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96 L Turbo Wagon
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Discussion Starter · #1 · (Edited)
Here it goes

I bought an EDM 97 wrx cluster that is LHD. Apparently a 97 wrx has VSS (not cable). My 96 L is cable so I swapped everything over to my stock cluster while utilizing the cable sensor (needle and gauge face swapped in).

Here's my problem... the temp gauge does not move (needle sits at the bottom and my gas gauge is sitting at half when I had a 1/4 tank when the stock cluster was removed. Reset the ECU and nothing changes. Any thoughts on this? I may just take it back apart but I thought I'd post first

Also on a side note my stock cluster tops at 140mph while the EDM one tops at 160mph so my actual speed is slower than what the speedo reads. Easy fix is to just swap the stock one in using the EDM needle but I figure I'd check to see if there is a way to keep the EDM one and read correctly

Thanks
Alex



Video


P.S. If anyone knows how to embed a photobucket video lmk
 

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1995 WRX 2015 F150
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1,886 Posts
Which printed circuit did you use?

I think you have a ground issue, try running an extra ground wire from the negative screw on the back of the gauge directly to chassis ground and see if it works.

You'd need a converter box that goes inline with the speedo cable to correct it. Problem is I don't think one is available for what you want to do. There was one made that converted kph to mph.
 

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96 L Turbo Wagon
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Discussion Starter · #4 ·
I am using the stock cluster shell/circuit. I'm not really sure which screw is for the negative ground?

For the speedo I'll just use the stock 140mph one and not worry about it.

Thanks for the reply
 

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Cluster Specialist
1999 Impreza RS - WRB
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504 Posts
OK, here goes nothing.

First, the Subaru gas gauges can be a little notorious. I've had fuel gauges sometimes "fluctuate" up and down before they settled in. Usually, I would leave the fuel gauge level at its lowest point before putting the gauge in the cluster. If it is fluctuating up and down during driving, it is not a huge concern.

Second, I second 69Subaru360 on checking the screws for the temp gauge. All three have to be screwed in properly to work. These screw into the same places as the USDM ones, so it troubleshoots the same way.

The only semi-accurate way to use a UKDM 160mph gauge face would be to use an STi Option 260 km/h speedometer and swap the face onto that one. I've had a thought about converting the speedometer to run a mechanical sensor, but I'd need to get another UK speedo to try it.

Oh, and welcome to the LHD turbo cluster world, Pioneer. :D
 

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96 L Turbo Wagon
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Discussion Starter · #10 ·
^lol thanks. That helps. I was thinking that the fuel gauge might have to be set low so it can adjust up so I'll try that.

I'm going to mess around with the temp one and see what I can do.

As for the speedo I'll just be swapping in my 140mph one.

I do love the cluster though, just need to make everything work right! Thanks! I'll update when I get the chance to take it apart again but anyone that has any other suggestions please feel free to comment. Thanks guys!
 

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Discussion Starter · #11 ·
Okay so I took the temp/fuel gauges out and reinstalled. Checked the pins (which are the same). Moved the fuel needle to "E" and neither are still reading.

I guess I should try to re-ground both of them now?
 

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needs more cowbell
95L, 07 2.5i, R6
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I'll be watching this thread because I just purchased the same cluster. Had no idea the speed reading would be off... guess I should have searched. I'll compare the circuits and see what's up about the fuel and temp gauges, they looked to be the same at first glance. I really don't understand how the speedo could be off though... since they are both mph. Maybe its from using a two wire vs three wire speed sensor on the trans or vice versa? (DERP, just realized you are running your mech speedo mounted behind the 160mph gauge... I wasn't paying attention) :p

Ok, I compared the edm elec speedo cluster to my 95l and the wiring is the same except the edm needs one speed wire from the transmission that I will have to add. The temp and fuel pins are all in the same spot. You will need to make sure both gauges get - and +. Maybe a fuse got popped or one of the traces got cut. The + comes in from the right side of the cluster and runs all the way to the left, feeding the fuel, temp, and the positive side of the bottom row of warning bulbs. If those warning bulbs are working the fuel and temp gauges should have +. That would lead me to believe they aren't recieving ground like previously suggested. You can just get two long pieces of wire and connect them with a small loop terminal (to ground to the frame) and install loop terminals on the other ends and screw them to the cluster - locations for the fuel and temp gauges to be sure. I would use two pieces of wire about a foot long each and three small (red or blue) ring terminals. You will basically end up with a "V" with a small ring terminal on all three corners.
 

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Discussion Starter · #13 ·
I'll be watching this thread because I just purchased the same cluster. Had no idea the speed reading would be off... guess I should have searched. I'll compare the circuits and see what's up about the fuel and temp gauges, they looked to be the same at first glance.
Yours will read correctly as long as you swap the whole piece in. I put the EDM gauges in my stock cluster and was curious to see the 160mph face on my stock speedo unit.

The EDM cluster I had was VSS while mine was cable so I couldn't use that EDM speedo. I ended up just using the orange needle on my stock MY96 speedo unit.

I still haven't had to chance to add some extra grounds to the temp/fuel so they currently are not reading
 

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needs more cowbell
95L, 07 2.5i, R6
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I'll have to eliminate my cable and convert to an electronic sensor at the transmission, not sure whether to use a two or three pin sensor though. I'll probably try a two pin first, sucks I sold the one out of my other transmission to a member here a while back. Wish I would have kept it now :rotflmao:



Yours will read correctly as long as you swap the whole piece in. I put the EDM gauges in my stock cluster and was curious to see the 160mph face on my stock speedo unit.

The EDM cluster I had was VSS while mine was cable so I couldn't use that EDM speedo. I ended up just using the orange needle on my stock MY96 speedo unit.

I still haven't had to chance to add some extra grounds to the temp/fuel so they currently are not reading
 

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Discussion Starter · #16 ·
I'll have to eliminate my cable and convert to an electronic sensor at the transmission, not sure whether to use a two or three pin sensor though. I'll probably try a two pin first, sucks I sold the one out of my other transmission to a member here a while back. Wish I would have kept it now :rotflmao:
I wasn't aware you could convert. You should make a DIY
 

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needs more cowbell
95L, 07 2.5i, R6
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9,316 Posts
I wasn't aware you could convert. You should make a DIY
I may

Considering there is only one input to run the elec speedometer on the edm cluster I can assume it only needs one signal wire. The impreza transmissions from 93+ to at least 05 (my current RS transmission) will accept a sensor or the cable. I actually removed the speed sensor from mine and sold it. The cable is actually screwed in currently and running my 95 cluster. When the edm cluster gets here I'll need a speed sensor for the transmission. Then I'll yank out the cable and run the two wires from the sensor in the same location the cable was. One wire should go to the speedo input and the other will go to either ground, 12v, or 5v... that is the part I'm unsure of. I may also have to use a three wire sensor which I believe takes a 12 or 5v input. Elislider was mentioning it in another thread I'll have to look up.
 

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needs more cowbell
95L, 07 2.5i, R6
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9,316 Posts
I tried using the pulse signal from an old speedometer from a wrecked impreza. All it has is a magnetic reed switch which provides a pulsed signal. I was going to try leaving the cable for now and just using the switching signal from the speedo section but that was full of fail. Apparently this speedometer needs an ac signal. Here is a pic of the attempt :lol:



I'm going to try installing a sensor in the transmission next but may not be able to get to it for a few days, busy weekend coming.
 

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needs more cowbell
95L, 07 2.5i, R6
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9,316 Posts
I installed the two wire speed sensor and connected one lead to ground at the speedo and the other to "sp". Connecting the wire to "sp/c" didn't do anything when testing out of the car but using the "sp" made the speedometer function. I just tried installing it yesterday and found two things:
-The speedometer shows exactly double of what it should read and
-my cruise will not work.

Apparently the output wire of this speedometer doesn't send the same signal the ecu needs to create the cruise control signal. I may try using the "sp/c" as the input and the "sp" as the output to the ecu but it seems like "sp/c" would be "speed" "computer" so it would be currently wired correctly. The mechanical speedometer just used a magnetic reed switch to ground which sent and pulsed ground pulse to the ecu to create the cruise function, I'm not sure how the electronic one should work... unless the edm ecu uses a totally different signal. Either way I need to get the speed to be accurate and regain cruise control or this cluster will be pointless to have. Will update if I find anything.

It would be nice to have the electrical diagram for the edm impreza this cluster came from, to verify I'm using the correct wiring configuration.
 
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