comes on. I am thinking that I have a bad alternator but wanted to make sure there wasnt something simple i was overlooking. B+ and warning circuit both have battery voltage when running and key on engine off.

If charge light doesn't come on with key switch in run position and engine not running (we know the bulb is good) the service manual sends you to Alternator Output Lead Test shown below. If you don't have a service manual and need additional info let me know.

 

[mazdmec1]

OK I did the tests listed just not in that order. Looks like the reman alternator is bad. Thanks

 

[mazdmec1]

got another reman alternator on still not charging. Does anyone have the rest of the troubleshooting from the manual, so far I pass the steps on the first page that Andy posted.

 

[mazdmec1]

does anyone know what this wire is, where it goes and what if any voltage that should be on it?

 

[Andy Wickiser]

That's

does anyone know what this wire is, where it goes and what if any voltage that should be on it?

 

[Andy Wickiser]

does anyone know what this wire is, where it goes and what if any voltage that should be on it?

That's charge indicator lead if I'm not mistaken, see below

 

[Andy Wickiser]

That's charge indicator lead if I'm not mistaken, see belowView attachment 5923

Also main output repeated there on spade terminals, didn't see additional diagram until later.

 

[mazdmec1]

Figured this all out. Battery sensor was unplugged. Had to replace the connector because i couldnt get it plugged back in. It is now charging but the battery light still does not come on. Going to let the customer run it for a while.

 

[Andy Wickiser]

Figured this all out. Battery sensor was unplugged. Had to replace the connector because i couldnt get it plugged back in. It is now charging but the battery light still does not come on. Going to let the customer run it for a while.

That's what I was going to suggest next. Was in the process of posting partial wiring diagram. Fusible link not blow because battery voltage appears at alternator and indicator lamp circuit checked O.K. per test.

 

[DanielW]

got a 555d backhoe that the alternator was starting to seize and broke the belt. Got a reman alternator from case/new holland and belt. Put them on, charged up the battery and checked charging, it wasnt charging. Noticed the warning light wasnt on either. I grounded the wire for the lamp circuit at the alternator and the lamp comes on. I am thinking that I have a bad alternator but wanted to make sure there wasnt something simple i was overlooking. B+ and warning circuit both have battery voltage when running and key on engine off.

Probably not the response you want to hear, but on my 555 when it stopped charging, I just said 'to heck' with the Ford alternator and Motorolla regulator. I just put a standard, internally-regulated, three-wire 10SI on there, ran the three new wires, and permanently bypassed all that old wiring and stock regulator. Very easy and foolproof: You can pick up a new or rebuilt 10SI for less than $200 and it will save you all sorts of headaches diagnosing other electrical/regulator gremlins. I didn't even bother with the indicator light: Chances of a 10SI failing in my life are so slim that I'm not fussed about it. Even if it does fail, it's as simple as doing a standard rebuild on a 10SI - the wiring for them is so simple that there's nothing else to fail.

 

[mazdmec1]

if it were mine, i would have put a one wire alternator on it, but customer didnt want to go for that