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extremely simple FD tach/ odometer repair

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Old 06-29-16, 01:50 PM
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Not a solution but just a note:

The speedometer and tachometer are somehow connected. I mentioned that because of my jumper wire, I must have the lights on for the tach to work. They also must be on for the speedometer and odometer to work.
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Old 11-17-16, 04:45 AM
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I have the same issue right now.
My Tachometer stops working.
Any news which wire has to be jumpered for the tach signal?
I will go this way before soldering something.
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Old 11-17-16, 09:20 AM
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Its pin 2b on the ecu pinout diagram.
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Old 11-17-16, 11:04 AM
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Thank. It was really funny today.
Changed the stock ecu through the Apexi and viola, the tach lives
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Old 11-17-16, 01:00 PM
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Caution note: When jumping the wires did not work I attempted switching the wires to make sure I didn't have it wrong. Something I did killed the speedometer too. Whoops!
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Old 11-23-16, 05:54 PM
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Everything in my cluster works except for the odometer, so I tried this fix today. The yellow/blue wire didn't have voltage when the key was on, but the black/yellow wire next to it did. So I used that black/yellow wire as my voltage source, and I tapped the ground into the cigarette lighter ground.

No change. Everything still works except for my odometer. I've already tried soldering in new capacitors behind the speedo. The odometer's back light lights up now, but I still just have faint 8s all the way across both lines.
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Old 01-08-17, 02:19 AM
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So, have been carefully checking the published wiring diagrams and come to the following conclusions:


1) Ground that goes to the tachometer is pin 1E on the 8-pin connector at the back of the instrument panel. This is a Black wire with Blue stripe. This wire also goes through the X-18 20-pin Blue connector on the dash structure behind the instrument panel.


2) +12V power for the tachometer should come from Pin 2D on the 10-pin connector at the back of the instrument panel. This is a Black wire with Yellow stripe. This wire also goes through the X-18 20-pin Blue connector on the dash structure behind the instrument panel.


3) Signal for the tachometer should come from pin 3F on one of the 12-pin connectors at the back of the instrument panel. This is a Yellow wire with Blue stripe. Be careful because there is also a Blue wire with Yellow stripe on the other 12-pin connector, so make sure you get the colors right. The correct wire goes through a number of connectors back to pin 2B on the ECU. It also goes to the pin labeled IG- on the test connector in the engine bay.


Hopefully, that clears up the confusion about which wires should be connected to what and gives people options for jumpering to get the instruments working again.
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Old 01-17-17, 02:35 PM
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Going to try repairing my OEM cluster myself after reading this. Thanks for posting this up
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Old 01-17-17, 03:35 PM
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anyone had any oil pressure gauge issues that were the gauge and not the sender? I fixed my tach and now my oil gauge has died. I tried a second sender and it still doesn't work so I am pretty sure it is the gauge!?
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Old 07-12-17, 05:50 PM
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Gotta bump this one. I have a problem with 94 cluster. Speedometer works find but my odometer no longer works. My cruise control also stopped working when the odometer went out. Anyone have any experience with this?
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Old 07-12-17, 06:19 PM
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VA Fix FD Odometer & FD Speedometer Circuit Board Components

t-von,

Refer to these threads to help fix your odometer. Read them to its entirety. There are a lot of good info to take in.

just got done figuring out how fix fd odometer

FD Speedometer-Odometer Circuit Board - Odometer Components

Cheers,
George
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Old 07-13-17, 01:53 PM
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Thx for the links. Seems my C3 capacitor leaked.
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Old 07-13-17, 03:41 PM
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Any time. Glad to lend a hand. You may also want to use the ...fix odometer... thread for further updates to the repair.

I also recommend taking multiple angle photos of the circuit board since the speedo is removed. It may be useful on future repairs!

Cheers,
George
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Old 07-15-17, 02:01 PM
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Originally Posted by Gen2n3 View Post
Any time. Glad to lend a hand. You may also want to use the ...fix odometer... thread for further updates to the repair.

I also recommend taking multiple angle photos of the circuit board since the speedo is removed. It may be useful on future repairs!

Cheers,
George
Well I changed out the capacitor with a panasonic piece from the links and still no workie.
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Old 07-15-17, 02:03 PM
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Old 07-15-17, 02:16 PM
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Tvon,
Please post your repair remarks to the fix odometer thread. That will prevent inadvertant hijacks and keep the thread relevant to the original post.
Cheers,
George
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