Author Topic: C3 Electronic Alarm Module.  (Read 1631 times)

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Offline Vettech

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C3 Electronic Alarm Module.
« on: March 03, 2019, 05:11:08 PM »
The following is for mug lair persons with purple C3's.

1st - Sorry for a bum steer, the little plastic box plugs directly into main fuse pnl.

Hopefully see below for pic off my build book
Vettech.

Offline Vettech

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Re: C3 Electronic Alarm Module.
« Reply #1 on: March 03, 2019, 05:16:07 PM »
Shot of Fuse Pnl Asm

Those single sockets read top to  bot  ? , Bat,  Ign, Accesory.

Whilst the bottom left -"Lps" (lamps).
Vettech.

Offline Vettech

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Re: C3 Electronic Alarm Module.
« Reply #2 on: March 03, 2019, 05:40:04 PM »
Shot of Instrument wiring with the module shown, cant see flying lead, but has a plug.
Vettech.

Offline Vettech

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Re: C3 Electronic Alarm Module.
« Reply #3 on: March 03, 2019, 05:52:09 PM »
 Now I have some virus on this Ipad - its taken 5-6mins to type this line.

Check the 1 and 2 pin plugs are connected. :grr: :grr:
Vettech.

Offline Vettech

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Re: C3 Electronic Alarm Module.
« Reply #4 on: March 03, 2019, 06:29:26 PM »
These last 2 are out off  a Chev service manual.
But the cct dia clearly shows the lite is driven by the magic box.
At 30++ years I'm sure some bits have given up the ghost.

Electrolitic Capacitors are the 1st to go, but replaceable. Any luck they have gone O/Cct. (They can explode or ooze - either one can be BAD)

Best unplug unit at 1st opportunity, either have a look yourself, or let me know, as you know I have a very rigid, tight and full itinery, but I'm sure I could fit it in somehow.

Regards.        P.S tap on pic to expand, then U can move, enlarge etc to read.
Uncle Doug.
Vettech.

Offline sirfixalot

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Re: C3 Electronic Alarm Module.
« Reply #5 on: March 05, 2019, 08:42:25 PM »
I have a spare here if you want one to play with

Offline Vettech

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Re: C3 Electronic Alarm Module.
« Reply #6 on: March 08, 2019, 04:52:22 PM »
Sirfixalot, hang on to it for now,  the PURPLE People Eater has not replied as yet.
Vettech.

Offline YesItsPurple

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Re: C3 Electronic Alarm Module.
« Reply #7 on: March 10, 2019, 10:34:12 AM »
Well thanks Uncle Doug.
Will look into it this week.
Thanks

Offline Vettech

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Re: C3 Electronic Alarm Module.
« Reply #8 on: March 10, 2019, 02:09:48 PM »
been looking for an internals pic.

see attached pic. looks like one 14dip chip - possibly a 555. or a driver with "AND" Gates as inputs.
the ony cap looks like a polyester, thats good, bunch of resisters , diode or two, easy peasy..

Archaic design, notice the "U" shaped metal piece, this is bi-metalic strip achored at one end, then coil of wire heats it up, bends, looses contact, cools, returns to normal, makes contact, heats up and so on...

Any onee with an actual cct diagramm for this device - it would be appreciated... Sorry I cant get the pic on as its too big.
Vettech.