Turn Signal CAM?

Tiny
TWEBB101
  • MEMBER
  • 1984 CHEVROLET TRUCK
  • 7.4L
  • V8
  • 2WD
  • AUTOMATIC
  • 172,000 MILES
The right blinker would cancel out when turning the wheel, but the left wouldn't. I pulled the column apart to replace the turn signal canceling cam, and when I put mine all back together, now neither blinker is canceling. The turn signal cam is working, where the blinkers/hazards, etc, all work fine, but they won't cancel out. It's like the cancel cam, with the two knobs and horn button holder, is just spinning in there but not touching the cancel springs to push on them. Any ideas? I have an '84 C20, but the column is marked for an '86 Blazer (it was replaced before I got the truck).
Sunday, June 29th, 2025 AT 1:18 PM

5 Replies

Tiny
KEN L
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Yep, it is the turn signal switch that is bad, if you look the cancelling tabs are broken off.
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Monday, June 30th, 2025 AT 11:07 AM
Tiny
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Thanks Ken, but I've put a new one in, and it doesn't work still.
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Monday, June 30th, 2025 AT 11:36 AM
Tiny
KEN L
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There is only the cam and the switch so one must not be working. Do you have the correct switch and is it mounted correctly?
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Monday, June 30th, 2025 AT 3:26 PM
Tiny
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Hi Ken, upon further inspection, the new one wasn't molded correctly, so it didn't allow the springs to do the spring things. I put the original one back in (it was just missing a spring), and it was letting the springs work as they should. A very minor difference, but enough to make it not work. Everything is working now; sorry to bother you guys!
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Monday, June 30th, 2025 AT 7:01 PM
Tiny
KEN L
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You are never a bother, we are here to help :) 2CarPros anytime
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Tuesday, July 1st, 2025 AT 6:14 PM

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