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Fixing the old truck

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49 and 51 3100 #1287581 11/15/2018 10:43 PM
Joined: Jan 2017 Posts: 309 EL PRADO NM 5 51 5 Window 3100 'Bolter
51 5 Window 3100 'Bolter 5 Joined: Jan 2017 Posts: 309 EL PRADO NM	Both are 12 volt--should the 49 have a dimmer switch for the 2 gauge clusters, like the 51? Don't know if dimmer was standard in 1949. Thanks for your excellent assistance..Bill Last edited by 49 3100; 11/16/2018 12:18 AM.

Re: 49 and 51 3100 51 5 Window 3100 #1287597 11/15/2018 11:58 PM
Joined: Mar 2014 Posts: 154 Bellevue, WA G Greg Brown 'Bolter
Greg Brown 'Bolter G Joined: Mar 2014 Posts: 154 Bellevue, WA	My 49 has a floor mounted dimmer Greg Brown

Re: 49 and 51 3100 Greg Brown #1287599 11/16/2018 12:26 AM
Joined: Mar 2014 Posts: 154 Bellevue, WA G Greg Brown 'Bolter
Greg Brown 'Bolter G Joined: Mar 2014 Posts: 154 Bellevue, WA	Just re-read your post. Are you actually talking about the ability to dim the gauge lights? My light switch appears like it might turn to adjust the gauge lights, but it doesn't work very well. I have to fiddle with it to just get the gauge lights on sometimes. I'm guessing after 70 years the rheostat is a little worn out. Greg Brown

Re: 49 and 51 3100 51 5 Window 3100 #1287630 11/16/2018 2:44 AM
Joined: Sep 2001 Posts: 29,262 Jarvisburg, NC, USA tclederman Bubba - Curmudgeon
tclederman Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,262 Jarvisburg, NC, USA	The rheostat gets corroded/oxidized. There is a spay fluid available that rejuvenates the rheostat contact surfaces. Radio Shack used to sell a product. Maybe someone will post info on a readily available cleaner? Tim 1954Advance-Design.com 1954 3106 Carryall Suburban 1954 3104 5-window pickup w/Hydra-Matic The 216 and early 235 engines are not "splash oilers" -- this is a splash oiler.

Re: 49 and 51 3100 Greg Brown #1287651 11/16/2018 4:46 AM
Joined: Jun 2011 Posts: 5,096 Longmont, CO E EdPruss Crusing in the Passing Lane
EdPruss Crusing in the Passing Lane E Joined: Jun 2011 Posts: 5,096 Longmont, CO	70 years and a little salt air. Ed '37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires. '47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle. '54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed. '55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.

Re: 49 and 51 3100 tclederman #1287721 11/16/2018 6:30 PM
Joined: Jan 2017 Posts: 309 EL PRADO NM 5 51 5 Window 3100 'Bolter
51 5 Window 3100 'Bolter 5 Joined: Jan 2017 Posts: 309 EL PRADO NM	Found CRC QD electronic cleaner and another made by Permatex. Would one have to remove the switch to spray, or reach under the dash?.Thanks BIll

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