jer4251

iTrader: (6)

got my car yesterday, knowing it had some little issues, so im tring to fix them

the only part of my cluster that works is the oil pressure, the temp, gas and battery gague.

the speedo, tach, odomiter and trip now worky.

the trip worked until i reset it.

when i start the car, the tach drops to 0 and then way past 7k and stays there.

this was 75 mph when i took this

Bandit5

My first guess is two separate problems: the speedometer cable is broken/disconnected, and the resistor in your tach is broken.

My second guess is that the cluster is not seated correctly in the dash. If you take the cluster out, and then push it back in while the car is on, you can see if changing the position will get those gauges to work.

jer4251

iTrader: (6)

i couldnt get the headlight **** off.

stevenb

Have you checked to see if your cable is connected to the cluster for the speedo and your tach wire is connected to the distributor?

Bandit5

You gotta pull it out as far as it will go, then reach underneath it (look first) and push in a spring loaded pin in. When you push that pin in, you can pull the **** all the way out. I usually have to take out the knee bolster first so I can reach up there. But sometimes I can take the gauge cluster bezel off enough and reach through the hole underneath it with a screwdriver and push up on the pin enough to get it out. If you have small enough hands, you can just reach through there and get it. Also, once you get the bezel off, you can just slide the headlight know back in so you don't have to listen to the chime and have your headlights on the whole time.

jer4251

iTrader: (6)

thanks, will give it a shot after work tomorrow. hope to get everything working properly. pass side window doesnt move either, switch is good, so its either the motor, or wiring.

stevenb

best of luck!

Stevo

iTrader: (45)

You dont have a cable, 90-92 camaro were driven off a VSS(vehicle speed sensor).

That is a good start place though to make sure the whole clusted is seated into the 2 connectors at the back.

Have you checked the codes for the SES light?

I can tell you if the speedo isant working, the odometer wont work and that will trip the SES light right there for the VSS.

Bandit5

It doesn't have a cable that goes to the speedometer, but it still uses speedo gears that turn to send the signal to the VSS.

ryan91rs

iTrader: (1)

ya don't go ripping into the dash yet. I have the same problem with the speedo. It was the VSS. Get it tested at a GOOD shop. and don't get the cheap Chinese one. (trust me it does not work!!!!) Get an AC delco one and get ready for an expensive job. my sensor alone cost $110 and the dealer is the only one that could guarantee the work. everyone else turned ghost white and slowly walked away refusing the work.

Good luck and have the VIN and RPO numbers ready. if they don't ask for them then don't buy from them.

Bandit5

If that is your problem, than I was right... two separate problems. Replacing the VSS is not something I have attempted to do, so I can't help with that. I would go ahead and get that checked out to see if that is the problem. Might be lucky and just have a loose or disconnected wire. Once you fix that, you can fix the tach yourself.

jer4251

iTrader: (6)

removed the cluster, still no fix. so i'ts gotta be the vss. i was under the car with the mechanic b4 i drove it home, and we followed the wire under the car and it "seemed" fine. I'll have autozone run the code. they can do this on a 1992 right? the guy at the shop had also told me my cluster wasnt cable driven, it was digital, that part i was aware of.

thanks for the input. whats so difficult about replacing the VSS???

jer4251

iTrader: (6)

i went ahead and put a wire to pin 5-6 and got the code it was giving me.

first it went 12, 12, 12 then 15, 15, 15

15. Low temperature indicated at engine coolant temp sensor

nothing to do with the speedo. or vss.

should i disconnect the battery to reset the code, and see if i get the same one again?

BigBadLou

iTrader: (3)

Yup, I would disconnect the battery to clear the codes and see if it comes back.

Meanwhile, you can check the temp sender on the front of the intake manifold, just below the TB. It might not be plugged in or the sender might
be simply bad (it might be telling the ECM that the engine is at -50F ).

As for the VSS, a quick question: does your cruise control work? Does the tranny lock the TC in 4th gear on the highway? If yes+yes, then your VSS is likely good.

You can easily check the VSS output by putting the rear on jackstands and running it at maybe 20-30mph and reading voltage on pin D (grey wire) on the C207 (next to the ECM). You should see either 12V AC or something like 8V DC. If no voltage, check pin B10 (yellow wire) on the ECM. Again, if no voltage, it will point to a bad VSS or wiring. At this point, you might want to climb under the car and measure the VSS itself.

Or even safer way: pull the VSS (watch out for fluid coming out ), put it in a drill and spin it (not too fast). Again, you should see voltage on the output.

Hope this helps.
Lou

Lou

jer4251

iTrader: (6)

cruise works just fine, and it does lock the tc in 4th. the car runs great. but no idea how fast im going.

where can i get a new throttle body gasket? i took the tb off and it broke to pieces

jer4251

iTrader: (6)

replaced the temp sensor, disconnected the battery before working on the car. but sofar, no SES light. Looks like that was the problem.

but still no tach, not sure about speedo cause i didnt move the car.

their has to be a reasonable explination. i wish i had my 1991 here so i could swap out the cluster.

anyone near savannah wanna swap clusters to see if mine is bad??

Bandit5

You can probably pull one out of a junkyard cheap. I sold my old cluster...

jer4251

iTrader: (6)

i need to find a junk yard around here. been wantin to hit one up for a while now.

Bandit5

Although I see you are using a 115MPH speedo cluster. If you can find one for an IROC that goes up to 145MPH, that will work just fine. Also, they are worth a hell of a lot more. I got one 5 years for $200 on eBay, and they still sell around the same now. A 115MPH speedo will be much easier to find and is much cheaper.

BigBadLou

iTrader: (3)

Your tachometer driver module (inside the cluster) is bad, that's for sure.

As for the speedometer, did you measure the signal on pin D of C207 (grey wire)?

Lou