Wiring problems are number two on the list of most common reasons for safety sensors acting up.  It can be an easy fix.  But if you make a mistake, your easy repair can turn into a frustrating nightmare.

Before you tinkering with the wiring, you should first confirm that the safety sensors are in fact the source of your problems with a simple test.  Just follow the steps to override your safety sensors, if it works you know its the eyes. If you have done that, and also ruled out misalignment, it is time to look at the wiring.

There are a few things to be aware of that can affect how you trouble shoot and repair bad wiring.  This guide will cover:

• Types of wire
• Wiring configurations
  • Home Run
  • Daisey Chain
• Troubleshooting Tests
• Common problems
  • Loose wire at the opener terminal
  • Bad splice
    • Finding the splice
    • Checking the splice
  • Broken wire
  • Damaged wire
• How to fix it right
  • Proper connectors
  • The right way to twist wires together
  • Attaching to the opener
  • Best practices
• Dealing with specific opener brands
  • LiftMaster/Chamberlain/Craftsman
  • Genie/Overhead Door
  • Linear
  • Marantec

I recommend that you read a little bit about the brand of garage door opener you are working on before you get in too deep.  There are quirks with each brand that can throw you off if you aren’t aware of them (especially the Chamberlain brands).