Anybody know what this is for ?

[SS Tim]

How does REF ACC FEED sound to everyone? What wiring diagrams did you use the generics or the 71 service manual's?

[69gmcc10]

Originally Posted by SS Tim

How does REF ACC FEED sound to everyone? What wiring diagrams did you use the generics or the 71 service manual's?

Tim, what is the REF ACC FEED?

[SS Tim]

Originally Posted by 71K20chevy

My '71 has the same wire as well, I posed a topic on the forum quite some time ago and I think we all came to the conclusion it was for the TCS. Like said above, it's usually thrown away as it is just emission crap that makes the truck run poorly when it is not warmed up, if I recall.

While there is a TCS in many 71 applications it is too easy to dismiss any wire as smog related. If there is a wire question it needs to be identified against an applicable schematic. In this case it would be very easy to trace it back to the connector cavity to confirm.

Originally Posted by 69gmcc10

Tim, what is the REF ACC FEED?

Actually I had not noticed it before nor seen if referenced. From the description it is an underhood igniton voltage reference power connector for testing that can also be used for an underhood accessory feed.