Grid Filament Test
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 Dodge Intrepid, 2003 Chrysler Intrepid, 2003 Chrysler Concorde, 2003 Chrysler 300M, and 2002 Dodge Intrepid. However, it is still accessible from the selected car via links, so may be relevant.
- Turn engine off. Using a DVOM, connect negative lead to ground. Connect positive lead to bus bar ground "B" terminal. See Figure . Turn ignition and control switch to ON position. If voltage is less than one volt, go to next step. If voltage is one volt or more, go to step 3 .
- Connect negative lead of voltmeter to bus bar ground "B" terminal. Connect positive lead of voltmeter to bus bar voltage feed "A" terminal. Voltmeter reading should be 10-14 volts. A lower voltage reading indicates a poor ground connection or an open grid filament. Check and repair ground connections as necessary. If ground connections are okay, go to next step.
- Connect negative lead of voltmeter to bus bar ground "B" terminal and touch each grid line at midpoint "C" with positive lead. A reading of about 6 volts indicates line is good. A reading of zero volts indicates a break in line between midpoint "C" and bus bar voltage feed "A" terminal. A reading of 10-14 volts indicates a break in line between midpoint "C" and bus bar ground "B" terminal. Move probe toward bus bar voltage feed "A" terminal or bus bar ground "B" terminal. Voltage will change when break is crossed. Repair grid line(s) as necessary. See GRID FILAMENT REPAIR under ON-VEHICLE SERVICE.