Durango 4WD V8-5.9L VIN Z (1998)
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Radio antenna base ground
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Radio chassis ground wire, strap, or bracket
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Engine-to-body ground strap (if the vehicle is so equipped)
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Cab-to-bed ground strap (if the vehicle is so equipped)
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Heater core ground strap (if the vehicle is so equipped;)
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Resistor-type spark plugs
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Radio suppression-type secondary ignition wiring.
In addition, if the source of RFI or EMI noise is identified as a component on the vehicle (i.e., generator, blower motor, etc.), the ground path for
that component should be checked. If excessive resistance is found in that circuit, repair that circuit as required before considering any component
replacement.
If the source of the noise is identified as two-way mobile radio or telephone equipment, check the equipment installation for the following:
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Power connections should be made directly to the battery, and fused as closely to the battery as possible.
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The antenna should be mounted on the roof or toward the rear of the vehicle. Remember that magnetic antenna mounts on the roof panel can
adversely affect the operation of an overhead console compass, if the vehicle is so equipped.
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The antenna cable should be fully shielded coaxial cable should be as short as is practical, and should be routed away from the
factory-installed vehicle wire harnesses whenever possible.
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The antenna and cable must be carefully matched to ensure a low Standing Wave Ratio (SWR).
Fleet vehicles are available with an extra-cost RFI suppressed Powertrain Control Module (PCM). This unit reduces interference generated by the
PCM on some radio frequencies used in two-way radio communications. However, this unit will not resolve complaints of RFI in the commercial
AM or FM radio frequency ranges.
