sohc to dohc

[bigk]

my friend is almost finish swapping in a dohc ka in to his 89 240sx. the motor is in and we already have everything except th gauge cluster.he just needs to know what wireing do we have to splice under the dash.he will be using a dohc cluster from a 91 .yes ive searched but i havent found which wires "colors"i have to splice.

[justmerging]

If he is going to use the entire cluster he may have to replace the whole harness. There is a plug that comes off the ecu and goes into the dash. You need to cut the DOHC connector off and splice in the SOHC plug so that it will plug back together. I believe you just need to match the wire colors but I'm not 100% sure(I'm colorblind so aome of them look the same to me). If you have both FSM it is easy. They have the pinout diagrams for everything. Then all you need to do is swap the tach in the original cluster to the DOHC tach. It's only like 3 screws.

[bigk]

the

If he is going to use the entire cluster he may have to replace the whole harness. There is a plug that comes off the ecu and goes into the dash. You need to cut the DOHC connector off and splice in the SOHC plug so that it will plug back together. I believe you just need to match the wire colors but I'm not 100% sure(I'm colorblind so aome of them look the same to me). If you have both FSM it is easy. They have the pinout diagrams for everything. Then all you need to do is swap the tach in the original cluster to the DOHC tach. It's only like 3 screws.

is the connector that your talking about go to the tach?

[frapjap]

The tach is just 3 screws in the back of it that make it work. There are holes arranged in a diamond, use the two to the side, and the one at the bottom.

The harness, you don't necessarily have to change, but you do have to splice and match from the harness (its white and you have to push in on the glove box from the sides and pull down to expose it) to the ecu. 5 (or 6 for a/c) wires to splice. They are:

Yellow/Red --TachYellow/Green--SpeedometorOrange--Ignition startBlack---GroundBlue/Black---Water temp sensor

And (for my car '90) green/ orange stripe for a.c.

Hope it works out. Nothing to difficult. The rest of the wires don't need to be hooked up. I've got a write up for the swap, should you come across something unexpected: http://www.nicoclub.com/zerothread?id=78205

[bigk]

thansk

The tach is just 3 screws in the back of it that make it work. There are holes arranged in a diamond, use the two to the side, and the one at the bottom.

The harness, you don't necessarily have to change, but you do have to splice and match from the harness (its white and you have to push in on the glove box from the sides and pull down to expose it) to the ecu. 5 (or 6 for a/c) wires to splice. They are:

Yellow/Red --TachYellow/Green--SpeedometorOrange--Ignition startBlack---GroundBlue/Black---Water temp sensor

And (for my car '90) green/ orange stripe for a.c.

Hope it works out. Nothing to difficult. The rest of the wires don't need to be hooked up. I've got a write up for the swap, should you come across something unexpected: http://www.nicoclub.com/zerothread?id=78205

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thanks alot man,i needed that info.

[mys13rocks]

nice input good job