B18C1 Swap - Wiring on the Civic Harness

Wiring on the Civic Harness

While removing the engine can take the better part of a day, it is the wiring that takes the most time. This involves swapping the entire Civic harness with the one on the B18. On the Civic harness, many of the plugs already fit directly on to the B18. However, some of them are either too short or require you to splice one that fits (ie IACV, CKF). Below is a list of sensor locations and required plugs for splicing. Be sure to use heat shrink wrapping, solder all connections, then wrap them up with wire looming for a clean install.

KS (green) on the left and IAB on the right

Extending wires on one of the oxygen sensors. When it's all done, it should be covered with looming and taped.

3-Wire IACV plug. Cut this off and then solder on the 2-wire plug from the GSR harness.

CKF plug on the GSR. Cut this off (leaving enough wire for splicing of course) and then solder it to the Civic Harness.

For the Civic, the CKF plug is 3 wires. When you splice on the GSR plug, you can disregard the third one.

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VSS on the left and Radiator plug on the right.

GSR harness after completion.

Carefully disconnecting each GSR plug and replacing it with the corresponding Civic plug. This picture shows both harnesses on the B18. One by one I painstakingly swapped each plug. Although it was tedious, there was no mistaking which plug was supposed to go where.

When hoisting out the engine, I accidentally forgot to unplug the power steering plug. Luckily only the wires came out and nothing ripped. So when putting it back in I used the Helms to see which wire went into which slot, another good reason to get a Helms.

MORE SENSORS
IAT
MAP
EVAP
TPS
VTEC SOLENOID
VTEC PRESSURE
OIL PRESSURE

[Back to Civic] [Engine Removal] [Engine Bay] [Wiring] [Prep Work] [Installation]

	KS (green) on the left and IAB on the right
	Extending wires on one of the oxygen sensors. When it's all done, it should be covered with looming and taped.
	3-Wire IACV plug. Cut this off and then solder on the 2-wire plug from the GSR harness.
	CKF plug on the GSR. Cut this off (leaving enough wire for splicing of course) and then solder it to the Civic Harness.
	For the Civic, the CKF plug is 3 wires. When you splice on the GSR plug, you can disregard the third one.
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	VSS on the left and Radiator plug on the right.
	GSR harness after completion.
	Carefully disconnecting each GSR plug and replacing it with the corresponding Civic plug. This picture shows both harnesses on the B18. One by one I painstakingly swapped each plug. Although it was tedious, there was no mistaking which plug was supposed to go where.
	When hoisting out the engine, I accidentally forgot to unplug the power steering plug. Luckily only the wires came out and nothing ripped. So when putting it back in I used the Helms to see which wire went into which slot, another good reason to get a Helms.