Wiring Diagrams - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Everything Electrical & Electronic Have an electrical problem? Lighting, Alternators, gauges, DIC, HUD, etc? Post it here. Please post Audio problems in the Audio forum, and Engine control problems in the appropriate Mechanical forum for your year.

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Old 03-22-2004, 08:47 PM   #1
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Default Wiring Diagrams

Where could I get wiring diagrams for everything from engine to suspension/seats/HUD, etc???
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Old 03-22-2004, 09:08 PM   #2
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PontiacDad...maybe even FuddyDuddy121
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Old 03-22-2004, 11:51 PM   #3
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Your talking about a whole dealer service manual of wiring diagrams....

www.helm.com
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Old 03-23-2004, 11:44 PM   #4
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Quote:
Originally Posted by fuddyduddy121
Your talking about a whole dealer service manual of wiring diagrams....

www.helm.com
Actually that should be http://www.helminc.com . Our service manual people have that "inc" on the end; the bare-bones helm.com URL belongs to some marketing outfit.

To the original poster: The manual diagrams are organized by circuit functions rather than by area of the car. What are you in need of exactly?
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Old 03-25-2004, 12:05 AM   #5
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It'* actually the same group. Just click on "repair manuals" at the bottom right of www.helm.com
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Old 03-25-2004, 12:20 AM   #6
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I just thought it'd be neat to see how the steering wheel buttons route to the radio, how the radio goes through crossovers, and how that gain control works and whatnot. It'd be neat to know how the displays and computer are hooked up, too, just so i could make modifications and such to interior lighting & instrumentation as well as the sound system (which is the premium one, by the way. LOL...premium for that time, maybe). The rest (coils, lamps, etc.) would be neat to see just outta curiosity (like specifically how it deturmines when a bulb is out, relays, timing, etc.).
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Old 03-25-2004, 12:24 AM   #7
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You are definitely a candidate for the Pontiac/Helm manual....

Look for one on eBay, too!
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Old 03-25-2004, 06:24 PM   #8
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I checked the Helm website, but they dont' have any wiring diagrams available for bonnevilles...
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Old 03-25-2004, 07:35 PM   #9
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pm me your email addy and a list of what you need, I'll see what I have for you.
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Old 03-25-2004, 07:47 PM   #10
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Quote:
I checked the Helm website, but they dont' have any wiring diagrams available for bonnevilles..
Not exactly what the intent was--Helm, Inc is the company that manufactures the Factory Service Manuals (FSM) for many vehicles. They will sell these manuals to the average person off the street (so to speak) but they are a little pricey--I think around $120 a set? Maybe higher?

Keep an eye out on ebay--I've picked up a full set for each of my cars:
96 Bonneville: $45
97 Grand Prix: $40
91 Bronco: $15
76 Datsun 280Z: $80 (yeah, they're a little harder to find)

It may take a while before you see them show up, but it seems like they eventually always do
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