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Follow up on 'Cold weather voltage stabilizer problems' 200

uid 2796's pic
posted by  bulletproof on  Fri Jan 16 04:24 CST 2004
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last visit: Fri Oct 24 12:02 CST 2014
[RELATED]

So, Art, if you're reading this, first I should note that, contrary to what I said on Monday, the voltage stabilizer in my '80 and the spare I had from my '79 are not exactly like the one in the picture. Similar, though.
I replaced the suspect item with the spare and proceeded to try and dissect it. But without drilling out a rivet I could only peek inside. There's not much in there and I don't know the proper terminology to describe it but there are three leads from the circuit board which is the back of the unit that connect to some sort of small component inside the box. Protruding from the other side of the small component is springy piece of metal which is fastened to the shell by the aforementioned rivet. Not much to fix unless one of the leads were broken. So I didn't mess with it any further.
The gauges are still reading lower than I think they should using the other stabilizer. Could this mean that they're getting less than 10V or whatever is normal?
--
'80 DL 2 dr








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    Follow up on 'Cold weather voltage stabilizer problems' 200

    uid 27's pic
    posted by  Art Benstein on  Fri Jan 16 06:53 CST 2004
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    last visit: Fri Oct 17 20:10 CST 2014
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    I thought the two I had were identical too, but one is like yours and the other, without dissection, looks like it has the heated bimetal in it. Pretty tough to get in there and measure the voltage, but you might could check it by temporarily pulling the wire off of the temp sender and measuring it on that (yellow?) wire. When you do, just note whether that action causes the fuel gauge to rise; it shouldn't.
    --
    Art Benstein near Baltimore








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      Follow up on 'Cold weather voltage stabilizer problems' 200

      posted by  someone claiming to be joe on  Fri Jan 16 08:36 CST 2004 [RELATED]

      A +10V regulator rated 1.5A should replace the old style voltage
      stabilizer. I made a replacement for my '78 using an adjustable
      regulator from Radio Shack. It took several resistors and a pot.
      to get the regulator adjusted to +10, so this is not a very good way
      go. The fixed +10 regulators are available, but not from the Shack.








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    Follow up on 'Cold weather voltage stabilizer problems' 200

    posted by  runwld2 on  Fri Jan 16 06:36 CST 2004
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    last visit: Tue Sep 30 13:11 CST 2014
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    I would guess the voltage regulator output is less than 10 volts for the gauges. From a design point of view it wold be best if the regulated voltage is much less than any voltage the overal system would fall to.
    --
    744-16v,745-16v,242Turbo.245DLT








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      Follow up on 'Cold weather voltage stabilizer problems' 200

      uid 27's pic
      posted by  Art Benstein on  Fri Jan 16 06:48 CST 2004
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      last visit: Fri Oct 17 20:10 CST 2014
      [RELATED]

      Somewhere I think I'd seen 10V quoted as the output. I hear you about design; a "low dropout" regulator is the result of just those concerns, but I really have no experience whatever with the ones in the instrument panel. In my junkbox I believe I have the same one bulletproof has; I'd say it has a solid state three terminal regulator inside with the rivet and spring steel making up the heat sink connection with the housing can. Nothing worthwhile to fix there unless you were bent on retrofitting a new part from the later models. But I could check to see how low I can go on the input side...
      --
      Art Benstein near Baltimore







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