MFJ -4402 Instruction Manual

Mobile transceiver protector

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Page 2 MFJ-4402 Mobile Transceiver Protector Instruction Manual DISCLAIMER Information in this manual is designed for user purposes only and is not intended to supersede information contained in customer regulations, technical manuals/documents, positional handbooks, or other official publications. The copy of this manual provided to the customer will not be updated to reflect current data.
Page 3: Table Of Contents
MFJ-4402 Mobile Transceiver Protector Instruction Manual Table of Contents The MFJ-4402 Mobile Transceiver Protector ............ 1 Specifications ....................2 Installation ......................2 Radio is Already Installed ................3 Radio and Power Lines Not Installed Yet ............4 Ignition Sense Line Installation................5 Checkout and Operation................
Page 4: The Mfj-4402 Mobile Transceiver Protector
The MFJ-4402 has a circuit to cut the radio off before the voltage gets down too low for proper operation.
Page 5: Specifications
Install the MFJ-4402 in a convenient out of the way place that is not exposed to outside conditions. The MFJ-4402 is not waterproof or made for exterior use.
Page 6: Radio Is Already Installed
Radio is Already Installed If the radio has already been installed and there is enough slack to connect the MFJ-4402 then the job of installation is simplified. The assumption in this section ® is the original installation does not use Anderson Powerpoles to connect the ®...
Page 7: Radio And Power Lines Not Installed Yet
Powerpole connectors are put together to match the connectors on the MFJ-4402. RED to RED and BLACK to BLACK. Run the power lines from the radio to the location of the MFJ-4402. ® Put Powerpole connectors on the lines from the radio to the MFJ-4402.
Page 8: Ignition Sense Line Installation
Tapping the wrong wire can cause sever problems in the vehicle. Once the Acc. power source has been identified run a wire between the MFJ- 4402 and the fuse box. Use the proper connector at the fuse box side and a standard insulated female quick disconnect connector (supplied) at the MFJ- 4402.
Page 9: Checkout And Operation
It is possible to connect more than 1 radio to the MFJ-4402 as long as the total current does not exceed 30 amps or the maximum fuse size you are currently using.
Page 10: Powerpole Connector Assembly
Connector Assembly First, slide two connector housings together to match the configuration of the corresponding connectors on your MFJ-4402. It’s easier to do this now rather than after the wired terminals have been inserted in the housings. You can install the Powerpole connectors on your wires by either soldering or ®...
Page 11: Additional Materials That May Be Needed
MFJ-4402 Mobile Transceiver Protector Instruction Manual ADDITIONAL MATERIALS THAT MAY BE NEEDED These are materials that may be needed in the installation depending on how the radio is installed and what sort of connections need to be made to the vehicle. In a new install or an existing install the radio’s power cable supplied with the radio...
Page 12: Schematic
Overvoltage surge Have the electrical system in the car checked out to identify and fix the cause. Positive Fuse Short in the line to the MFJ-4402 Find and repair short in blows in the cable line at the battery...
Page 13 MFJ-4402 Mobile Transceiver Protector Instruction Manual Alternator The MFJ-4402 does not fix Have the alternator Whine alternator whine. checked out. A blown diode in the alternator may not inhibit its function but will increase whine. Check battery and alternator connections for corrosion and loose connections.
Page 15: Full 12-Month Warranty
Instruction Manual FULL 12-MONTH WARRANTY MFJ Enterprises, Inc. warrants to the original owner of this product, if manufactured by MFJ Enterprises, Inc. and purchased from an authorized dealer or directly from MFJ Enterprises, Inc. to be free from defects in material and workmanship for a period of 12 months from date of purchase provided the following terms of this warranty are satisfied.