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Classic Mustangs Tech Forum

Technical discussions specific to 1964-1967, 1968-1970, and 1971-1973 Classic Mustang. Discuss all tech related to in-line six cylinder and V8 powered Vintage Mustangs here.

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Unread 06-15-2009   #1 (permalink)
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Default 1968 Mustang Gauges Don't Light up or Work

I have a 1968 and my gauges do not light up or read anything. The turn signal displays do flash and the Mustang in the center of the cluster lights up when I turn the brights on, but other than that nothing works. I checked the bulbs and that is not the problem. Does anyone have any ideas on what I should look check or look for? Please help!
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Unread 06-16-2009   #2 (permalink)
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Check your fuses in your fuse panels. Perhaps one has blown. Check all the wiring behind the instrument panel to search for exposed wiring, or wiring that's come loose/off.

Be sure to unhook the battery first!
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Unread 06-16-2009   #3 (permalink)
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I checked all the fuses and didn't see any disconnected or loose wires, i read one forum saying maybe the voltage regulator? but if that was bad it seems like my turn signals and high beam dash light would not work correctly either...
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Unread 06-16-2009   #4 (permalink)
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IF it were your voltage regulator, your car's charging system would not work correctly and your car would die as if it's battery were dead.
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Unread 06-16-2009   #5 (permalink)
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hi, dne' here. After you've checked all the simple things for what's wrong, you may have to get a little more extreme in solving diagnostically what's wrong, a test light will be required. On backside of your instrument dash is a Constant Voltage regulator and it does exactly what it says~ maintains constant voltage to your instruments, etc. But I'm not sure if it works for the instrument lights.~ I'm ordering a new upgraded one for my '67 which controls the voltage to the system electronically thus no fluctuating needles,but I already have my instrument dash out and so it will be easy for me. I found my part on the net, The Paddock, 800-428-4319. However, I would check to see if all wires are conneted behind your instrument dash/cluster, and especially that your instrument dash is grounded, it could be that easy! Look for the simplest solution first!
dne'
Update: just called the place to order, said they no longer were in stock

Last edited by dne'; 06-16-2009 at 06:01 PM. Reason: update
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Unread 06-16-2009   #6 (permalink)
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Default good reading

Instrument Panel Function Electrical Basics - Mustang & Fords Magazine
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