Posted By: 80fbody
Nippondenso Alternator Questiion - 05/23/18 02:31 PM
Are the Nippondenso alternators out of a 90's dodge internally regulated or do we still use the regulator on the firewall like the original alternators? Not sure how to wire the one I purchased awhile back.
mine is a denso 120 amp external regulated on the 440 truck (not sure what it is from/double groove pulley)
I have a denso mini (smaller than my denso120amp) from 88 van/double pulleys that is external regulated. not sure what amp?
IIRC they ditched the VR on firewall in 89-93
if it has a serp pully I think those are internal regulated
swing by an autozone and have them toss it on the machine and test it. that will let you know for sure.
Posted By: savoy64
Re: Nippondenso Alternator Questiion - 05/23/18 03:59 PM
nope---serpentine means the computer runs it...
Posted By: 80fbody
Re: Nippondenso Alternator Questiion - 05/23/18 04:08 PM
Mine came with serpentine and v groove pulley in the box. I'll have to get some numbers off it and see if I bought a dud....
Posted By: volaredon
Re: Nippondenso Alternator Questiion - 05/24/18 02:53 AM
the alt doesn't know or care if it is being controlled by an external VR or a computer. That same alternator was used for about 8 years, and it was regulated both ways. and serpentine pulleys can be swapped out for V pulleys and vise versa easily enough... done so more than once.
on the 91s (seems worst year for VR part of computer brain frying) vans/pickups/Dakotas, I have seen them all with the regulator wires dug out of the harness and a plain old Mopar VR wired in.
Posted By: Andrewh
Re: Nippondenso Alternator Questiion - 05/24/18 03:37 AM
you can wire it up with either the dual field vr from 74 and up or ground one of the field wires and use the single field wire vr.
I have mine wired up to a single field vr and just ran a ground wire to the plug.
the plug was the hardest thing to get. had to go to a yard to find one that wasn't clipped off.