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Author Topic: underhood wire harness extension  (Read 2520 times)
Petes L48
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« Reply #15 on: March 15, 2011, 12:59:35 PM »

Checked my 11B LOS w/ PB and all original wiring today and it has the extension.  There's an additional tan brake switch wire on the extension.  I always thought this was a "normal" harness setup.
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Ron C.
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« Reply #16 on: March 16, 2011, 05:17:49 AM »

I wonder why or what was the reason for the extension? Maybe Jerry knows?
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67Z/28,67RSZ/28,69RSZ28,71SS454CHEVELLE,02Z4C35thSSCAMAROGMMG#11PERF EDITION 500HP
Jon Mello
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« Reply #17 on: March 16, 2011, 12:36:32 PM »

Ron,

That reason for that extension has never been figured out, that I know of. Did the Factory Fit people give you a part number for that extension harness. Would be nice to know that info.

Thanks,
-Jon
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Jon Mello
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Ron C.
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« Reply #18 on: March 16, 2011, 07:10:28 PM »

Hi Jon, no Don just said they did not list it but if you call him he will have the number for you.  I am thinking that the extension has something to do with assembly, maybe at the time the harness was added after the extension was installed and the brake booster and master and all the lines were installed it would be easyer to attach the engine harness to the extension rather than directly into the fuse box which would be hard to see and reach.I cant even get my hand down in there with everything in the way but if the extension was there it would be very easy to attach it to the engine harness. Just my opinion. Grin
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67Z/28,67RSZ/28,69RSZ28,71SS454CHEVELLE,02Z4C35thSSCAMAROGMMG#11PERF EDITION 500HP
68crossram
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« Reply #19 on: March 17, 2011, 07:57:10 PM »

I have one on my LA built 67 Camaro. They were an extension (as many have suggested). They were only used on LA built cars. It was to make it easy for the production line workers as they didn't need to lean over as far, one end was already plugged into the firewall. If you ask for Don Bock at Factory fit he might remember making one up for my 67 Pacer. Or send him your and he'll duplicate it. Correct the harness isn't needed but looks cool to those that look that hard.
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Ron C.
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« Reply #20 on: March 22, 2011, 12:42:16 PM »

Recieved the extension from factory fit,if anyone needs this extension the part number for factory fit is CA71392.
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67Z/28,67RSZ/28,69RSZ28,71SS454CHEVELLE,02Z4C35thSSCAMAROGMMG#11PERF EDITION 500HP
rat pack
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« Reply #21 on: March 24, 2011, 08:23:49 AM »

This was "supposed" to be an LA plant item only for cars with power brakes, but I have found it on two NOR cars with power brakes. The original GM part number is 6291392. I had talked to Tom at M&H back in the early 90's about this harness and he told me that cars with power brakes really need this to make routing the harness easier. He confirmed that GM showed it to be an LOS item only, but like me he has seen it on NOR built cars also, and all had power brakes....................RatPack.........................
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Mark
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« Reply #22 on: March 24, 2011, 10:51:57 AM »

Is this now, or was it originally a 6 cylinder car?
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Mark C.
1969 Indy Pace Car
350/300HP RPO Z11
Ed Bertrand
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« Reply #23 on: March 24, 2011, 11:09:33 AM »

Well, going by the 67 AIM (UPC J50, sheet A4), it does say "Los Angeles plant only", but why wouldn't the Norwood plant need this as well???

Ed
« Last Edit: March 24, 2011, 12:35:33 PM by bertfam » Logged
Ron C.
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« Reply #24 on: March 24, 2011, 12:31:04 PM »

I have this on my norwood 67Z28 also.Its not just a LA car thing.I am sure it a power disc/drum item that was needed to make it easyer to attach with the brake booster and master installed.
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67Z/28,67RSZ/28,69RSZ28,71SS454CHEVELLE,02Z4C35thSSCAMAROGMMG#11PERF EDITION 500HP
rat pack
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« Reply #25 on: March 24, 2011, 02:16:47 PM »

Mark, funny you asked about a 6-cylinder as it made me go to the garage and pull out an original harness from a 6cyl w/o power brakes and it has the extension. When I restored the car we converted it to a small block and I didn't use the extension during the restoration..................RatPack..................
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Mark
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« Reply #26 on: March 24, 2011, 02:43:40 PM »

The engine harness on a 6 cylinder needs to be longer to reach the distributor, coil  and possibly the oil pressure switch.
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Mark C.
1969 Indy Pace Car
350/300HP RPO Z11
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