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What causes the turn signal lights to not flash on a 1970 Chevy truck?
Wiki User
∙ 15y ago
Either a burned out lamp or a bad flasher relay.
If the lamps all work (turn on the lights and walk around the truck) then the next thing to do is locate the flasher, which is a small can-shaped device about two inches long and one inch in diameter, usually located under the dash. (You may have to cut a wire tie if it's bundled tightly in a wiring harness. It should be easy to locate because it's the only relay you'll find there.
(Some vehicles have their fuses located under a panel in the glove compartment, and the flasher may be in there too. I'm guessing that on a "Chebby" P/U it's under the dash)
The flasher relay may be made of aluminum or plastic (black or green) and the three prong plug pulls off (or you may have to pry it off with a screwdriver tip) and the replacement relay can be easily installed after a quick trip to a nearby auto supply outlet. Replacements are not expensive, probably costing less than five dollars.
Make sure you get the plug on tight and tuck it up so it's not hanging down where people can hit it with their feet. If you have a tie-wrap or electrical tape you may want to use it to secure the new flasher under the dash.
Wiki User
∙ 15y ago
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