L78 Back-up Light Harness Routing

[James W.]

I am trying to determine the correct back-up light switch wiring harness routing at the firewall where the harness connects together with the main wiring harness pig tail. I've got two different picture of two 1965 Corvettes that are less than 100 serial numbers apart both in the 22,xxx range. One is an L78 equipped car and the other an L79 equipped car. Which routing configuration is correct or are they both wrong?

Also the back-up light wiring harness metal "J" hook harness clip located on the driver's side transmission tunnel is missing. Are there any Corvette parts vendors that carry this clip?


Thanks,

James West

[Wayne M.]

Re: L78 Back-up Light Harness Routing

James --- Routing should be per UPC Z06, sheet 1; ie. from the firewall up and thru the plastic tie strap on the engine harness then down thru the clip, etc.....

The trans tunnel ciip is used in several locations, and maybe the repop catalogs show it for these other places: see UPC M20, sheet 4; UPC 12 ; sheet C3 (3-speed trans = standard). [I believe b.u. sw. harness uses same clip as speedo cable in this base trans configuration].

But I'm intrigued that, in your photos, both these late '65s show the main (under dash) harness wires as black insulation with pink or green stripes. I thought these changed to solid pink and solid green somewhat earlier in production.