There usually is a high frequency noise from alternaters especially when putting out near full load. A squeaky noise is indicitive of a bad bearing which doesn't go away and will get louder with time. Contact the vender and discuss this and the wiring problem with him. It could also be belt noise. To confirm while the motor is running squirt a little water on the belt. If the noise changes or goes away it is a belt or pulley problem. Low voltage problems are commonly caused by dirty ground connections or one of the "big" wires from the battery, alternater, or starter. Check them all out because if that is the source of the voltage problem changing the alternater doesn't fix it. I don't think you are really refering to the "field" wire. The wire you are really connecting to is the "Voltage sense wire" which goes to the internal voltage regulater. If it really is the field wire then you will not have any output regulation and will cook the battery. I also recently purchesed the Valetine radar detector and although I haven't used it in my "D" yet it is a huge improvement over the older units I have used. David Teitelbaum vin 10757 --- In dmcnews@xxxx, Andrew Smith <aos+yahoo@xxxx> wrote: > All my previous questions have been answered so well, so I have returned > with another! :) > > I was experiencing very low voltage (like 8), particularly while at idle, > so I picked up the 150 amp alternator from John Hervey at specialtauto.com > (and it arrived incredibly fast--thanks John), but after installation, > I've run into a new problem: the field coil is getting no power. >