Question about 1998 Pontiac Bonneville
The instrument panel lights work sometimes and will then stop working for no reason. I was told by one mechanic that there may be a sensor behind the front bumper somewhere that will cause them to periodically go out. Maybe a daytime headlight issue? It definitely isn't a fuse because like I said they do randomly come on. Hot and cold weather doesn't sem to have any effect. Im looking for solutions without having to crack the dashboard open and hunt down an electrical gremlin. Thank you for any help!
Daytime headlight issue ? No , no sensor behind the front bumper . No Daytime time head lamp issue , doesn't turn on the instrument panel light's . This is more then likely a remote dimmer module problem .
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.
Posted on May 16, 2017
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Posted on Jan 02, 2017
SOURCE: i fixed problem with multi
Hi and welcome to FixYa!
As a first course of action I strongly suggest that you check the PCM (powertrain control module). The PCM has connectivity on all electrical current that runs inside the car including the engine, transmission, interior accessories, exterior lights, etc.
If the PCM is faulty something will surely fail. Have it checked and replace if necessary.
Hope this helps and thank you for using FixYa! Have a good one!
Posted on Dec 08, 2010
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