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#1 |
Senior Member
![]() Join Date: Sep 2001
Location: Seattle, WA, USA
Posts: 5,817
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Question about lights in speedometer
Sorry...not the speedometer. The gas gage.
I finally got what I think are ALL of the lights finally working in my instrument cluster. So this may seem silly to a lot of you, but it's actually cool to finally get about 90% of the electrical systems working - especially under the dash after owning the truck for 7 years without a radio or decent heater controls. I've also been driving around with half of the bulbs burnt out in the instrument cluster. Anyway my question: there's two lights in the gas gage. The one on the left says "brake" and comes on when I turn the key, but goes off immediately after the truck starts and I let the key go. The other....I don't know. It doesn't light up - ever. What's the light on the right, and when should it come on? When should these lights come on and stay on? I don't have an owner's manual so I'm obviously trying to figure out what these lights are supposed to mean...
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'69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA. Last edited by COBALT; 01-18-2008 at 04:19 PM. |
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#2 |
Registered User
Join Date: Apr 2007
Location: antreville, south carolina
Posts: 873
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Re: Question about lights in speedometer
if its the cluster with only three hole cluster that would be the generator light and if my memory serves me from what mine used to do when i still had the stock gauges it lights up just like the other and only goes on driving if you have a battery problem or the altenator is on the fritz
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"Dixie Destroyer" 71 C10 LWB Fleet Future Blown Prostreet Monster |
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#3 |
Senior Member
![]() Join Date: Sep 2001
Location: Seattle, WA, USA
Posts: 5,817
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Re: Question about lights in speedometer
It's not a 3-hole. The center is empty.
Speedometer on left. Empty center. Gas gage on right Below is Amps, temp, empty and oil pressure in that order.
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'69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA. |
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#4 |
Registered User
Join Date: Jan 2008
Location: SURREY BC, CANADA
Posts: 278
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Re: Question about lights in speedometer
mine has a brake and overheat in the gas guage at the bottom
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#5 | ||||
Union Electrician
Join Date: Feb 2005
Location: Louisville, Ky.
Posts: 3,356
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Re: Question about lights in speedometer
Quote:
The two red lights in the bottom of ALL 1/2 fuel gauges is brake/temp in the bigger trucks they say tandem axle/overspeed
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#6 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Question about lights in speedometer
And to add to what Randy just said, there isn't even supposed tpo be a bulb in it in a 7 hole panel.
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#7 |
The Older Generation
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Location: Montezuma, Iowa
Posts: 25,513
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Re: Question about lights in speedometer
-
Don't some of them have a light for the emergency brake?? LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#8 |
Hittin E-Z Street on Mud Tires
![]() Join Date: Nov 2004
Location: Greenville, SC
Posts: 23,090
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Re: Question about lights in speedometer
Didn't drive the truck today, but I'm pretty sure one is brake, the other is temp. My temp one won't work because I never reinstalled the sender thingy when I swapped from the 6 to V8, I have an actual gauge for it now. My brake one actually works. I blew the MS a couple years ago and the light came on.
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#9 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Question about lights in speedometer
Not for parking brake, no. Just for hyd problems in the brakes.
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#10 |
Senior Member
![]() Join Date: Sep 2001
Location: Seattle, WA, USA
Posts: 5,817
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Re: Question about lights in speedometer
So if I loose pressure as the master cyl. then the left one should stay on. If my engine gets above a specific temp the right one should stay on?
Only the brake light comes on temporarily when I start the truck.
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'69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA. |
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#11 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Question about lights in speedometer
if you have a temp guage, then the temp light isn't even supoposed to have a bulb in it.
One part number for two aplications reduces overhead costs. |
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#12 | |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,513
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Re: Question about lights in speedometer
Quote:
LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#13 |
Senior Member
![]() Join Date: Sep 2001
Location: Seattle, WA, USA
Posts: 5,817
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Re: Question about lights in speedometer
Ah...explains why it never comes on. I have a temp gage, and it actually works - assuming the wire doesn't come loose and fall against my manifold.
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'69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA. |
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