Owners manual

Disconnect Battery Negative (-)
READ ALL INSTRUCTIONS IN BOX!
Charge Wires:
100 Amp Alt. use 8 gauge up to 6 ft.
120 Amp Alt. use 6 gauge up to 6ft.
150 Amp Alt. use 6 gauge up to 6ft.
Alternator Ground: Many mounting brackets are
powder/clear coated, painted, or plated. The
alternator will not ground properly without a ground
wire from the Alt. housing to the engine block. (This
wire should match charge wire size)
Battery must have a clean ground to engine block.
Wire Connections: Be sure all terminals are crimped
securely, and connections are clean and tight.
ALT 1
1833 DOWNS DRIVE – WEST CHICAGO, IL 60185 REV 10/17
Belt Tension: Inspect belt for signs of cracking or
glazing. Replace if needed. A loose belt will cause
intermittent charging and generate excessive heat
resulting in premature unit/bearing failure.
For V belt units follow attached pulley tag.
A fully charged battery is at least 12.6V, not 12.0V. A
weak/defective battery will cause premature failure.
Never disconnect the battery with engine running! This
causes voltage spikes that will damage the alternator.
DO NOT EXCEED 18,000 ALTERNATOR SHAFT RPM
(See Catalog pg.45 for more info)
FAILURE TO FOLLOW THESE INSTRUCTIONS MAY
VOID YOUR WARRANTY
(Warranty void if unit is soaked in Oil or Mud)
WIRING INSTRUCTIONS
GM SI Alternator (One Wire or OE Hookup)
Tech Dept.
[phone]
[e-mail]
Replaces these OEM Alternators
GM 10DN
Externally
Regulated
GM 10SI
Internally
Regulated
Optional Charge Indicator Light Function: Your Powermaster Alternator
is designed to work as a 1 wire without any connections to the plug in. The
function of the plug is to run a charge indicator (Idiot Light) only. This plug also
does not serve as a hookup point for a voltmeter, or help charging at idle.
This connection has no effect on charging performance.
Wiring Instructions for Internal & External Regulator to 10SI/12SI/17SI 1 Wire Upgrade
Charge Post Size
12-24 for 100/120 Amp
5/16-18 for 150 Amp
Ground Strap
5/16-18 (Smooth Look)
M8 x 1.25 (Original Look)
M10 x 1.5 (17si)
OR
BATTERY +
BATTERY + ON
STARTER SOLENOID
NOTE: If you would like to
retain the charge indicator
light when converting from
External regulator. See part
number #150 for a plug and
play DN to SI series adapter.
Charge Ind. Light
From Ignition Switch
GM 12SI Style Plug
(Ind. Light) (D)
1 2
Removable Cap