01 F350 Alternator not charging

[phatboy5015]

We got a 2001 F-350 Diesel work truck. I've replaced both batteries, alternator, and positive battery cable. And the alternator is still not charging. We put a volt meter on the back of the alternator and it was reading between 3 and 5 volts. So basically nothing. I checked all the fuses.

Anybody got any suggestions?

 

[Tbar]

Rats chewed through a wire on my truck. Wire was low on the passengers side fender, behind the battery, and below the starter solenoid.

Pic 1

Pic 2

Was very difficult to find!!! -mad


Tbar

 

[phatboy5015]

Nope, all those wires look good. Thanks though.

Any more suggestions?

 

[Race22]

Did you take the new alternator back in and have it tested. I have changed alternators before had got a hold of some bad ones.

 

[JLDickmon]

get a "bed of nails" and check every wire coming off the alternator to light a test light with the engine running...

if you have power on all wires, it's a junk alternator