Turn Signal Switch Replacement
Short answer: A turn signal that won’t self-cancel usually needs the turn-signal switch (cam + harness) inside the column. You don’t have to remove the column, but you do dismantle the top to get the harness plug out — you’ll need a steering-wheel puller and a hub/lock-plate puller.
- Which switch: 1967–68 columns used either Delco (white) or Boyne (blue/red) switches. Tell them apart by the hazard-knob hole — Delco is a “D”-shaped hole, Boyne is round. The Delco is still available in a superseded form with a later (post-1969) pigtail plus an adapter for the pre-1969 connector.
- Install tip: cut the old harness ~1/2″ from the connector, tie a string to it as a pull line, feed the new harness through (bend the connector 90° to pass the hole, then straighten and plug into the adapter). Straight columns are easy; tilts are harder. Practice on a 1967/68 donor column — not 1969 (totally different) — and watch the three little springs once the “C” clip is off.
- Quality warning: some “service replacement” Delco switches are inferior orange-plastic units with a cheap snap action — seek the better white-backed version (members report good Delco replacements with the flat 1969-style connector + a half-moon adapter pigtail).
- Note: a switch that won’t cancel isn’t always bad — the internal cam alignment may just be off (re-clock the wheel a tooth and re-center via toe adjustment at alignment).
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Content last modified: June 13, 2026 at 10:06 am
← Frequently Asked Questions
Replacing the switch on my 69 Firebird. The article helps but can you give some details about the three little springs that can get lost? Also were you able to get the part numbers for the AC Delco Switch that are the same quality as the originals? Thanks so much!!!
I am also in need of a turn signal switch for my 67 Firebird with a TILT wheel. I know it’s white with the “D” so I believe it’s a Delco. The best part number I can come up with is the D6211 but I cannot confirm this. Does anybody know for certain what the part number should be ?
Thanks