Where is the voltage regulator on a 2004 Ford E-250 van and how can I replace it?

voltage regulator is located internally inside an alternator and is usually not a serviceable part. you would either need to replace entire alternator or take it to a alternator shop to have them replace the voltage regulator

there should be a decal under the hood somewhere that shows the belt routing.

Inside the alternator.

does the van starts after is quits, does it crank or does the engine turnover?

Hi Lee, Just an observation. I believe the voltage regulator is in the alternator and not the ECM. I would suggest you replace the regulator or the brushes in that unit. Regards John

It's an integral part of the alternator...

alternature to be replace

ck your alternator if you have one large white wire and two smaller dark wires you've got an internal regulator the entire alternator needs to be replaced if bad

a simple voltmeter you can still buy at radio shack will tell you in about 30 seconds

set meter for dc volts 25 volt scale place red probe on battery positive and black probe on battery negative note reading on voltmeter (11 to 12 volts) start truck/car at idle reprobe battery same as before volts should come to about 12/13 have someone give a slight throttle to engine volts should come to 13.8 volts and stay there never going over this if any volt reading was not as described Yep your voltage regulator/alternator is bad

You must have an older vehicle,but I am pretty sure the 7.3 was put out after the voltage regulator was put in the alternator.What you are describing is a voltage regulator on the the firewall.If this is so,replace the voltage regulator on the firewall,with a new one.This will be the problem most likely.The voltage regulator on the firewall should be kind of flat,almost square,and a wide plug,goes all the way across the voltage regulator.If You don`t have external regulator,then it is built in the alternator,and the alternator you purchased is bad.Be sure the wires on the back of the alternator are not broken anywhere.The big post ,largest wire,on the back of the alternator is the out put wire.It should go to the battery.If it does not have 13.65 to 14.25 volts on the back of the alternator,and at the battery positive post.Like I said,I believe the voltage regulator is on the firewall,if it looks like I described,then it is a regulator,replace this part(voltage regulator)and it will solve your problem.I hope this was some help,please let us know,thank you.

u will blow alternater and battery if u do this ,replace voltafe regulator and see if u get 14.25 on a volt scale,if not replace alternter,if battery test good (check with load tester),increasing the wire size from alt. to batt. might help also