Odometer not working - Chevy Impala SS Forum
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post #1 of 16 (permalink) Old 03-23-2014, 08:36 PM Thread Starter
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Odometer not working

I got a 93 Roadmaster 2 days ago. Before driving it home 135 miles, I gassed up and reset the trip meter. The next day I noticed the trip meter only said 58. After looking closer I noticed that neither the Odometer or trip meter are always working. In fact after re-setting the trip meter and driving another 10 miles, neither the odometer or trip meter moved. Speedometer works fine all the time.

It was hit in the left front before I bought it, so I wondered if that might cause the odometer not to work. My son put in a new front core support and radiator before I could drive it home. Now I need to figure out how to replace the fender.

Any suggestions would be appreciated.
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post #2 of 16 (permalink) Old 03-23-2014, 10:16 PM
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My first guess is that there is a bad circuit board on the cluster. If the speedo works and the odos do not, it means the board is getting a signal from the VSS, but it is not getting to the odos. If you need a board, I have a couple.

The fender is easiest to do if you get one with the brace (not wheelhouse) and the hood hinge attached. You have to unbolt the hood on the side to be swapped, detach the hood strut at the fender (brace the hood), remove the two rows of screws around the wheelhouse 10 & 13mm, the corner of the core support 10mm, bumper cover 10mm, remove the headlight mount 10mm, two beside the vapor cylinder 13mm, one at the rear trianglulators 13mm, one under the foam at the end of the rear hood seal 13mm, one screw under the fender Phillips, and the two at the door hinges 13/15mm (open the door). Make sure you save the shims. You may have to loosen/remove the wheelhouse extension 7/10mm to get the bumper cover low enough to get the fender off.

1991 OCC 461 (.030 over 454) BBC, 3.23 posi, flash to pass, drop spindles & springs, Impala rims, Hydroboost, Recaros, MOMO/wood SW w/QR, custom wood shift knob, Pioneer DEH P77DH
1992 OCC now with 5.7 tbi, DEH P77DH
For a parts list, check https://www.impalassforum.com/vBulle...ion-parts.html
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post #3 of 16 (permalink) Old 03-23-2014, 10:26 PM
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If you need a wheelhouse, get the fender with it attached. You only have to remove the two bolts behind the wheel, and the three around the vapor canister, and the accessories on the wheelhouse. Be careful with the ABS connector, they are generally fragile, and will often crumble in your hand. You can splice another one in, if it does. To replace the wheelhouse with the fender, you do not have to remove the 10mm bolts around the wheel opening or the 13mm ones between the fender brace and wheelhouse.

The fender can come from any year, but the wheelhouse is 91-93 specific, but can come from a Caprice sedan or any 91-93 wagon.

1991 OCC 461 (.030 over 454) BBC, 3.23 posi, flash to pass, drop spindles & springs, Impala rims, Hydroboost, Recaros, MOMO/wood SW w/QR, custom wood shift knob, Pioneer DEH P77DH
1992 OCC now with 5.7 tbi, DEH P77DH
For a parts list, check https://www.impalassforum.com/vBulle...ion-parts.html
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post #4 of 16 (permalink) Old 03-23-2014, 11:23 PM Thread Starter
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Thanks for the reply....As for the fender, I have the inner and outer fender. I noticed yesterday that the wheelhouse does have some damage near the front right. I'm new to replacing body parts, so I don't know if will work as is or not. See the picture I've attached.

About the odometer..if it's a bad circuit board, are you suggesting that I would replace just the board and not the whole cluster? How much would you sell a circuit board for? I'm assuming then that the odometer and trip meter are controlled electronically?
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post #5 of 16 (permalink) Old 03-24-2014, 12:22 AM
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Replacing the wheelhouse is not a big step from replacing the fender. The one you have could be worked back into shape with a hammer and dolly. If you have one, I would just replace it.

The circuit board is fairly easy to replace, you just have to be careful putting the screws back into the plastic. They have a dual thread trace, and if you get the large one in the small track, it will strip the plastic. You can tell if you have them in correctly because they will thread in with your fingers until they are almost completely installed. I believe the issue is with the circuit board, because both of the odos are not working and the speedo is, which means that the signal is good to the cluster. The speedo and the odos use the same signal.

I can sell you a board for $30, or a complete cluster for $55. You will have to swap your cumulative odometer to the donor part, or take the one in the donor apart and adjust the mileage. It is a simple Geneva mechanism.

1991 OCC 461 (.030 over 454) BBC, 3.23 posi, flash to pass, drop spindles & springs, Impala rims, Hydroboost, Recaros, MOMO/wood SW w/QR, custom wood shift knob, Pioneer DEH P77DH
1992 OCC now with 5.7 tbi, DEH P77DH
For a parts list, check https://www.impalassforum.com/vBulle...ion-parts.html
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post #6 of 16 (permalink) Old 03-24-2014, 01:13 PM Thread Starter
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Thanks again for the info! Do you test the circuit boards that you sell...or can they be repaired?
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post #7 of 16 (permalink) Old 03-24-2014, 01:16 PM Thread Starter
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Thanks again for the info!

Do you test the circuit boards that you sell...or can they be repaired?
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post #8 of 16 (permalink) Old 03-24-2014, 01:31 PM
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I have not had the replacement boards fail. I do not know if they can be repaired, but if you know what is wrong with it, I assume it can be. Figuring out what is wrong with it is the main problem. There are some resistors that get hot, and could be the culprit, but you would have to know the value of the resistor.

1991 OCC 461 (.030 over 454) BBC, 3.23 posi, flash to pass, drop spindles & springs, Impala rims, Hydroboost, Recaros, MOMO/wood SW w/QR, custom wood shift knob, Pioneer DEH P77DH
1992 OCC now with 5.7 tbi, DEH P77DH
For a parts list, check https://www.impalassforum.com/vBulle...ion-parts.html
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post #9 of 16 (permalink) Old 03-25-2014, 11:17 AM Thread Starter
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How is the circuit board installed?
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post #10 of 16 (permalink) Old 03-25-2014, 10:44 PM
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Once you have the cluster out, there are a lot of gold colored screws around the perimeter of the board. Protect the face, and remove all of the gold screws, then you can lift the black cover, and pull the board off of the pins of the gauge motors. Work carefully from the top and bottom, and do not overly bend the board. There is a black cover over the back that needs to be retained. Unplug the odometers, and you have it off. The cumulative odometer is screwed to the face from the back, and can be removed to swap with the donor, or the donor can be disassembled and the mileage changed to match the original in your car. As stated prior, make sure you put the screws in the correct traces, because they will strip if you do not. Use your fingers to turn them in almost all of the way. If they will not go in with your fingers, they are in the wrong trace (once in a while they will be a little stiff to turn). When reassembling, make sure you wipe any fingerprints off of the face before installing the cluster.

1991 OCC 461 (.030 over 454) BBC, 3.23 posi, flash to pass, drop spindles & springs, Impala rims, Hydroboost, Recaros, MOMO/wood SW w/QR, custom wood shift knob, Pioneer DEH P77DH
1992 OCC now with 5.7 tbi, DEH P77DH
For a parts list, check https://www.impalassforum.com/vBulle...ion-parts.html
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