67 duetto cigarette lighter and ash tray wiring - Alfa Romeo Bulletin Board & Forums
 
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post #1 of 4 (permalink) Old 08-12-2019, 07:36 PM Thread Starter
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67 duetto cigarette lighter and ash tray wiring

Checking my non-operable cigarette lighter and ash tray light trying to restore function. First thing I discovered....there are two wires (red/white) that were not connected. I tested them for power and they have 12.5v After a lot of cleaning of the lighter...alas it seems dead. The return spring is totally shot and when applying 12V to the heater coil...nothing.

A few other confusing things. The center post to the ash tray light bulb is spring loaded, and appears to be electrically connected to a male spade connector on the back side of the bulb bracket. When I check for continuity between the spade terminal and the post the center bulb contact touches....there is no continuity. Applying 12v to the male spade terminal and grounding the outside of the bulb housing...no light on a known good bulb. How does this bulb get power?

Lastly I see only the two wires in plain view (red/white) they have constant power....which seems fine for the cigarette lighter....but would make the ash tray light stay on constantly. Are there any additional wires I should be looking for? I'm a new owner of this car and currently have not found wiring diagrams. If someone could point me to a source, or email a set to [email protected] I would be grateful.

1967 Duetto just like the one I had in college....a long time ago.
1965 Mustang fastback, dart 427 with Weber 8-stack, 5sp
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post #2 of 4 (permalink) Old 08-13-2019, 08:52 AM
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Wire diagram is in the instruction book. Click the link below and download one of the books.

Instruction books

Brian __________________________________
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post #3 of 4 (permalink) Old 08-13-2019, 05:00 PM Thread Starter
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Thank you for the link. I was able to download the diagram and begin to see what is going on. I was able to get 12.5v across the red and white wires with the key off. I'm not totally sure how this works as the red wire is constant 12V always, and the white wire is 12V when the parking lights are turned on. Somehow when the key is off there is continuity to ground.

I should be able to get everything working...once I source a replacement cigarette lighter.

Thanks again...on to the next item..

1967 Duetto just like the one I had in college....a long time ago.
1965 Mustang fastback, dart 427 with Weber 8-stack, 5sp
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post #4 of 4 (permalink) Old 08-13-2019, 06:28 PM
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Replacement lighters will cost a fortune as they are shared by other marques. I would bet the heating element is fried.

Brian __________________________________
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