Speedometer Wire

[blinker_fluid]

You have the correct plug in, I circled the wires. The lavender stripe looks black when it gets dirty and even when its clean its more like a dark purple. Do you have the speed sensor plugged into the back of the harness near the starter?

[goalguy02]

speed sensor is plugged in. I will try my old KA speed sensor, maybe this one is dead.

[slow s13]

clawhammer the plugs on the short side are for auto trans, I take it, its a five speed now? still have the resistor on the driver side fender well?

[Clawhammer]

Yeah I figured out those were for auto haha. More details on this resistor? I'm having MAJOR electrical probs right now. :'(

[Tulsa_S-13]

More details on this resistor?

Taken from NICO's Automatic Transmission Ultimate Guide

There are several factors that determine shift firmness, a subject I will cover in later posts, accumalator/line pressure is one such factor. Some of the changes in pressure are determined by the throttle posistion sensor (TPS) and vehicle speed, which is governed by other factors itself. In short, these translate into voltage signals which are intercepted by by the resistor. The name in itself gives you a clue to its function, it resists. The voltage input without something retarding it would run constantly at full load; Letting the TCU know it needs to apply full line pressure/shift firmness all the time. With the resistor "on" it modulates the necessary pressure to provide a more comfortable shift.

In short, because you are running a M/T SR20DET the resistor will have absolutely zero effect on any of your current electrical gremlins. What other problems are you having anyway?

[Clawhammer]

If you're up for a read: zerothread?id=320582

Goalguy, how'd the speedsensor turn out? Did you do the the test they have for it in the FSM?

[SRspoolin]

my whole gauge cluster doesnt work. i switched to a dohc cluster and got nothing. i noticed that the harness that goes from the cluster to inside the dash, the clip that plugs into the cluster were messed up. i got a dohc harness from a friend but my car is a 89 so would that work? or do i need another sohc harness?

[goalguy02]

If you're up for a read: zerothread?id=320582

Goalguy, how'd the speedsensor turn out? Did you do the the test they have for it in the FSM?

No I haven't tested it yet, bad case of lazy hit me this week. Had to get my radiator,thrmo and stuff in first. Gonna do it tonight so I will let you know.

[hashim]

hey sir i have a s14sr20det in a s13 chasis, it was an auto as well, i hooked up my speedometer and its way off, do you know what i need to do to fix this? my email is [email protected], please let me know if you can help, thanks

[blinker_fluid]

I only recommend stuff from my own expiriences, being that I never had an s14 i couldn't tell you. If you try searching I'm sure you'll come up with an answer along the lines of get a different speed sensor or adjust the screw on the back of the speedometer.

[Clawhammer]

If the speedo is off it's because you have the wrong speed sensor. You need the one for your car, simple as that.

[goalguy02]

Ok did some investigating today.

Speed sensor works. It is plugged into the transmission harness properly. transmission harness runs up into fuse box area next to battery. All connections there are tight. From fuse/relay box, I don't know where the wires go to.

Someone who did their own s13/redtop swap, do you have wires left over near batter and if so what color and does your speedo work. In the main engine harness, I see only one yellow wire but it is not the correct one. The only speedo wire I see near the ecu is the correct color and is hooked up running up into the dash and into the cluster.

This is really getting me ticked off. Everything is hooked and working properly. All fuses are good. What am I missing?

$10 through paypal to who ever gives me the info that gets my speedo working.

[Clawhammer]

Yes, there are lots of wires left over.

http://www.frsport.com/SR20DET....html

[goalguy02]

Yes, there are lots of wires left over.

http://www.frsport.com/SR20DET....html

I know there should be some wires left over. It just seems odd that I have two wires in particular left behind battery that match the colors for the speed sensor. They are from the factory plug but there are no wires that match on the SR harness.

[blinker_fluid]

If the speed sensor is in good condition and plugged in then the speedo should be working(as long itself is in good condition). There are 4 wires going to the speedo and 1 wire coming from it. 2 going to it are power and ground, if either of these were disconnected the entire cluster would stop working. The other 2 are the ones coming from the speed sensor. and the one coming from the speedo goes to the ecu which doesn't have to be connected for the speedo to work. Now the only wires that should be of interest are where the speed sensor plugs to the lower harness and where the lower harness plugs in by the relay box. These are the only wires for the speedo that were messed with when doing an sr swap.

Questions:1. does the rest of the cluster work? if not check the 10amp fuse by the pedals.2. did the speedo work before you did the swap?

[goalguy02]

Ok thats some good info.

The speedometer did work before the swap.The speedometer is the only gauge not working. tach,temp,gas,lights all work.

The plug on the lower harness is in good shape and plugged tightly.

I have two wires left over behind the battery that match the colors of the speed sensor wires. They are both yellow with tracers (blue and lavender i believe).The wires are from the one of the two factory KA plugs I had to rewire behind the battery. I connected all the wiring as per the heavythrottle and frsport guides.

Im thinking about raising the rear tires off the ground and running the car in gear to check for signal at the two wires I have behind the battery.

Thanks for the help.

[blinker_fluid]

you ever seen ferris beuler's day off? Just get a multimeter(MM) and set it to ohms. unplug the pigtail of the speed sensor and pull the two pin connector of the lower harness( the one the pigtail goes to) up to near the relay box. Now take one of the MM leads and hook it to one of the two pins, with the other MM lead hook it to the other end of that wire. I pointed out where they end up a few threads back. Its the top grey plug on the long side of the relay box which you have plugged in in the pic the one next to the throttle cable, y/b and y/l remember the lavender stripe looks almost black on my car so yours is probly the same ( it looks black b/c of it being dirty and the fact its a very dark color over a very bright backround). Your looking for continuity in the wire to make sure it isn't broken inside the harness. If it is broken then just run jumper wires from the speed sensor to the grey plug.

To answer your question about left over wires there are alot of them on mine. As for the ones behind the battery they shouldn't have any thing to do with the gauge cluster unless someone really hacked up your harness.

[goalguy02]

Thanks for the ideas.

I have an ohm meter, I just have to figure out how to set it to test continuity.

Thanks again!

[blinker_fluid]

if you being a smarta$$ then do your own troubleshooting, otherwise continutity means its a complete circuit and the ohm meter will display infinite ohms, or 0 ohms, or it will beep. When you touch the leads of the ohm meter together the ohm meter will do something, your looking for the same effect when each lead of the ohm meter is on its respective end of the wire.

[goalguy02]

I wasn't sure if my cheap meter will do a continuity test, Ive only used it to test signals in volts and such like testing the CAS and alternator output. What your saying makes sense.

And I honestly do appreciate the help. You know how sometimes you get burnt out trying to solve a problem. Seeing it from someone elses perspective makes all the difference in the world.

Thanks again!

[SRspoolin]

the harness that plugs into the back of the cluster are messed up on mine. i got a dohc harness from a friend, will that work or do i need a sohc harness since my car is a 89?

[goalguy02]

Did the continuity testing today. On the yellow/blue wire, continuity was good. On the yellow/lavender I got nothing. Pulled the loom wrap of the harness and found a place where the wire had gotten pinched. Not sure how it did, but it was pinched in two. RE-soldered and heat shrinked the connection and the speedo works perfectly. Thanks for all the help. One problem down, two to go!

To the above poster, I read somewhere that the SOHC and DOHC clusters are different. Something to do with the tach signal. Not 100% but searching this site would do you good.

Thanks for the help guys!

[SRspoolin]

To the above poster, I read somewhere that the SOHC and DOHC clusters are different. Something to do with the tach signal. Not 100% but searching this site would do you good.

yeah i know there different. my question is, the harness that plugs into the back of the cluster is ****ed up. do i need another SOHC harness or will a DOHC harness work (i got a DOHC harness from a friend but i dont want to install it if its not goin to work)?

[blinker_fluid]

Glad you got it sorted out, whats the other two problems?

Srspoolin', I never swapped clusters but my guess would be the you need both harnesses, the sohc to plug into the chassis harness and dohc to plug into the back of the cluster and you'll have to splice wires in between (just my guess). I'm not a fan of cutting any of the chassis harness' b/c they are a pia to replace if it gets messed up.

[goalguy02]

The other probs Im having are I keep blowing my a/c fuse, not right away but during a short drive it will blow. Im also having an issue with the car running for 3 seconds after shutting it off and the EGI relay is buzzing. I made other threads about these problems. Thanks again.

[blinker_fluid]

Fuses are put on wires the carry a positive charge, and placed on the end of the wire closest to the power source. This is to prevent the wire from melting/catching fire in the event that it gets grounded before it reaches its destination, aka short circuit. In other words if a fuse blows it means that the wire is getting grounded. Under the electrical section of the dohc fsm look at the power supply routing diagram, should help you to troubleshoot. again hook one lead of an ohm meter to the fuse end of the wire and the other lead to a chassis ground and see if theres continuity, if there is then it means the wire is being grounded.

As for your relay pull it and see if the pins are corroded, you can clean them with windex or electrical cleaner. If thats not it it may not be getting the proper amount of voltage to fully trigger it.

[sjbsuperman1425]

I used the sr speed sensor and my gauge is accurate, it doesn't matter which is used, sr or ka, if its a s13 motor to s13 chassis. The cluster reads in both mph and kph. The only problems are when its an auto swap or an s14 swap in a s13.

i did an auto to manual swap in my 89, except with a CA18DET, and the speedometer didn't work at all. was it because i did an auto-manual swap? i have a JDM cluster now and it works fine.