| Dash gauges [message #302551] |
Wed, 22 June 2016 23:54  |
homer
Messages: 73
Registered: April 2011
Location: arizona/ BC canada
Karma: 0
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Looking for advice and help to change out the old speed-o gauge and the matching temp/fuel/oil Gauge,from black to white getting a little hard to see, best places to look for replacements of size and wiring to make hook a little easier.looking forward to the change.my bus 1973 Sequoia, Homer
homer
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| Re: [GMCnet] Dash gauges [message #302562 is a reply to message #302551] |
Thu, 23 June 2016 08:38  |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Custom Instruments in North Carolina.
On Wed, Jun 22, 2016 at 9:54 PM, les holmes wrote:
> Looking for advice and help to change out the old speed-o gauge and the
> matching temp/fuel/oil Gauge,from black to white getting a little hard to
> see,
> best places to look for replacements of size and wiring to make hook a
> little easier.looking forward to the change.my bus 1973 Sequoia, Homer
> --
> homer
>
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--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: Dash gauges [message #302747 is a reply to message #302551] |
Tue, 28 June 2016 07:41 |
quadracerx1
Messages: 207
Registered: April 2013
Location: Puyallup, Washington
Karma: 1
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Senior Member |
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Hi...
Does anyone have the hole sixe of the factory gauges? In case I want to replace my stock gauges with aftermarket?
Also I want to switch to LED dash lights if I keep my stock gauges. I already have the bulbs, do I need to do anything special with the wiring or just plug them in?
Anyone have a diagram or drawing of how many bulbs are needed and where they are located?
Thanks,
Steve
75 26' GMC Glenbrook
Puyallup, Washington
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| Re: Dash gauges [message #302761 is a reply to message #302747] |
Tue, 28 June 2016 12:33 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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You cannot "just plug in" LEDs. Polarity and voltage sensitive. Most LEDs are about 1.2 volts DC at various current levels, depending upon light output. Heavy current draw LEDs require heat sinks to control their temperature. Too hot and they burn up very quickly. Are you meaning to replace the lights that are in the telltale panel and the instruments? Or, are you trying to replace behind the labels over the various controls?
two different approaches are needed.
Typical 12v LEDs (lower output) consists of a string of 3 LEDs and a dropping resistor to control current. Take a close look at some of the strip LED lighting arrays and you will see what I mean. Higher output LEDs require a current limiter and heat sinks. For an instrument light, you do not have to worry about the high output LEDs. I have not seen LED lights for sale that are configured like the instrument panel lights. They may exist, but I am unaware of them.
The labels initially had a fiber optic ribbon to carry light to them for illumination. Most of these ribbons had fallen apart. Have never seen an intact ribbon. There is an electroluminescent kit available to light the labels. http://www.appliedgmc.com/prod.itml/icOid/500 Or, you can roll your own.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: Dash gauges [message #302793 is a reply to message #302792] |
Tue, 28 June 2016 18:03 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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The physical configuration of those LEDs does not match the configuration that is used on my dash. It is a 1975 GMC. They may work in place of the listed types. They would work as a replacement type because that bulb base actually has a positive and negative point.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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