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Topics - CamaroJeff

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Originality / Factory wiring for rear window defogger
« on: April 26, 2023, 11:44:21 PM »
Hello,

I recently purchased a rear window defogger for my 69 Camaro. I want to keep the wiring as close to original as possible. My question… would the factory have these connections bundled into the main dash trunk etc harnesses? Or would they have used what I’ll call an accessory harness like you would buy from American auto wire and others.

There are even some GM new old stock harness that resemble the American auto wire stuff.  They plug into the dash switch, and a 12 volt accessory port on the fuses block to make it work. Did the factory do our cars this way?

On my car there are a number of empty pin positions In the factory dash harness where it splits off towards the rear of the car, just behind the headlight switch.  Makes me think these pins would have been utilized for an instance like mine.


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Maintenance / Amp Meter Resistance, my gauge moves very little
« on: January 02, 2023, 07:12:23 PM »
I retrofitted my 69 Camaro with factory console gauges about 10 years ago. The amp meter never moves more than the width of the needle in either direction but does respond as you’d expect when lights are cut on etc. After rechecking my wiring, everything appears correct.

Can someone tell me the resistance the gauge should measure across the black and black/white terminals? I don’t believe this gauge uses a ground, but please let me know if I am mistaken.

Neither terminal on my gauge shows a connection to ground and the resistance between them is 0.6 ohms. When running, I have about O.150v between the horn relay splice in the harness and junction block when drawing 15A from the battery (high beams, dome light etc.). At the gauge I only see 0.015V during these same conditions.

I don have a EE degree but it’s been 10 years since I cracked a book, so tell me if I’m being an idiot  :)

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