Trip Odometer Fix/Pics
#151
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Car: 1988 Camaro RS
Engine: 5.0L V8
Re: Trip Odometer Fix/Pics
I'm in Canada and I need an etest for my car... And it won't pass with the broken speedometer cable. Can someone please send me a step by step tutorial so I can attempt to fix it. Thank you
#153
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Car: 1992 Camaro RS
Engine: 3.1 Liter V6 TPI
Transmission: Automatic
Axle/Gears: 3.23
Re: Trip Odometer Fix/Pics
The trip odometer is one of the most common engineering disasters on thirdgen cars (symptoms of failure are listed in post #25); however, the fix is both simple and inexpensive--my cost $.09 at the local hardware store.
To access the speedo, remove the black bezel. Once that's removed, look in the rectangles that house the e-brake light, check engine light, etc., and you'll note a, I believe, 10 mm nut on each side of the cluster housing. Move the seat back all the way. Drop the lower dash panel for access to the speedo cable and its clip (this clip holds the cable to the speedo head). A long-shanked, flat-bladded screw driver is perfect to trip the clip. A flash light/trouble light is indispensible. Once the cable is free, so is the cluster. Lowering the steering wheel, and/or dropping the steering column a fraction will help in the removal but is not necessary. To protect from scratches use a bit of masking tape on the steering column.
Note the speedo cable clip.
JamesC
To access the speedo, remove the black bezel. Once that's removed, look in the rectangles that house the e-brake light, check engine light, etc., and you'll note a, I believe, 10 mm nut on each side of the cluster housing. Move the seat back all the way. Drop the lower dash panel for access to the speedo cable and its clip (this clip holds the cable to the speedo head). A long-shanked, flat-bladded screw driver is perfect to trip the clip. A flash light/trouble light is indispensible. Once the cable is free, so is the cluster. Lowering the steering wheel, and/or dropping the steering column a fraction will help in the removal but is not necessary. To protect from scratches use a bit of masking tape on the steering column.
Note the speedo cable clip.
JamesC
Check out my ham web site, go to https://www.qrz.com/index.html
Then in the upper left hand corner type in my call sign...... N8TCQ. Caps aren't required.
Thanks to everyone on here, your information and experience is invaluable.
More info, I fixed the tach problem. Found the info on this web site. Had to cut a foil path to the resistor chip, then put 2 resistors in series. One was a 100K, the other was 150K. That adds up to 250K or 250,000 ohms. That's about 6,000 ohms less than recommended but it was parts I had on hand. The resistors were 1/2 watt types. You could probably get the exact value of 256K from Mouser or Digikey.
Still working on the speedo, need to lube it up. I'll post results soon.
Last edited by OldMuscleCarGuy; 05-01-2017 at 10:52 PM. Reason: Added Info
#154
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Car: 1989 Iroc-Z Convertible
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 2.73:1
Re: Trip Odometer Fix/Pics
Thanks for this write up and pics! Worked like a charm.
Actually, took two tries, though, so I have a couple of simple recommendation if these haven't been mentioned yet.
One, as James stated, make sure to push in on the reset stick to fully seat the axle when wiring it up.
Two, bench test the odometer/trip with a cordless drill before re-installing in the car. I thought I was all good, but the trip still didn't work in the car on the test drive. Had to pull the cluster back out and fix, the issue was that the wire I used might have been a bit too thin, and/or I didn't seat the axle fully. If I had tested it before reinstalling the cluster, I could have avoided the second cluster pull.
Actually, took two tries, though, so I have a couple of simple recommendation if these haven't been mentioned yet.
One, as James stated, make sure to push in on the reset stick to fully seat the axle when wiring it up.
Two, bench test the odometer/trip with a cordless drill before re-installing in the car. I thought I was all good, but the trip still didn't work in the car on the test drive. Had to pull the cluster back out and fix, the issue was that the wire I used might have been a bit too thin, and/or I didn't seat the axle fully. If I had tested it before reinstalling the cluster, I could have avoided the second cluster pull.
#155
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Re: Trip Odometer Fix/Pics
actually, i know from experience, if you pull the guage cluster and undo the little computer attatched the speedo and swap that on to your current speedo it will then be a 140MPH speedo. you will of course also need to swap the faceplate/guage face. i broke my spiffy 145MPH speedo and tested this theory. mine works great.
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