Product Description
Need a 1-Wire Alternator for your 1989-2002 Dodge Ram pickup with the 5.9 Diesel Cummins? This unit has a maximum output of 160+Amps and will produce between 80A to 90A at idle depending on whether the engine is gas or diesel and shaft speeds. This unit will increase the charging capacity at all RPM Ranges with NO modifications. If you are putting the 5.9 Diesel powerplant into a vehicle not wired or equipped for it, this is your answer - no external regulator, no wiring. Just the main power feed wire. This unit has our lifetime warranty
Applications: 1989-2002 Dodge Ram with a 5.9L Cummins and anything with a 5.9 Cummins transplant
Customer Installation Video HERE 2025
Customer Installation Video HERE
We offer an optional W-Terminal or TACH pickup wire to this alternator. This option is only available on these “SE” Denso / dodge alternators that eliminate the PCM. When you select this option, we will provide a tach lead for connection to a diesel specific aftermarket tach. This is only available at the time of assembly and older units are not physically eligible for retrofit. The connection is simple, the wire is provided by us but does not need to be used if no tach is intended. This will not work with factory equipped tachometers or ignition-based tachometers, only a stator signal tachometer. The rotor has 12 poles, some calibration instructions ask this (tach shown is not included)
Tach image shown for illustration only, we do not sell tach or any gauges.
Some brands our customers have said work well:
Dakota Digital
Speedhut ; special order
ISSPRO R8586M
GlowShift
WARNING: California PROP65 Cancer and Reproductive Harm Notice www.P65Warnings.ca.gov
Product Videos
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Product Reviews
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joelwoolman1@gmail.com
This alternator is a apsolut must for any cummins swap project work great steady 14 volts running two 1100cca commercial batteries well down pa performance
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Bulletproof Charging
Forget about tracking down bad temp sensors or bypassing the PCM with hit-or-miss external regulators. With it's super simple installation and rock solid 14.7 charging volts, this alternator will make your 12 valve Cummins one step closer to "Wasteland Ready"!
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Best Upgrade!
Best upgrade for my 1992 1st gen cummins. very easy install and very much needed.
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works great
Best investment ever after going through 4 external regulators in 6 months on my 91 Cummins this alternator fix the problem
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Amazing upgrade!
Fantastic upgrade for my 1992 1st gen cummins. will recommend for anyone that wants to upgrade their alternator.
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Best Cummins Alternator
Best and easiest fix for 1st Gen Cummins charging issues. One wire and your charging. No voltage regulator, wiring or ecm problems to chase. Just hook up n go. Charges 14.7 volts at idle and 14.7 volts wide open. Dont buy another voltage regulator, buy this alternator!
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simple fix
Easy fix to the voltage issues in my dodge .
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saved my pickups life
Been fighting burning up regulators and many other issues for 3 years on 91 w250. Was just fixing to sell the pickup when heard about this alternator an figured I'd give it a try. Not only does it charge great, it isn't boiling my battery, all my lights started working, speedometer works again and so do power steering and brakes. I know no relation there but im so happy I'll just go ahead and give credit to this fine alternator. Thanks a million.
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one wire alternator
I have a 12 valve swapped 2004 Dodge Ram 3500. The previous owner had a low power GM one wire in it that finally stopped working. I received this alternator and bolted it right up and it works flawlessly! I'd recommend this to anyone that has a cummins swap.
