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#1
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1970 GTO underhood harness routing
Still piecing together my 1970 GTO. As documented many times before, I got it as a stripped wreck with the front clip missing; the wire harnesses had been cut. I purchased new American Autowire harnesses, but I don't know the routing. I'm hoping someone out there has some clear pictures so I know where to run & clip things. Any photos appreciated!
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#2
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I don't have photos of a factory harness but do have an assembly manual. Are you looking for firewall to engine, or firewall to rad support (or both)?
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Michael 1970 Oshawa built 1 option Judge. 24 year restoration/upgrade project finally finished! 1979 Trans Am - low-buck drag car project for when I retire |
#3
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Both.
I have the assembly manual myself, but its a bit fuzzy hard to read....that's why I was looking for pictures! |
#4
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See if these are any clearer than yours.
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Michael 1970 Oshawa built 1 option Judge. 24 year restoration/upgrade project finally finished! 1979 Trans Am - low-buck drag car project for when I retire Last edited by mrennie; 11-04-2021 at 09:37 PM. |
#5
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Chapter 12 in the 70 Service Manual has many pics of wiring routing.
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
#6
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Check these out.
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Michael 1970 Oshawa built 1 option Judge. 24 year restoration/upgrade project finally finished! 1979 Trans Am - low-buck drag car project for when I retire |
#7
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Those drawings are way better than mine! I bought a copy of the assembly manual off Kijiji & think it was a set of photocopies...it's really hard to read.
Thanks!! |
#8
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I had one of the crappier manuals as well when I started. Pretty much useless.
Inline Tube has since been selling a higher quality version which is what these pics are from. The pages are blue instead of white.
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Michael 1970 Oshawa built 1 option Judge. 24 year restoration/upgrade project finally finished! 1979 Trans Am - low-buck drag car project for when I retire |
#9
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Oh to have a nice assembly manual....said the guy with a '64! Lol
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#10
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Back under the hood....
The replacement harness has 2 ground locations, One is a smaller connector, takes a sheetmetal screw. From what I could see (looking on the inter-web) it attaches to the body right by the fender mount on the firewall. Lo & behold my car had a hole there, so I assume this is correct? Second ground is a much larger connection for a 3/8" bolt. I assume this grounds to the cylinder head or engine block? |
#11
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I'm going by memory so $0.02...
The larger eyelet goes on the back of the driver side head, and the smaller one goes under one if the screws that hold down the horn relay.
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Michael 1970 Oshawa built 1 option Judge. 24 year restoration/upgrade project finally finished! 1979 Trans Am - low-buck drag car project for when I retire |
#12
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Great, thanks!
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