Instrument light flashing?
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Instrument light flashing?
Problem:
My instrument / dash lights flash on every 3 seconds, very VERY consistently every 3 seconds. The reason I am stressing the consistent part is that every time I search for this problem I get threads about the bad solder on the instrument circuit panel. A bad solder would not flash every 3 seconds so consistently!
When the instrument / dash light flash on, it is only for a split second, so very quickly on then right back off. When this happens, my odometer readout dims and almost blanks. I have a voltmeter and when I hooked it up I noticed the volts in the truck drop from about 14 to around 12.5, but again the "pulse" is very quick and hard to read.
The tail lights work and I have no blown fuses, so it is really just the instrument / dash lights that are having this problem.
I also noticed that with the key off and lights on, the "lights are left on" chime only chimes once every 3 seconds... shouldnt it be about 2-3 times per second? It seems to be a very slow chime for "lights left on" warning. Could this be related?
Any suggestions? This one has me completely stumped for the past three weekends of diagnostic work...
My instrument / dash lights flash on every 3 seconds, very VERY consistently every 3 seconds. The reason I am stressing the consistent part is that every time I search for this problem I get threads about the bad solder on the instrument circuit panel. A bad solder would not flash every 3 seconds so consistently!
When the instrument / dash light flash on, it is only for a split second, so very quickly on then right back off. When this happens, my odometer readout dims and almost blanks. I have a voltmeter and when I hooked it up I noticed the volts in the truck drop from about 14 to around 12.5, but again the "pulse" is very quick and hard to read.
The tail lights work and I have no blown fuses, so it is really just the instrument / dash lights that are having this problem.
I also noticed that with the key off and lights on, the "lights are left on" chime only chimes once every 3 seconds... shouldnt it be about 2-3 times per second? It seems to be a very slow chime for "lights left on" warning. Could this be related?
Any suggestions? This one has me completely stumped for the past three weekends of diagnostic work...
Could you provide more information about your vehicle, year, model etc. ?
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radical_reabster
1973 - 1979 F-100 & Larger F-Series Trucks
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Jul 17, 2017 11:21 PM
