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BATTERY ISOLATOR
Model 93801: 70 Amp
Model 93802: 90 Amp
Due to continuing improvements, actual product may differ slightly from the product described herein.
®
3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit our Web site at: http://www.harborfreight.com
TO PREVENT SERIOUS INJURY,
READ AND UNDERSTAND ALL WARNINGS
AND INSTRUCTIONS BEFORE USE.
© ®
Copyright 2006 by Harbor Freight Tools . All rights reserved. No portion of this
instruction sheet or any artwork contained herein may be reproduce
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SAFETY WARNINGS AND PRECAUTIONS 1. WARNING! Avoid risk of fire. Prior to installation remove the cables from the negative terminals of all the batteries on your vehicle. 2. Inhalation Hazard! Do not operate an engine in a closed area or in a poorly ventilated area. When running, an engine produces carbon monoxide, a colorless, odorless, toxic fume that, when inhaled, can cause serious personal injury or death. 3. Prior to installation, make sure to read and understand all instructions and sa
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PRODUCT SPECIFICATIONS Item Description Electrical Model 93801: 70 Alternator Amps Maximum / 6, 12, 24, 32, 48 DC Volts Capable Requirements Model 93802: 90 Alternator Amps Maximum / 6, 12, 24, 32, 48 DC Volts Capable Construction Aluminum Extrusion / Grade 2 Steel Hardware & Fasteners Dimensions Model 93801: 4-1/2” Wide x 4” Deep At Base x 2-1/2” High (3-1/4” High At Terminals) Model 93802: 4-1/2” Wide x 4-15/16” At Base x 2-1/2” High (3-1/4” High At Terminals) Specifics Same Nomina
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GENERAL INSTALLATION INSTRUCTIONS PRODUCT USAGE: The Battery Isolator allows maintenance-free and deep cycle batteries to be properly charged and also offers dual battery control. 1. IMPORTANT: If you are installing the Isolator on a Toyota (Alternator Group 2) or a Motorola/Bosch (Aternator Group 3) refer to the special instructions in this manual before disconnecting any part of the existing system. 2. For optimum system performance, use a battery labeled “Deep Cycle” in the auxiliary positi
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8. Locate the “BAT” terminal at the rear of the alternator. Disconnect ALL the wires (including the voltage regulator sensing wire if present) from the BAT terminal of the alternator. Reconnect these same wires to the #1 terminal of the Isolator. Lengthen the wires if necessary. NOTE: Disconnecting or cutting these wires in a location other than at the alternator may result in improper functioning of the charging system. (See Figure B.) Battery Isolator Alternator A “BAT” 12 Disconnect wire
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10.Mount a circuit breaker (not included) as near to the auxiliary battery as possible, but away from engine or exhaust heat (See “Recommended Wire Size/Circuit Breaker” Chart for proper size). Connect one end of a new wire of the proper size to the “2” terminal of the Isolator. Run the wire to the circuit breaker and connect it to the “AUX” terminal or its equivalent. Run another wire from the circuit breaker to the auxiliary battery, connecting one end to the “BAT” terminal of the circuit b
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SPECIAL INSTRUCTIONS FOR FORD INSTALLATIONS (1985 AND LATER) 1. NOTE: This section applies to Ford alternators with 2 plug-in connections. If your alternator has an output bolt, return to Step #10 of the “General Installa- tion Instructions” (page 6). 2. CAUTION! Disconnect the battery before proceeding with modification and installa- tion. 3. Locate the connector on the side of the alternator that has one light wire and two heavy black wires with orange or red trace. (See Figure F.) 4. Cut
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ELECTRICAL TEST PROCEDURES 1. NOTE: Connect the negative test lead to the negative (–) terminal on the battery. Testing With The Engine Not Running: The #1 terminal of the Isolator should read vehicle battery voltage. The #2 terminal should read auxiliary battery voltage. The “A” terminal may read from zero to 13 volts. Testing With The Engine Running And Alternator Charging: The #1 and #2 should read regulator setting or less, typically from 13.8 to 14.5 volts. The “A” terminal voltage shoul
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PARTS LIST AND ASSEMBLY DIAGRAM Part # Description Qty. 1 Battery Isolator 1 2 Hex Nut (5/16” x 1-1/4” STD Thread) 3 3 Hex/Speed Nut (5/16” x 1-1/4” STD Thread) 3 4 Hex Head Sheet Metal Screw (#10) 4 5 Split-Lock Washer (1/4” I.D.) 4 6 Split-Lock Washer (5/16” I.D.) 3 2 Not 6 Included 3 1 4, 5 NOTE: Some parts are listed and shown for illustration purposes only, and are not available individually as replacement parts. PLEASE READ THE FOLLOWING CAREFULLY THE MANUFACTURER AND/OR DISTRIBUT
