[DeTomaso] Speedometer Lights and A/C electrics
Tom Shinrock
tmshinro at aol.com
Thu Dec 18 11:01:10 EST 2014
When I first got my car 28 years ago, I wired the Fasten Seat Belt light that is right above the A/C switch so that it illuminated when the A/C was on. The seatbelt light was nonfunctional when I got the car and I had no intentions on fixing it. Unfortunately, my A/C had a leaky compressor and after a couple attempts to replace the R-12 (for naught) I gave up. This was when you could get cans of R-12 for a $1 at K-Mart. I was young and really didn't care about A/C that much so I just drove with the windows down.
Over the years I disconnected the seatbelt light from the A/C switch. When I went full bore into fixing the A/C three years ago I thought about reconnecting the light but I figured I didn't need it because it was pretty easy to tell when the compressor was on because you could hear the condenser fan and see the draw on the amp gage at idle.
Tom
5186
-----Original Message-----
From: Stephen <steve at snclocks.com>
To: detomaso <detomaso at poca.com>
Sent: Thu, Dec 18, 2014 9:18 am
Subject: Re: [DeTomaso] Speedometer Lights and A/C electrics
Once again - thanks guys for the quick response. It sounds like
perhaps on the early cars the "Fan" light might have been tied to the
radiator fans. Not a bad idea. But, in looking at wiring diagrams it
is apparent that the a/c compressor can be turned on without having the
heater fan running. Seems sort of odd. Two thoughts - one is to add
a light to the speedo so the unused idiot light tells when the
compressor clutch is energized, the second is to change wiring a bit so
that the a/c clutch can only be energized when the heater fan is turned
on. I am assuming others have already done this. I was thinking I
might add a relay to help protect the fan switch, but it is already
coping with the fan motor - a lot bigger draw than the two relays for
the a/c fan and the radiator fan that comes on with the clutch.
Stephen Nelson
[1]SNClocks.com
Click here to join one of our mailing lists [2]Contact Lists
Click here for our new [3]Hammered Dulcimers galleries
Click here for [4]my new blog on finding happiness in retirement
From: SOBill at aol.com [mailto:SOBill at aol.com]
Sent: Wednesday, December 17, 2014 10:55 PM
To: steve at snclocks.com; detomaso at poca.com
Subject: Re: [DeTomaso] Speedometer Lights
On my '74 (#6338) the speedo lamps are labeled (left to right): Fan,
Heater, Gen
The Fan position has no connection and is unused.
The Heater position indicates the Heater/AC Blower Motor is ON.
The Gen position lights when the alternator is not charging the
battery.
The main thing is to keep the main thing the main thing.
Do the best you can with what your have where you are.
Have fun today!
SOBill
In a message dated 12/17/2014 7:34:41 P.M. Pacific Standard Time,
[5]steve at snclocks.com writes:
I was working under the dash of 5332, comfortably laid out with my
feet on
the firewall, and noted there are three lights to the bottom of the
speedometer dial. They are labeled Heater, Fan and Gen on the
dial. I have
lights in the Gen and the Fan holes, and they work. Is there
supposed to be
an additional light in the Heater hole - looking at wiring diagrams
I get
the idea that the heater light is pretty much the same as the fan
light.
Stephen Nelson
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4. http://www.perfectoldman.com/
5. mailto:steve at snclocks.com
6. mailto:DeTomaso at poca.com
7. http://poca.com/mailman/listinfo/detomaso_poca.com
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-------------- next part --------------
When I first got my car 28 years ago, I wired the Fasten Seat Belt
light that is right above the A/C switch so that it illuminated when
the A/C was on. The seatbelt light was nonfunctional when I got the
car and I had no intentions on fixing it. Unfortunately, my A/C had a
leaky compressor and after a couple attempts to replace the R-12 (for
naught) I gave up. This was when you could get cans of R-12 for a $1
at K-Mart. I was young and really didn't care about A/C that much so I
just drove with the windows down.
Over the years I disconnected the seatbelt light from the A/C switch.
When I went full bore into fixing the A/C three years ago I thought
about reconnecting the light but I figured I didn't need it because it
was pretty easy to tell when the compressor was on because you could
hear the condenser fan and see the draw on the amp gage at idle.
Tom
5186
-----Original Message-----
From: Stephen <steve at snclocks.com>
To: detomaso <detomaso at poca.com>
Sent: Thu, Dec 18, 2014 9:18 am
Subject: Re: [DeTomaso] Speedometer Lights and A/C electrics
Once again - thanks guys for the quick response. It sounds like
perhaps on the early cars the "Fan" light might have been tied to the
radiator fans. Not a bad idea. But, in looking at wiring diagrams it
is apparent that the a/c compressor can be turned on without having the
heater fan running. Seems sort of odd. Two thoughts - one is to add
a light to the speedo so the unused idiot light tells when the
compressor clutch is energized, the second is to change wiring a bit so
that the a/c clutch can only be energized when the heater fan is turned
on. I am assuming others have already done this. I was thinking I
might add a relay to help protect the fan switch, but it is already
coping with the fan motor - a lot bigger draw than the two relays for
the a/c fan and the radiator fan that comes on with the clutch.
Stephen Nelson
[1]SNClocks.com
Click here to join one of our mailing lists [2]Contact Lists
Click here for our new [3]Hammered Dulcimers galleries
Click here for [4]my new blog on finding happiness in retirement
From: SOBill at aol.com [mailto:SOBill at aol.com]
Sent: Wednesday, December 17, 2014 10:55 PM
To: steve at snclocks.com; detomaso at poca.com
Subject: Re: [DeTomaso] Speedometer Lights
On my '74 (#6338) the speedo lamps are labeled (left to right): Fan,
Heater, Gen
The Fan position has no connection and is unused.
The Heater position indicates the Heater/AC Blower Motor is ON.
The Gen position lights when the alternator is not charging the
battery.
The main thing is to keep the main thing the main thing.
Do the best you can with what your have where you are.
Have fun today!
SOBill
In a message dated 12/17/2014 7:34:41 P.M. Pacific Standard Time,
[5]steve at snclocks.com writes:
I was working under the dash of 5332, comfortably laid out with my
feet on
the firewall, and noted there are three lights to the bottom of the
speedometer dial. They are labeled Heater, Fan and Gen on the
dial. I have
lights in the Gen and the Fan holes, and they work. Is there
supposed to be
an additional light in the Heater hole - looking at wiring diagrams
I get
the idea that the heater light is pretty much the same as the fan
light.
Stephen Nelson
_______________________________________________
Detomaso Forum Managed by POCA
DeTomaso mailing list
[6]DeTomaso at poca.com
[7]http://poca.com/mailman/listinfo/detomaso_poca.com
To manage your subscription (change email address, unsubscribe,
etc.) use the links above.
References
1. http://www.snclocks.com/
2. http://fs19.formsite.com/kagforms/form675003155/index.html
3. http://www.snclocks.com/TheRestofourWorld/Hammered-Dulcimers/About-Steves-
Dulcimers/19824807_4sHGgj#1558377542_LKmkrT7
4. http://www.perfectoldman.com/
5. mailto:steve at snclocks.com
6. mailto:DeTomaso at poca.com
7. http://poca.com/mailman/listinfo/detomaso_poca.com
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