Manual conversion (wiring)

[Guest]

car is a 1991 GT Wagon facelift. Just wondering what needs to be done about the wiring?..Wanting to use a wrx ecu from a manual. Cheers.

[Guest boostcut]

what exactly are you doing? a manual conversion or just the ecu?

[Guest]

yep the whole conversion from auto to manual. The only thing holding me back atm is the gearbox wiring

[Guest boostcut]

oh i see, use the search function man, im sure i saw some wiring diagrams/how to in there somewhere.

[Guest]

yeah i thought i did to..have searched for the last 2 days no luck anyway will do another search

[Stoffa]

As far as I know you just need to rewire the reverse light switch and sort out the engine kill switch that only lets you start it in park or neutral, that more than likely would just need to be earthed out.

Try searching here www.nasioc.com

[funkytown]

yer the early ecu's just has a wire on the ecu end to tell the ecu it was auto or manual, so ecu swap shouldnt be required afaik...

only on the early RS GTs tho

[Guest]

If its anything like my forester (which I doubt) you just have to bypass the Park switch by shorting out a couple of wires in your center consol to get the car to start. Then there is a couple more wires you have to short out on the gearbox loom and attaching the manual speedo unit to the gearbox... Dunno about those though, mine was done via a phone conference between me (completely clueless) Boostin and my sparky mate

[Wiretap]

all you need to do:

Cut AT/MT select wire (I cannot remember which plug this is, but its pin 18 and is a Black/White-Stripe wire), leave enough to reattach if you cut the wrong wire.

Short the 'park' switch in the centre console

Wire up the reverse position on the old loom to the manual loom's reverse switch

Optionally wire up the Neutral position switch (this does nothing on 4-plug manuals as far as I can see)

[Guest]

 Wiretap said:

all you need to do:

Cut AT/MT select wire (I cannot remember which plug this is, but its pin 18 and is a Black/White-Stripe wire), leave enough to reattach if you cut the wrong wire.

Short the 'park' switch in the centre console

Wire up the reverse position on the old loom to the manual loom's reverse switch

Optionally wire up the Neutral position switch (this does nothing on 4-plug manuals as far as I can see)

hey cheers mate..

so short circuit by earthing both wires?? Pin 18 and park

Thanks

[Guest boostin]

 Wiretap said:

Short the 'park' switch in the centre console

I never had to do this. I connected the reverse and neutral switches into the inhibitor wiring, and as I had cruise control, I added a clutch switch and connected that to the other neutral circuit of the inhibitor switch. Just gotta have the clutch slightly down to start it now.

[Wiretap]

 1992-RS']

[quote name='Wiretap said:

all you need to do:

Cut AT/MT select wire (I cannot remember which plug this is, but its pin 18 and is a Black/White-Stripe wire), leave enough to reattach if you cut the wrong wire.

Short the 'park' switch in the centre console

Wire up the reverse position on the old loom to the manual loom's reverse switch

Optionally wire up the Neutral position switch (this does nothing on 4-plug manuals as far as I can see)

/quote]

hey cheers mate..

so short circuit by earthing both wires?? Pin 18 and park

Thanks

Pin 18 is not a short, if you do you may set something on fire as I beleive it's a +12vIG wire, and the park switch is two wires, join them.

[Wiretap]

 boostin']

[quote name='Wiretap said:

Short the 'park' switch in the centre console

/quote]

I never had to do this. I connected the reverse and neutral switches into the inhibitor wiring, and as I had cruise control, I added a clutch switch and connected that to the other neutral circuit of the inhibitor switch. Just gotta have the clutch slightly down to start it now.

I rewired as per the official wiring diagrams, a bit messy but it worked... and I got to ditch the TCU

[Guest boostin]

My TCU is gone too, along with the shift lock controller.

[gtlegacy]

http://legacycentral.org/library/transmission/convert.htm go here and in the electrics

follow what they did it works the exact same i did this in mine and works perfect and no cels

no need for tcu or shift lock

basically all you need to do is find a plug from an auto trans that will plug into your loom and connect the wires on the manual gearbox (reverse and neutral) and short 2 of the other wires together i cnt remember if the auto manual slection for ecu is grounded or not grounded

just follow the instrictions they worked for me has everything there you need juts check and double check before cutting wires lol

[gtlegacy]

also cars without the cruise control just need to have the 2 wires joined together for the starter to be active

[Guest boostin]

 gtlegacy said:

also cars without the cruise control just need to have the 2 wires joined together for the starter to be active

Yeah mine has cruise, and I had a real fun time trying to retain it. I did in the end, had to use a change over relay.