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Old 08-13-2018, 10:13 PM   #1
rfisher
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Default L100 instrument light rheostat needed

hi saturn sages- glad to be back on the forum. having a tough time finding a replacement instrument light rheostat or dimmer switch for the dashboard lights. all efforts have failed so far(reillys, advanced, auto zone, bennets, napa, chevrolet dealers, even gmpartsnow). vehicle is my 2001 L100 saturn sedan. the wheel type switch is under the left side ac vent . switch is to the right of the trunk release button. told the part is no longer available or discontinued. gm part number was 9104893. anybody replaced one of these and has a source for it? thanks tons bob fisher

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Old 08-14-2018, 08:16 AM   #2
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Default Re: L100 instrument light rheostat needed

Junk yard is your source, unless a used one pops up on Ebay

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Old 08-14-2018, 12:33 PM   #3
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Default Re: L100 instrument light rheostat needed

thanks floridas- will try that as my last resort. electrical parts are risky from junkyards, but may have no alternative. hoping a sage on this forum has one in his junk pile. regards bob fisher

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Old 08-14-2018, 01:32 PM   #4
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Default Re: L100 instrument light rheostat needed

Is this it? https://www.autozone.com/electrical-...17798_659691_0

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Old 08-15-2018, 01:06 AM   #5
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Default Re: L100 instrument light rheostat needed

^Dsaturn's information is correct. What is striking to me about this is that AutoZone may be the last supplier selling this switch. It can no longer be found through AC Delco's online catalog. The part number was accurate on an OE website, gmpartscenter.net, but was listed as discontinued. RockAuto no longer lists the part (it was there for a very long time).

My assessment of this situation: if anyone is considering acquiring a new dimmer switch then they probably shouldn't waith too long. This switch was not a utilized by GM in North America for any division other than Saturn. There probably aren't all that many left.

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Last edited by pierrot; 08-15-2018 at 01:12 AM..

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Old 08-15-2018, 06:18 AM   #6
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Default Re: L100 instrument light rheostat needed

Quote:
Originally Posted by rfisher View Post
hi saturn sages- glad to be back on the forum. having a tough time finding a replacement instrument light rheostat or dimmer switch for the dashboard lights. all efforts have failed so far(reillys, advanced, auto zone, bennets, napa, chevrolet dealers, even gmpartsnow). vehicle is my 2001 L100 saturn sedan. the wheel type switch is under the left side ac vent . switch is to the right of the trunk release button. told the part is no longer available or discontinued. gm part number was 9104893. anybody replaced one of these and has a source for it? thanks tons bob fisher
I need to ask - why are you replacing the rheostat? Is it broken/worn out beyond repair or is it simply causing the IP lights to flicker in an erratic manner?

If all the IP lights are flickering, it is likely due to dirty/erratic contacts within the rheostat. If so, a good electrical contact cleaner will usually solve the issue. My personal favorite for 40+ years has been Caig Labs DeoxIT-D for initial cleaning with a follow up application of DeoxIT Gold for lubrication. My IP lights were flickering several years ago due to an erratic rheostat and the Caig products were the remedy. Only a light application is required.

Caig products used in electrical contact cleaning mean business. They work very well unless serious corrosion, burnouts or wear has set in.

If the rheostat is broken beyond repair and replacement is required, the posts above should assist. Sad that some Saturn parts are slowly becoming NLA.

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Old 08-15-2018, 09:06 AM   #7
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Default Re: L100 instrument light rheostat needed

hi greg and dsaturn for your responses. the one pictured on the autozone website you offered is the correct rheostat switch. but it says not available. yes the dash lights re flickering especially when i turn the little plastic wheel. probably is weak, worn or dirty contacts. have a tube of deoxit and will try it. might just work. do have a further question. this weekend plan to take the panel under the steering wheel off to access the screw which allows the ac vent to come out. that vent duct holds the rheostat and the trunk release button. does the panel simply pry and pull out or is there a trick to it. dont want to wreck it since thats probably made of unobtainium too. diagram in magic book seems to show the rheostat snaps out of the two switch holder. appreciate your guidance . thanks tons bob fisher

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Old 08-15-2018, 09:56 AM   #8
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Default Re: L100 instrument light rheostat needed

Quote:
Originally Posted by rfisher View Post
hi greg and dsaturn for your responses. the one pictured on the autozone website you offered is the correct rheostat switch. but it says not available.r
^^ rfisher, Take another look at the link Dsaturn posted, it shows it is available by ordering on line just not in your local store for pick-up.

Should you want to clean this switch, it is easily removed. Pull down the cover under the steering wheel. (No need to remove) Take out the HVAC vent by removing the one torx screw at the bottom. The switch is released by pressing a couple of tabs on the back of the switch. It slides out from the front.

Let us know how else we can help.

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Old 08-15-2018, 10:03 AM   #9
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Default Re: L100 instrument light rheostat needed

Quote:
Originally Posted by pierrot View Post
^Dsaturn's information is correct. What is striking to me about this is that AutoZone may be the last supplier selling this switch. It can no longer be found through AC Delco's online catalog. The part number was accurate on an OE website, gmpartscenter.net, but was listed as discontinued. RockAuto no longer lists the part (it was there for a very long time).

My assessment of this situation: if anyone is considering acquiring a new dimmer switch then they probably shouldn't waith too long. This switch was not a utilized by GM in North America for any division other than Saturn. There probably aren't all that many left.
Not available in store but is available to ship to home.

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Old 08-15-2018, 10:05 AM   #10
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Default Re: L100 instrument light rheostat needed

Quote:
Originally Posted by rfisher View Post
hi greg and dsaturn for your responses. the one pictured on the autozone website you offered is the correct rheostat switch. but it says not available. yes the dash lights re flickering especially when i turn the little plastic wheel. probably is weak, worn or dirty contacts. have a tube of deoxit and will try it. might just work. do have a further question. this weekend plan to take the panel under the steering wheel off to access the screw which allows the ac vent to come out. that vent duct holds the rheostat and the trunk release button. does the panel simply pry and pull out or is there a trick to it. dont want to wreck it since thats probably made of unobtainium too. diagram in magic book seems to show the rheostat snaps out of the two switch holder. appreciate your guidance . thanks tons bob fisher
Mine does the same thing. Flickers when you touch the switch wheel and wont stay on high when you let go of the switch wheel.

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Old 08-15-2018, 11:19 AM   #11
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Default Re: L100 instrument light rheostat needed

A few years after I bought my L300 I saw the same flickering when touching the dimmer knob. It's just a small potentiometer controlling a low voltage signal to the bcm that controls panel lighting. It appears to be a common wear item. My solution after finding the pot was to shim it so it wouldn't move from touching it when fumbling at night for the trunk release button. It seems to work but doesn't help with the flickering when touching the dimmer knob. Since I rarely dim interior panel lights in NYC, periodic exercise seems to help. Annoying sometimes but not worth replacing it. If I know this part is no longer available then I'd locate any markings for resistance value. Dimensions and cross referencing online electronics places for potentiometers should result in a replacement. Bypassing the pot may work too by wiring a bypass to disable the dimming function altogether.

I posted something similar - one of my cooling fans lost medium speed. A resistor burned out. Testing showed the fan working when I bypassed the resistor. No markings anywhere for resistor value and wattage rating. Shopping online revealed the two numbers from a Dorman replacement and off to the online electronics sites to find a replacement for a few dollars. Wired in the resistor and my fan has medium speed again (until the fan wears out altogether).

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Old 08-15-2018, 01:26 PM   #12
rfisher
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Default Re: L100 instrument light rheostat needed

hi rb6667 - thank you for the info . sorry missed that the part was available on line. seems mighty steep price though doesn't it. going to try cleaning and deoxit route first. regards bob fisher

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Old 09-01-2018, 03:54 PM   #13
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Default Re: L100 instrument light rheostat needed

Quote:
Originally Posted by rfisher View Post
thanks floridas- will try that as my last resort. electrical parts are risky from junkyards, but may have no alternative. hoping a sage on this forum has one in his junk pile. regards bob fisher
yes they are no more risky then from parts store. Just look at the connections and worse they are far cheaper then parts store or from eBay if someone is selling them and it most likely is junkyard parts as well. I've gotten plenty of parts there and if you know what your doing then go for it. But as cars age that will be your only choice where you know you can at least find them.

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