working on a 98 Bonneville. tail lights and dash lights not working, checked all fuses under dash all good, checked maxifuses on firewall under the hood all good, and replaced two tail lights on back with same lights "1057". still nothing,if any body knows what I should do next please reply ASAP. Thanks
Interior Lights Dimming Circuit Description Pontiac When the park lights are on, battery positive voltage (B+) is applied via CKT 32 (YEL) to the remote dimmer module. The interior dimming switch in the lamp dimmer switch is a variable resistor which applies the dimming input via CKT 44 (DK GRN) to the remote dimmer module. The potentiometer in the lamp dimmer switch cannot provide enough current in order to operate the incandescent lights. The remote dimmer module amplifies the current, applying a variable voltage to the incandescent lights. As the amount of current increases, the lamps become brighter. As the amount of current decreases, the lamps become dimmer.
The radio, heater and A/C control assembly, instrument cluster, and passenger climate control each has a vacuum fluorescent (VF) display. When each module receives an input that the ignition switch is turned to the RUN position, each module activates the VF display at the full intensity. When the park lights are on, the radio receives the dimming level from an input on CKT 8 (GRY). The radio then relays this information to any other modules with VF displays. All modules with VF displays then adjust the dimming level of their VF display in order to match the level of the incandescent lamps.
Park Lamps (Pontiac) Battery positive voltage (B+) is supplied at all times from the IP fuse block PARK LPS/INT LPS fuse 6C to the headlamp switch and lamp control module (LCM) via CKT 240 (ORN). With the headlamp switch in the PARK or the HEAD position, battery positive voltage (B+) is supplied to the front side marker, park/turn, tail, rear side marker, and license lamps via CKT 9 (BRN). When the ignition switch is in the RUN position and the ambient light sensor indicates darkness, the LCM provides battery positive voltage (B+) to the park lamps, regardless of the position of the headlamp switch.
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