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Join Date: Mar 2007
Location: Orland Park, IL.
Posts: 58
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Power Window fuse size
Well, trying to sort out a short in my 76, replaced both switches on the driver side, drivers window still only works intermittently, sometimes have to bang on the door, then all 3 switches went out. Did a search ( great wiring diagrams) and made sure all was correct, it was.
Found a frayed wire that may have caused it, checked the fuse and it was blown. My question is, I pulled a white bullet fuse out of that spot, 16, which I think is only 8 amps and it looks like power windows should be 25 amps according to my book. Is it possible that white fuse was 25 amps? I hate electrical problems, makes me crazy.  Thanks Rich
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76 911S What ever happened to "If it ain't broke don't fix it"?  "I'm not totally useless, I can be used as a BAD EXAMPLE!" 
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08-10-2008, 05:00 PM
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Location: SoFLA
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Color Ampere
yellow 5A white 8A red 16A blue 25A |
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08-10-2008, 05:19 PM
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Location: Orland Park, IL.
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That's what I figured, just don't understand how the windows worked and the fuse didn't blow with an 8amp when it should have 25
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76 911S What ever happened to "If it ain't broke don't fix it"? "I'm not totally useless, I can be used as a BAD EXAMPLE!"
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08-10-2008, 06:49 PM
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Location: SoFLA
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If everything is running smoothly, a smaller fuse won't automatically blow. Problems arise in the reverse, when you put a 25a fuse in an 8a circuit and something causes the circuit to malfunction. Poof...melted wires and/or fire.
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08-10-2008, 07:37 PM
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Join Date: Mar 2004
Location: New Jersey
Posts: 1,861
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They most likely used a 25 amp so you could operate both motors at the same time. If you are chasing an intermittent problem look at the ground connections, especially on the drivers side. If you are having problems with blown fuses look for shorted wires were they enter the doors.
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Peace, Ron www.ronorlando.net 78SC Targa 3.2 SS, 964 cams, CIS, SSI's,Dansk Own a gun and you can rob a bank , own a bank and you can rob the world. Last edited by Mysterytrain; 08-11-2008 at 09:56 AM.. |
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08-11-2008, 06:50 AM
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Join Date: Mar 2007
Location: Orland Park, IL.
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Ron,
All 3 switches were out, I now have the pass side working from both sides but not the drivers window. I'm not getting power to the green terminal, I have power to the single top terminal and the 2 below, black and green on mine should be power to the motor correct, getting power to the black This is frustrating
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76 911S What ever happened to "If it ain't broke don't fix it"? "I'm not totally useless, I can be used as a BAD EXAMPLE!"
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08-11-2008, 09:57 AM
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