2400 Troubleshoot Defroster Test Lamp

Description

How to use the defroster test lamp

With the Frost Fighter test lamp it is easy to troubleshoot and find defroster and demister damage. All testing should be done with the defroster on.

Defroster testing is easy and the repair is easier!

Defroster circuit testing. Connect the alligator clip to the tab on the defroster and place the test lamps black wire lead on the other tabs metal base. The test lamp should glow brightly. If the lamp does not glow, the vehicle’s defroster circuit is faulty and should be checked for shorts, blown fuse or damaged relay.

Testing defroster tabs. Clip the red lead directly to the defroster tab then place the black lead directly on the defroster next to the tab. The lamp should glow brightly. If not, the tab is not making a good connection to the defroster. Remove the tab and re-attach it with the Frost Fighter Tab Bonding kit.

Defroster grids. The smallest break or crack in the grid can cause the defroster to fail so careful visual inspection is needed. When moving the rounded no scratch lead along the defroster grid when you encounter a break in the grid you will see the lamp flicker or go out as you pass over it. Mark the damaged area with tape. Repair damaged defroster grids with the Frost Fighter Grid Repair Kit.