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Black wiring harness with multiple coloured wires, 8-pin connector and two pairs of RCA plugs

METRA

METRA 70-5518 Ford Ranger Tremor 02-03 Factory Amp Integration Harness car electronics accessory

SKU CH-6AKX-4W131

Allows aftermarket radio installation using existing factory wiring and connectors without cutting

  • Product typeCar Stereo Add-Ons
  • Integrates aftermarket radio using factory wiring and connectors
  • No cutting of factory wiring required for installation
  • Includes 8-pin harness with two pairs of RCA plugs
  • Supports factory amplifier integration for Ford Ranger Tremor
  • Simplifies stereo upgrade with plug-and-play connection

Ford Ranger Tremor Amp Integration Harness

The METRA 70-5518 connects an aftermarket radio to the factory amplifier in Ford Ranger Tremor vehicles. It uses the existing factory wiring and connectors so no cutting of the original harness is required. The kit includes an 8-pin harness with two pairs of RCA plugs and the PN 70-1771 adapter. Installation follows the supplied product guide INST70-5518.pdf.

Installers Keeping Factory Amplifier

This harness suits installers who want to retain the vehicle's original amplifier when fitting a new head unit. It is not for buyers who plan to bypass the factory amp entirely or who need an interface for a non-Tremor Ranger model. Vehicles outside the specified application will require a different wiring solution.

8-Pin Harness With Dual RCA Outputs

The single specification that decides fitment is the 8-pin connector paired with two sets of RCA plugs matching the factory amplifier input. Confirm the vehicle side uses this exact pin count and signal arrangement before ordering.

How it compares

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Price $8.99
Cheaper than about 92% of the 2,768 comparable items (median $21.99).

Specifications

Product
Product typeCar Stereo Add-Ons

Questions about this item

Which Metra harness part number matches the 70-5518 kit for my Ford Ranger Tremor factory amp?

The kit includes the 70-1771 8-pin harness with two pairs of RCA plugs, which is the specific component that connects to the factory amplifier wiring.

What does the 8-pin connector with two RCA pairs actually do once installed?

It feeds the factory amp a clean line-level signal from the aftermarket radio through the RCA cables while the 8-pin plug carries power, ground and speaker-level connections.

How does the factory plug interface limit what I can connect?

The harness uses the vehicle's original 8-pin factory connector, so it only works with radios that provide front and rear pre-amp outputs via RCA; it cannot add channels the factory plug does not carry.

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