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Need help identifying wires!

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Old 10-03-12, 10:05 PM
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Need help identifying wires!

OK so my problem is that im not sure if i have the correct wires. my situation right now is that i want to install a hks evc 6 on my 1989 turbo ii. i need two wires. RPM input signal wire, and Throttle Input signal wire. i have a wiring diagram for a 1991 turbo ii, and A) im not sure if its the same as a 1989, and B) im not sure if i have the correct wires. Anyways i looked up in the diagram, connector B2-03 pin 1G with wire colour L/Y should be my rpm input signal wire, and connector B2-23 2G with wire colour B/G should be my throttle input signal wire. My problem with the rpm signal is that should i be splicing into my wire after the igniter at the tach, or should i be splicing it before the igniter near the ecu? My problem with the throttle input signal is that im not sure which one to use. theres a narrow range throttle sensor and full range; I picked the full range one. Ive included pictures of the wiring diagram im using, so if anyone can confirm if i am correct, that would be super awesome! Thanks!!!


Throttle Input Signal?

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RPM Input Signal?

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Description of the two connectors
Old 10-03-12, 10:23 PM
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you can get RPM off the bullet connector at the trailing coil (yellow,something..green,blue red..sorry brain fart).No splicing req'd.
Old 10-04-12, 08:44 AM
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But are the wires i pointed out the correct ones? And is the wiring diagram from 91 the same as 89?
Old 10-04-12, 09:07 AM
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the Y/L wire on the second pic is the Tach (RPM) signal.
Old 10-04-12, 09:09 AM
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Originally Posted by MIDNFauciUSN
the Y/L wire on the second pic is the Tach (RPM) signal.
It is part of the 4 wire harness under the trailing coil... not the 2 wire one.
Old 10-04-12, 09:25 AM
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the B/G wire for you TPS looks right to me.
Old 10-04-12, 10:45 AM
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Originally Posted by MIDNFauciUSN
It is part of the 4 wire harness under the trailing coil... not the 2 wire one.
so youre saying i should splice at the connector for the tach?
Old 10-04-12, 11:27 AM
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Originally Posted by Logitikes
so youre saying i should splice at the connector for the tach?
no, if you look at the trailing coil there is a check connector, B2-07 in the diagram, which is just a bullet connector, so all you do is plug into that.

for the TPS that (2G) is the signal wire.
Old 10-04-12, 01:23 PM
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Originally Posted by Logitikes
so youre saying i should splice at the connector for the tach?
Either way will work. I personally dont have the check connector thanks to the previous owner. The important thing is that you hit the correct wire.
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