83 Spider diagram? - Alfa Romeo Bulletin Board & Forums

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post #1 of 4 (permalink) Old 02-08-2006, 08:04 PM Thread Starter
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83 Spider diagram?

I tried posting this on the Spider forum, but received no responses. I'm trying to figure out which wires go to which terminal on the back of my heater blower switch. Click here for photos: Heater switch wiring - 83 Spider

Can someone help me, please!!??!!
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post #2 of 4 (permalink) Old 02-08-2006, 09:20 PM
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Do you have the repair manual with the wire diagram in it? The one I have shows three terminals used on the switch itself.

Pink (hot) -- to the heater door switch
Yellow/black -- to the heater motor
Yellow -- to the heater motor

The diagram shows:

Pink to terminal 3
Yellow/black to terminal 4
Yellow to terminal 1

You'll want to do a continuity test with a ohmmeter to verify on the switch that those connections makes sense. I don't have a whole lot of confidence I know how to read Alfa's wire diagrams for S3 cars.

John Stewart
74 Spider
91 164S
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post #3 of 4 (permalink) Old 02-09-2006, 04:33 AM Thread Starter
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Thanks very much. I'll give it a try, but I have three extra wires (???) I think the 83 must be wired a bit differently. At least I have something to test now!

I appreciate your help.

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post #4 of 4 (permalink) Old 02-09-2006, 06:58 AM Thread Starter
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Hmm. I don't have a terminal 3. That spot on my switch doesn't have a post!
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