21178777 Wiring Harness | Genuine Volvo Penta Part

🔧 Product Description

Brand-new genuine Volvo Penta 19-inch alarm-panel jumper harness with a four-pin male connector and two-pin female connector. It links panel 21178775 to the catalyst-engine wiring loom without field splices.

🚤 Compatibility

• Engine Family: V
• HP Range: 225-380 HP

Full model list at the end of this description.

⚙️ Key Features

• Length: approximately 19 inches
• Four-pin male to two-pin female connector arrangement
• Factory alarm-panel pinout
• Marine-sealed connector housings
• Harness only; alarm panel and sounder are separate
• Engine type: Volvo Penta 5.7-litre V8 catalyst marine gasoline engine

🔌 Function

Carries the warning-signal and supply circuits between the engine loom and alarm panel.

⚠️ Common Signs of Failure

• Alarm panel inoperative
• Intermittent warning when the harness is moved
• Broken conductor near a connector
• Corroded pins
• Damaged connector latch

🛠️ Service Notes

• Compare the new harness with the old one before fitting — check the connector types, the number of pins and the branch lengths, and lay it out alongside the old loom to confirm every branch reaches its component
• Disconnect the batteries before unplugging or fitting a harness, and support the loom as you work so its weight never hangs on a connector or a bulkhead grommet
• Route it along the original path and secure it with the original clips and ties, clear of hot exhaust surfaces, sharp edges and anything that moves; leave a service loop at each connector rather than pulling a branch tight
• Push every connector home until the lock latches and protect the joints with a marine dielectric grease — an intermittent electrical fault is far more often a partly seated or salt-corroded pin than a broken wire
• Renewing the harness is the right repair where insulation is chafed, brittle or oil-soaked, or where corrosion has tracked inside the connector bodies; patch repairs in a damp engine bay tend to fail again, and any single conductor that is repaired should be joined with tinned marine cable of the same gauge, a proper crimp and adhesive-lined heat-shrink

🔄 Supersession & Cross Reference

OEM / Related Numbers

• Alarm panel 21178775
• Alarm 21182016

Other-Brand OEM Numbers

• VOE21178777

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta 8.1GiC-J, 8.1GiC-JF, 8.1GiC-Q, 5.7GXiC-320-R, 5.7GXiC-J, 5.7GXiC-JF, 5.7GXiCE-JF, 5.7GXiCE-J, 5.7GXiCE-M, 5.7GXiC-P, 5.7GiCE-300-M, 5.7GiCE-300-MF, 5.7GiC-300-J, 5.7GiCE-300-J, 5.7GiCE-300-JF, 5.7GiC-300-JF, 5.7GiC-300-P, 5.7GiC-300-R, 5.0GiC-225-S, 5.0GiC-J, 5.0GXiCE-JF, 5.0GXiCE-J, 5.0GXiC-JF, 5.0GXiCE-M, 5.0GXiCE-MF, 5.0GXiC-P, 5.0GXiC-270-R, 5.0GXiC-J, 3.0GXiC-J
• Volvo Penta V8-270-C-B, V8-300-C-A, V8-300-C-B, V8-320-C-B, V8-320-C-A, V8-380-C-B, V8-380-C-D, V8-350-C-D, V8-380-C-A, V8-225-C-A, V8-225-C-B, V8-270-C-A