bamxbam

iTrader: (2)

Car has 77k miles on it, always been pretty reliable until yesterday on the way back home from after taking the GMAT, my speedometer decides to suddenly stop working along with the odometer. After doing a crapload of reading and researching last night, I narrowed it down to either the VSS or the wiring harness for it. Hoping it would just be the sensor, I installed a brand new VSS today (T56 btw) to no avail, so now I'm left to think it's the wiring, which I have NO IDEA how to route it from the PCM to the VSS if I had to rewire it, and I know the voltage has to be checked somehow at the wires but from what I understand they only give a reading if the wheels are moving... how am I supposed to lay under the car while moving the wheels at the same time? Thoughts and advice?

flame

iTrader: (13)

If it doesn't set a code for no VSS then the pcm is still seeing the speed signal. That would indicate that the gauge cluster is the problem or the wiring from the pcm to the cluster. Best option is to get it scanned for codes and see if the pcm has a mph reading.

bwkmaro

go get it scanned by a ob2 scanner to see if its getting signal from the sensors a reg handheld will tell you engine speed. chances of both sensors going at the same time are slim
prob a problem with the cluster

bamxbam

iTrader: (2)

Thanks for the reply, I don't have HPtuners or anything but I had it checked with the scanner at autozone and it didn't have any codes. How can you tell if it's a problem with the gauge cluster or problem with the wiring? When I pulled fuse 7 out the gagues swept typical 99' style including the speedometer so does that mean I can rule the gauge cluster out? I don't feel comfortable working with electronics, so how much would it roughly cost to get the wiring replaced at a shop?

bwkmaro

^oh my you dont wanna know. go back to autozone and have them check to see if your actually getting a rpm reading on thier computer i know itll tell them. you car must be running there are basic things you can looks at through the scanners rpms is one of them. if you had a auto and the vss goes you only have first gear kinda sucks lucky you got a 6 speed

bamxbam

iTrader: (2)

Well, the RPM gauge works, the only things on the cluster that don't are the speedometer and the odometer. Cruise control does not work. Went back under earlier and tried cleaning some crud out of the hole where the sensor goes, funny thing is the magnet on the sensor I replaced seems a lot stronger than the new one. Don't the wheels have to be moving in order to give a voltage signal? I have a multimeter but don't know wtf to do with it so I'm thinking of having a shop look at it...guess it's either the gauge cluster of the wires?

bamxbam

iTrader: (2)

bump...anyone? Know there's some geniuses out there

01WS6/tamu

iTrader: (37)

If your cruise control is operational then you have a speed signal. got money on a dead cluster these cars aren't new anymore now age is catching them and not miles for some of us.

bamxbam

iTrader: (2)

Cruise control does NOT work... so does this point to the wiring? I don't understand how you're supposed to replace the wires without dropping the transmission, the harness seems to go above it into the tunnel? This is so confusing, it has been working just fine for the 4 years I've owned the car and without any warning the speedometer just stops working??? I haven't hit a pothole, puddle, or anything recently that could possibly mess the car up in a long time so wtffff

flame

iTrader: (13)

You need to see if the pcm is getting the speed signal. Easiest way is on a scanner with live data. Otherwise you need a multimeter and the knowledge to test it.

bamxbam

iTrader: (2)

I have a multimeter but no knowledge of how to test it, tried getting some kind of reading from the sensor wires with the ignition turned on without any success, from what I remember, the wheels have to be moving to be able to get any kind of signal. At this point I'm assuming the pcm isn't getting the speed signal since cruise control doesn't work, and a new VSS didn't help. How much can I expect to pay in labor for the VSS wiring to be replaced?

01WS6/tamu

iTrader: (37)

start with a scanner and see if the pcm shows a vss signal.

flame

iTrader: (13)

You missed the point that if there are no codes then the pcm is seeing the signal. The sensor outputs ac voltage when the driveshaft is spinning. The only test you can do without spining it is resistance test on the speed sensor to see if you got a bad one but no spec available in Mitchell.

bamxbam

iTrader: (2)

Well I did replace it with a new VSS sensor as and it didn't do any good as mentioned. Since the gauges including the speedometer swept when I pulled/inserted fuse #7 would you rule out the instrument cluster and guess that the wiring is bad? Unfortunately don't have any tuning software or scanners, and my car didn't throw any codes when scanned at Autozone. I'm hoping it's a bad sensor or cluster instead of the wiring...because in that case I'll most likely have to take it somewhere even though I'd like to fix it myself.

lt1pwr1

iTrader: (1)

Most likely you have an issue with the wiring going from PCM to the VSS. However, as mentioned, it is best to see if the PCM is getting speed signal via scanner. If it is, then you either have a problem from the PCM to the Cluster, or within the Cluster itself.

bamxbam

iTrader: (2)

Had it looked at, and the PCM does see a speed signal, so I was told it was the servo-motor on the speedometer needs replacing. Tried searching for a "servo motor" for Camaro/LS1 without much success, how can I acquire this part? Would hate to have to replace the whole cluster.

SSpdDmon

iTrader: (10)

Did you check the connections on the passenger side of the trans? I had a loose connector that caused my speedo to no work.

Edit - never mind on that.

If you need cluster repair, there are companies that help with that. Try SPECMO. I think they helped me out.

Z28RS

I had a similar problem last summer, except my entire gauge cluster went dead while I was driving to work on the interstate at 70 mph. It turns out that the gauge cluster fuse had blown. If you haven't done so already, you may consider checking your fuse panel, just in case. Hopefully, it will be a quick and easy fix for you like it was for me! Good luck, man!

bamxbam

iTrader: (2)

Tried installing another gauge cluster, and the speedometer still won't work, the needles all swept right to left on it upon installation so I'm sure the driver/motor is good. I am now convinced it's a wiring problem between the gauge cluster and PCM, because I had a scanner hooked up to it last time and it was showing the speed on there. Seems like the majority of the shops I called are not interested in fixing this or want to charge a huge diagnostic fee... where do I go from here?

bamxbam

iTrader: (2)

bump for the geniuses out there