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 Post subject: General Motors integrated circuit cross-reference?
PostPosted: Oct Mon 19, 2020 2:20 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 1247
Location: Earth
Does anyone have some reference on “proprietary” integrated circuits used in lighting control modules?

I’ve got two twilight sentinel control boxes. One from 1983 and the other one from 1991.

One is plastic DIP IC with 8 legs. “6385” or maybe “G385”.

The other is a plastic DIP IC with 16 legs. “2271”.

No other writing other then the date codes that jive with the other parts and build date of the modules.

I’m sure they are probably just a relabeled op-amp or comparator, but info would save me a lot of reverse engineering time.

These were supplied by GM’s “Guide” division (later Fisher-Guide) and installed to make the headlamps come on automatically at dusk and off at dawn.

Thanks for any leads.


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 Post subject: Re: General Motors integrated circuit cross-reference?
PostPosted: Oct Thu 22, 2020 7:05 pm 
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Joined: Aug Tue 25, 2020 1:49 am
Posts: 37
Location: Forest Hill, MD, USA
Please send pictures. Sometimes it's helpful to see the printing or chip makers logo. Not quite vintage radio.


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 Post subject: Re: General Motors integrated circuit cross-reference?
PostPosted: Oct Thu 29, 2020 2:26 pm 
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Joined: Aug Tue 29, 2006 4:09 am
Posts: 115
Location: Racine, Wisconsin
I retired from Delco Electronics 13 years ago. Most of the parts from that era began with 1600, 1601, etc. Only the last 4 digits were usually printed on the IC's. (466 is the EIA code.) You might try searching using the full eight digits. Hope this helps.....Kurt


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