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
Custom Field
Product Reviews
57 Reviews Hide Reviews Show Reviews
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Installation
Installed flawlessly have yet to wire and see how it performs but impressed as of now!
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Great company best customer service
Best alternator for a Dodge with a Cummins when the PCM no longer tells the alternator to charge bought one of these solve the problem if one goes bad all you do is call they take care of it hard to find a company like that anymore nice to know that they stand behind their product if I ever need an alternator for any of my other stuff definitely will be calling them
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Nice product
Installed this alternator on my 1992 W250. Very simple install, charges much better than the factory alternator-at a solid 14.7 volts. Puts out enough power that I can barely tell my grid heaters are running. Headlights seem brighter as well. I feel confident that my charging system is now as reliable as the cummins engine.
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Cummins 1 wire alternator
Best way to go if you have had trouble with your external voltage regulator in the past. Simple as can be to install with holes exactly where factory alternator goes and correct pulley. Little pricey but think of the long run. Charges great. Great product
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136A DENSO STYLE ALTERNATOR 5.9 CUMMINS 1-WIRE (2227SE)
I installed the product about 2 weekes ago and I've been extremely happy so far, no more charging problems, no more woorying about voltage regulators going at the most inconvient times. This altenator is great i recommend it to anyone with a 1st gen
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Best Alternator for old Trucks
Works perfectly as described. If you need a good alternator for a truck that has charging wiring system problems or simply want one that is simple and reliable, then this is the one for the job!
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136A 5.9 alternator
Best money ever spent had a lot of problems with other this one is worth every penny , couldn’t ask for a better product
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Alternator
Works great. Definitely worth the money
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One wire alternator
I installed this one wire alternator on my 1st gen Cummins and it solved my charging issues.
