Mercury – Trim All Adapter Harness | Dual Console / Retrofit Interface | 84-8M0094269

Overview
This adapter harness is made for situations where a dual-console ERC still has a “trim all” handle switch, but the boat is being repowered or updated with older DTS helm harnessing that doesn’t match up. It bridges the gap so the trim-all function works the way it should without rewiring the whole helm. It can also be used on SF2 dual ZE LCM setups between the pad and the handle. It’s a small, practical fix for boats where the controls and the harnessing come from different generations.

Key Features
    • Trim-All Adapter – Lets the “trim all” handle switch talk to older DTS helm harnessing.
    • Dual-Console ERC Use – Meant for dual-station electronic remote controls.
    • Retrofit Solution – Ideal when mixing new ERC hardware with earlier DTS harness layouts.
    • SF2 Dual ZE LCM Compatible – Can run between the pad and handle in those setups.
    • OEM Build – Factory connectors that snap in securely without splicing.

Engine & Boat Compatibility
    • Digital Throttle and Shift
    • Dual-console ERC
    • SF2 dual ZE LCM
    • Retrofit DTS harnessing

Performance & Practical Benefits
This harness keeps the trim-all switch behaving normally even when the controls and harnessing don’t come from the same generation. It saves you from chasing down mismatched wires or losing the trim-all feature altogether. The connection stays clean and predictable, which makes the boat easier to trim when running in chop or balancing the hull on plane.

Why Buy OEM
OEM adapters match Mercury’s wiring logic, which means the trim-all signal lands exactly where the system expects it. No guesswork, no loose fits, and no risk of odd trim behavior. It’s a solid fix for mixed-year DTS rigs.

FAQ
Q1: When do I actually need this harness?
A: When you’re repowering or updating a dual-console ERC boat and the existing DTS helm harness doesn’t match the “trim all” handle switch.

Q2: Can it be used outside a retrofit?
A: It’s not recommended—this harness is meant for mismatch situations only.

Q3: Does it need calibration?
A: No—plug it in and the system reads the trim-all signal normally.

Q4: How does it hold up in saltwater?
A: Very well. Just rinse now and then and keep the connectors clean.

Q5: What are signs something’s off?
A: Trim-all not responding, uneven trim between engines, or intermittent operation at the handle.