Having problems with your 1989 GMC K1500 ?
Turn signals and hazard flasher does not work
Check to see if you have power going to the switch with a test light. Also do the turn signal lights light up on the dash as you lift the arm up or push it down. If so you have a bad flasher which will located under the dash towards the firewall.
Repair Help & Product Troubleshooting for 1989 GMC K1500
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