Section 13-01: Instrument Cluster, Conventional
1996 F-150, F-250, F-350, Bronco, F-Super Duty Motorhome Chassis Workshop Manual
DESCRIPTION AND OPERATION

Charge Indication System

With the key in START or RUN, the battery voltage gauge measures the vehicle's voltage to indicate the battery state of charge.

 

Battery Voltage Gauge

The battery voltage gauge is a gauge which measures the voltage potential at the battery to indicate the battery state of charge. The magnetic gauge consists of three primary coils, one of which is wound at a 90-degree angle to the other two. The coils form a magnetic field that varies in direction according to the vehicle's voltage.

A primary magnet, to which a shaft and pointer are attached, rotates to align to this primary field, resulting in pointer position. The bobbin/coil assembly is pressed into a metal housing that has two holes for dial mounting. There is no maintenance required for this gauge.

 

Charging System Warning

With the key in START or RUN, battery voltage is present at the charge indicator. If the generator (GEN) (10346) is not generating power, the voltage regulator inside the generator grounds the charge indicator through Circuit 904 (LG/R). The charge indicator illuminates.

When the generator is generating power, the voltage regulator inside the generator applies battery voltage to the charge indicator through Circuit 904 (LG/R). With battery voltage present at both ends of the charge indicator, there is no current flow and the charge indicator does not illuminate.