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Alternator Wiring Harnesses

Use these convenient harnesses to adapt one style alternator in place of another.

Contact us if you have any question about which part you may need.

Scroll to the bottom of the page to order

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     Delco SI to CS - Part # W1201

Used to connect an early style Delco 10SI or 12SI internally regulated

wiring harness to the later style Delco CS series alternator.

Will work on CS130 or CS144 alternators.

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     Delco SI to AD - Part # W1203

Used to connect an early style Delco 10SI or 12SI internally regulated 

wiring harness to the later style Delco AD series alternator.

Will work on AD and CS130D series alternators.

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     Delco 10SI New Installation - Part # W290

This harness can be used as a new installation wiring kit for early 

Delco 10SI and 12SI alternators.One wire will connect to the output

post on the rear of the alternator and the other will be connected 

through a dash light or to a switched ignition source

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     Delco CS New Installation - Part # W1220

This harness can be used as a  new installation wiring kit for

Delco CS-130 or CS-144 alternators. CS130D alternators will

use the harness below. One wire will connect to the output post

on the rear of the alternator and the other will be connected 

through a dash light or to a switched ignition source. 

(Note: New harness now has only the yellow Ignition wire into

plug and does not have a seal on the wires.)

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      Delco AD New Installation - Part # W1223

Use this harness to install a new Delco AD series or CS130D 

series alternator in a vehicle. One wire will hook to the output 

post of the alternator and the other will be connected to a 

switched ingnition source. 

( note: does not have a seal at the rear on the wires)

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     Delco 10DN to 10SI - Part # W315

Easily adapt from an early Delco 10DN externally regulated 

harness to a Delco 10SI or 12SI internally regulated alternator.

Has a bypass jumper wire to keep dash light functioning. 

Instructions included.

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     Delco DN to CS - Part # W315CS

Use this harness to go from the early Delco 10DN externally 

regulated factory loom to a Delco CS130 or CS144 alternator.

Existing lights and gauges will still function. 

Instructions included.

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     Delco DN to AD - W315AD

This harness will adapt a new AD or CS130D alternator to 

a vehicle's early DN externally regulated GM wiring harness.

All dash lights & gauges will function. 

Instructions included.

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     Delco AD to CS - Part # W1206

This harness will adapt from a Delco AD244 or CS130D 

series factory wiring harness to a Delco CS130 or CS144 

style alternator. All dash lights & gauges will function.

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     Delco CS to AD - Part # W3030D

This harness will adapt from a Delco CS130 or CS 144 

series factory wiring harness to a Delco AD244 or CS130D 

style alternator. All dash lights & gauges will function.

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     Ford 6G to 3G - Part # W2740

Use this harness when installing a Ford 3G series 

(small or large case) alternator in a vehicle with a 6G 

factory wiring harness. All lights & gauges will function 

normally. NOTE: This harness will work with 6G systems 

that have a gray colored regulator. Alternators with a white 

colored regulator are PCM controlled and this harness will 

not allow feedback to the PCM. 

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     Ford 3G New installation - Part # W2730

Used to install a new 3G alternator in Ford vehicles. Will 

allow alternator to turn on by connecting through a dash 

light or switched ignition source. Easily ties into existing 

wiring for early externally regulated alternator systems. 

Instructions included.

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     Ford 2G to 3G adapter - Part # W2700

You can replace your 2G Ford alternator with a Ford 3G 

alternator by using this harness. The D shaped plug will be 

the same as the factory harness and the instructions will show 

you how to hookup the wires from the rectangular plug correctly.

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     Chrysler Alternator to Regulator - Part # W210

This harness will connect a dual field voltage regulator to 

a dual field alternator. You can also use it to change a single 

field alternator to a dual field alternator or change from the 

early style regulator to a transistorized regulator.

Instructions included.

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Quality Power
W1203
W1201 -- Delco 10SI / 12SI to Delco CS-130 / CS-144 $23.00
W1203 -- Delco 10SI/12SI to Delco AD series $23.00
W290 --- Delco 10SI / 12SI for new installation $22.00
W1220 -- Delco CS series new installation $25.00
W1223 -- Delco AD series new installation $25.00
W315 --- GM External Reg. to Delco 10SI/12SI series $25.00
W315CS -- GM External Reg. to Delco CS series $25.00
W315AD -- GM External Reg. to Delco CS130D / AD series $25.00
W1206 -- Delco AD244 to Delco CS-130 / CS-144 $25.00
W3030D -- Delco CS to AD $35.00
W2740 -- Ford 6G to 3G adapter harness $33.00
W2730 -- Ford 3G for new installation with light or gauge $25.00
W2700 -- Ford 2G to 3G adapter harness $22.00
W210 --- Chrysler wiring harness-alternator to regulator -- dual field $33.00