Low steady voltage flickering to "INST" fuse? 69 GTX...
#1890985
08/13/15 01:39 PM
08/13/15 01:39 PM
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Joined: Jan 2003
Posts: 3,129 Somewhere near Palm Springs
ConvertiBee
OP
master
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OP
master
Joined: Jan 2003
Posts: 3,129
Somewhere near Palm Springs
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I'm replacing the factory AM radio in my 69 GTX with one of those repro AM/FM thumbwheel units. There are apparently 2 voltage leads going to the radio, same for old and new. One is for when the ign. switch is on to run the radio, the other one supplies power to light the dial only when the lights are on. My dash lights have never worked, and checking at the fuseblock I get a very low steady flickering from 0-to-2 volts at the "INST" fuse. This is measured from the supply side with the fuse removed. SO... where's my voltage? I tried to trace this orange feeder lead out via the service manual, but it just says "To Body Plug". Any ideas?
Last edited by ConvertiBee; 08/13/15 01:43 PM.
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Re: Low steady voltage flickering to "INST" fuse? 69 GTX...
[Re: ConvertiBee]
#1890990
08/13/15 01:47 PM
08/13/15 01:47 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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with it (dash lights etc) only being lit up when you pull the headlight switch on I would assume that power for that circuit originates there. I'd pull the HL bakelite connector & check the terminal at that end & first I'd confirm the crimped connector on the back of the fuse box for that inst terminal/wire has good continuity.
live every 24 hour block of time like it's your last day on earth
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Re: Low steady voltage flickering to "INST" fuse? 69 GTX...
[Re: ConvertiBee]
#1891098
08/13/15 04:43 PM
08/13/15 04:43 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Thanks guys. Stump: I am seeing the same 0-2v flickering out of the 2nd lead supplied to the radio... That lead would be for the light in the radio, to dim it with the dash lights.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Low steady voltage flickering to "INST" fuse? 69 GTX...
[Re: Supercuda]
#1891187
08/13/15 06:43 PM
08/13/15 06:43 PM
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Joined: Jan 2003
Posts: 3,129 Somewhere near Palm Springs
ConvertiBee
OP
master
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OP
master
Joined: Jan 2003
Posts: 3,129
Somewhere near Palm Springs
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Thanks guys. Stump: I am seeing the same 0-2v flickering out of the 2nd lead supplied to the radio... That lead would be for the light in the radio, to dim it with the dash lights. EXACTLY, Super, and I'm trying to figure out how to get it the voltage it needs. So far, adjusting the dimmer switch has no effect at all on that lead. It should!
Last edited by ConvertiBee; 08/13/15 06:44 PM.
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Re: Low steady voltage flickering to "INST" fuse? 69 GTX...
[Re: stumpy]
#1891208
08/13/15 07:22 PM
08/13/15 07:22 PM
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Joined: Jan 2003
Posts: 3,129 Somewhere near Palm Springs
ConvertiBee
OP
master
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OP
master
Joined: Jan 2003
Posts: 3,129
Somewhere near Palm Springs
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Stump: Again, you guys have not let me down. I gotta get out there and check this out again... right now it is (seriously!) 105 degrees out here... and even hotter in that metal box I call my "shop"... and still hotter in the next few days Just think of the hot box in Cool Hand Luke. I can jumper right over from a nearby 12v fuse onto that lights feed.
Last edited by ConvertiBee; 08/13/15 07:31 PM.
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