[DeTomaso] Not Starting-Check Battery

[jgkrenton at comcast.net]

Thomas, David et-al: 

The alternator indicator light on a stock wired Pantera is also part of the "Voltage Sense" circuit that helps the alternator start when the engine is started. If the bulb burns out the sense line doesn't work and the alternator may or may not start depending on the characteristics of that particular alternator. (You may have seen alternators that wouldn't start until the engine was rev'd a bit. Some won't start at all without a sense line connected.) 

The DeTomaso factory included a big ceramic resistor (something like 10 ohms or something, I need to check the schematic) across the light bulb. This resistor is there to ensure the alternator gets a strong start signal and will still start if the bulb fails. Of course if the wire breaks, there is still an issue. 

I suspect many of these resistors have disappeared over the years. If you are having problems with an alternator that doesn't want to start charging, you might want to ensure the resistor is installed and functioning. 

FYI 

Jeff 2467 

----- Original Message -----

From: "Thomas Törnblom" <tipo874 at gmail.com> 
To: "David Jenkins" <djenkins at vanguardtrailer.com> 
Cc: detomaso at server.detomasolist.com 
Sent: Monday, July 24, 2017 12:04:02 PM 
Subject: Re: [DeTomaso] Not Starting-Check Battery 

It can also be the bulb, or the wire from the bulb to the alternator/regulator. The wire broke for me in flight in Germany many years ago and as long as the alternator was spinning it was ok. The morning after it would not start charging. After crimping on a new connector it was ok again. 

Thomas 

> 24 juli 2017 kl. 15:44 skrev David Jenkins <djenkins at vanguardtrailer.com>: 
> 
> [cid:image001.gif at 01D3045F.FE026390] 
> 
> 
> Most of the Pantera owners on this site probably know this but I am 
> only modestly mechanically inclined. I went to start and instead had a 
> loud clicking noise. My first thought was a bad starter relay but I had 
> enough sense to check the battery which tested at 11.4V. The parts 
> store manager told me the battery usually needs to be fully charged for 
> the relay to engaged. Turns out he was right. I charged the battery and 
> it started fine. Since my generator light was not coming on I now 
> assume I need a new voltage regulator. 
> 
> 
> 
> DJ 
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> 
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-------------- next part --------------
   Thomas, David et-al:
   The alternator indicator light on a stock wired Pantera is also part of
   the "Voltage Sense" circuit that helps the alternator start when the
   engine is started.  If the bulb burns out the sense line doesn't work
   and the alternator may or may not start depending on the
   characteristics of that particular alternator.  (You may have seen
   alternators that wouldn't start until the engine was rev'd a bit. Some
   won't start at all without a sense line connected.)
   The DeTomaso factory included a big ceramic resistor (something like 10
   ohms or something, I need to check the schematic) across the light
   bulb.  This resistor is there to ensure the alternator gets a strong
   start signal and will still start if the bulb fails. Of course if the
   wire breaks, there is still an issue.
   I suspect many of these resistors have disappeared over the years. If
   you are having problems with an alternator that doesn't want to start
   charging, you might want to ensure the resistor is installed and
   functioning.
   FYI
   Jeff 2467
     __________________________________________________________________

   From: "Thomas TAP:rnblom" <tipo874 at gmail.com>
   To: "David Jenkins" <djenkins at vanguardtrailer.com>
   Cc: detomaso at server.detomasolist.com
   Sent: Monday, July 24, 2017 12:04:02 PM
   Subject: Re: [DeTomaso] Not Starting-Check Battery
   It can also be the bulb, or the wire from the bulb to the
   alternator/regulator. The wire broke for me in flight in Germany many
   years ago and as long as the alternator was spinning it was ok. The
   morning after it would not start charging. After crimping on a new
   connector it was ok again.
   Thomas
   > 24 juli 2017 kl. 15:44 skrev David Jenkins
   <djenkins at vanguardtrailer.com>:
   >
   >    [cid:image001.gif at 01D3045F.FE026390]
   >
   >
   >   Most of the Pantera owners on this site probably know this but I am
   >   only modestly mechanically inclined. I went to start and instead
   had a
   >   loud clicking noise. My first thought was a bad starter relay but I
   had
   >   enough sense to check the battery which tested at 11.4V. The parts
   >   store manager told me the battery usually needs to be fully charged
   for
   >   the relay to engaged. Turns out he was right. I charged the battery
   and
   >   it started fine. Since my generator light was not coming on I now
   >   assume I need a new voltage regulator.
   >
   >
   >
   >   DJ
   > _______________________________________________
   >
   >
   > Detomaso Email List is not managed by POCA
   > Posted emails must not exceed 1.5 Megabytes
   > DeTomaso mailing list
   > DeTomaso at server.detomasolist.com
   > http://server.detomasolist.com/mailman/listinfo/detomaso
   >
   > To manage your subscription (change email address, unsubscribe, etc.)
   use the links above.
   >
   > Members who post to this list grant license to the list to forward
   any message posted here to all past, current, or future members of the
   list. They also grant the list owner permission to maintain an archive
   or approve the archiving of list messages.
   _______________________________________________
   Detomaso Email List is not managed by POCA
   Posted emails must not exceed 1.5 Megabytes
   DeTomaso mailing list
   DeTomaso at server.detomasolist.com
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   To manage your subscription (change email address, unsubscribe, etc.)
   use the links above.
   Members who post to this list grant license to the list to forward any
   message posted here to all past, current, or future members of the
   list. They also grant the list owner permission to maintain an archive
   or approve the archiving of list messages.