Speedo not working - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

struka · 11-10-2020, 02:09 PM

Issue: Speedo isn't working

The car is a 1996 S14, the engine is KA24DE-T running S13 ECU (enthalpy). Trans is out of an s13 but the speed sensor is from S14.

Back story:
I did a 5spd swap back in 2005 and disconnected the speedo because it read twice as much (running an s13 trans). Never got a speed sensor so just unplugged it.

Finally wanted to fix my speedo so got an s14 speed sensor. Wired it directly up to the harness plug (green/black wires) that is located behind the relay box. Unfortunately with it wired up, it does not seem to work. According to the seller (acquaintance) of the speed sensor, it was working when removed.

Any ideas?

S14rebuild · 11-10-2020, 02:13 PM

Have u tried spinning the speedo by had or with a drill and see if it reads on the cluster? Could there be a gear mesh issue?

struka · 11-10-2020, 03:10 PM

Quote:

Originally Posted by S14rebuild

Have u tried spinning the speedo by had or with a drill and see if it reads on the cluster? Could there be a gear mesh issue?

I have not. But let me make sure I understand correctly. Are you saying having it wired up just like I have it but trying to spin the speed sensor outside of the transmission by hand or a drill?

S14rebuild · 11-11-2020, 04:37 PM

Yes, key on, sensor plugged in and spin the speedo see if the gauge works.

DiscountPirate · 11-16-2020, 11:50 AM

Unless you know and trust the person you got the sensor from, don't believe it when they say something is known good unless you bench test it yourself. I assume you already know there are s13 and s14 speed sensors, and you just need to use whichever one fits and matches cluster.

11-10-2020, 02:09 PM	#1
struka Zilvia Member Join Date: Oct 2004 Location: Nashville.TN Posts: 259 Trader Rating: (2) Feedback Score: 2 reviews	Speedo not working Issue: Speedo isn't working The car is a 1996 S14, the engine is KA24DE-T running S13 ECU (enthalpy). Trans is out of an s13 but the speed sensor is from S14. Back story: I did a 5spd swap back in 2005 and disconnected the speedo because it read twice as much (running an s13 trans). Never got a speed sensor so just unplugged it. Finally wanted to fix my speedo so got an s14 speed sensor. Wired it directly up to the harness plug (green/black wires) that is located behind the relay box. Unfortunately with it wired up, it does not seem to work. According to the seller (acquaintance) of the speed sensor, it was working when removed. Any ideas? __________________ Team Rowdy

11-10-2020, 02:13 PM	#2
S14rebuild BANNED Join Date: May 2019 Location: Florida-FAIL Posts: 2,495 Trader Rating: (8) Feedback Score: 8 reviews	Have u tried spinning the speedo by had or with a drill and see if it reads on the cluster? Could there be a gear mesh issue?

11-11-2020, 04:37 PM	#4
S14rebuild BANNED Join Date: May 2019 Location: Florida-FAIL Posts: 2,495 Trader Rating: (8) Feedback Score: 8 reviews	Yes, key on, sensor plugged in and spin the speedo see if the gauge works.

11-16-2020, 11:50 AM	#5
DiscountPirate Zilvia Member Join Date: Jul 2016 Location: SoCal Posts: 189 Trader Rating: (0) Feedback Score: 0 reviews	Unless you know and trust the person you got the sensor from, don't believe it when they say something is known good unless you bench test it yourself. I assume you already know there are s13 and s14 speed sensors, and you just need to use whichever one fits and matches cluster.