actual wiring up the tach

[hybrid240]

will the doch cluster (91-93 analog) plug n play in my 90 harness or is there some rewiring? if so what? if it is cheaper to get the doch custer to work than a big tach, ill do that. plus its on the low.

[F3600]

I think the plug will match but your tach will not work. You need to swap it with one from a SOHC. The signal from the speed sensor is not the same ...

someone can clarify this ? :confused: but i think the rest of the cluster will work fine...

[kazuo]

search search search

KA24E/CA18DE/CA18DET do not use the same tach signal as KA24DE/SR20DE/SR20DET

If you have KA24E and are swapping a SR/KA24DE you need the KA24DE tach so you can swap out the KA24E tach. A SR20DE/DET tach will also work.

You can swap out the whole cluster, but its illegal (then again your motorswap is also illegal, so whatever). Also I am not sure that it will be plug and play.

If you have a digital speedo you are effectively ****ed. Get a aftermarket tach or take a SR20/KA24DE tach and a CA18/KA24E and swap the guts.

or you can tap the CAS wire. (20 i think?) either way, using method one will result in the tach being off by about a grand below 5k, and off by a little less than 200 or so past that. the CAS will result with it being off also all the time but i dont know by how much.

good luck

[DJ Machine]

heres what you do, cut the plug off the KA harness and wire it to the SR harness (just match the colors), that way itll still be plug n play

[hybrid240]

i must not have been real clear. i already know that my tach doesnt work with my sr. everything else works fine. my question was what rewiring. in my search i couldnt find the actual rewiring. it seems no one has done it.
DJ that sounds like it would work. ill probably just end up getting a tach that matches my other gauges.