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 No Instrument or Ambient Interior Lights

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TypeRated
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Name : Brad
Location : Missouri
Joined : 2022-12-12
Post Count : 7
Merit : 0

No Instrument or Ambient Interior Lights Empty
PostSubject: No Instrument or Ambient Interior Lights   No Instrument or Ambient Interior Lights EmptyTue Dec 13, 2022 12:05 pm

Trying to sort the last major issue on my new-to-me, cheap 1997 Riviera.

As the title says, I have no instrument or ambient interior lighting anymore. It was all working when I first got the car, but after having the drivers door panel off to install a new exterior door handle, they all quit. The digital odometer, climate control and radio all still dim when the headlights are on, but all lights associated with the dimmer don’t function. It could just be a coincidence, but I also lost the function of the traction control button at the same time.

I did check all the fuses and pulled the headlight switch apart to clean all of the contacts. All seems fine there. I even pulled the door panel back off to make sure no wires were pinched and shorting out.

What should I check next? It’s stumping me.
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Jack the R
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Jack the R


Joined : 2007-01-16
Post Count : 7907
Merit : 103

No Instrument or Ambient Interior Lights Empty
PostSubject: Re: No Instrument or Ambient Interior Lights   No Instrument or Ambient Interior Lights EmptyTue Dec 13, 2022 12:10 pm

I've replaced two headlight switches this year (not on the Riviera). They do die.
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TypeRated
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Name : Brad
Location : Missouri
Joined : 2022-12-12
Post Count : 7
Merit : 0

No Instrument or Ambient Interior Lights Empty
PostSubject: Re: No Instrument or Ambient Interior Lights   No Instrument or Ambient Interior Lights EmptyTue Dec 13, 2022 12:14 pm

True, but all other functions of the headlight switch still work and I’m getting power to the instrument light fuse with the headlights on. Is there another component of the dimmer?
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albertj
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albertj


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Location : Finger Lakes of New York State
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No Instrument or Ambient Interior Lights Empty
PostSubject: Re: No Instrument or Ambient Interior Lights   No Instrument or Ambient Interior Lights EmptyTue Dec 13, 2022 2:14 pm

If you did not disconnect the battery before doing the door work, you may have accidentally shorted something and blown a fuse.

Check the fuses, and check the connector that plugs into the drivers' armrest switch cluster, and the wire bundle that passes thru the doorjamb on the drivers' side (it's probably OK).

Albertj
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TypeRated
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Name : Brad
Location : Missouri
Joined : 2022-12-12
Post Count : 7
Merit : 0

No Instrument or Ambient Interior Lights Empty
PostSubject: Re: No Instrument or Ambient Interior Lights   No Instrument or Ambient Interior Lights EmptyTue Dec 13, 2022 3:26 pm

No, I didn’t disconnect the battery. I’ve checked all 3 fuse boxes, all the fuses, and the wiring/connections in the door panel. Everything seems fine.
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Jack the R
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Jack the R


Joined : 2007-01-16
Post Count : 7907
Merit : 103

No Instrument or Ambient Interior Lights Empty
PostSubject: Re: No Instrument or Ambient Interior Lights   No Instrument or Ambient Interior Lights EmptyTue Dec 13, 2022 8:26 pm

TypeRated wrote:
True, but all other functions of the headlight switch still work

It seems to me that the entire switch wouldn't fail at once. It didn't happen that way with my other two vehicles - some functions worked, some didn't.
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EyeDoc1
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Name : Christen
Location : Vancouver, WA
Joined : 2016-03-30
Post Count : 122
Merit : 5

No Instrument or Ambient Interior Lights Empty
PostSubject: And double check the rheostat as well   No Instrument or Ambient Interior Lights EmptyWed Dec 14, 2022 7:40 pm

I just had the same issue when I took apart the steering column to replace the ignition switch.  Meaning I also disconnected the headlights long flat green clip harness as well as the blue clip at the traction control.  In the daytime, the controls were bright, as indicated by the strong LED of the HVAC controls as well as the radio display.  However, at night, same dim appearance of everything mentioned above by Brad.  However, I did NOT have the headlight switch nor the blue, call it traction control/trip reset harness connected. Once I got everything put back together, life's good.  Wondering if it has something to do with the harness connecting the headlight switch.  Also, check to see that the rheostat isn't turned all the way down.  As me how I know about that little fashion faux pax.
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TypeRated
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Name : Brad
Location : Missouri
Joined : 2022-12-12
Post Count : 7
Merit : 0

No Instrument or Ambient Interior Lights Empty
PostSubject: Re: No Instrument or Ambient Interior Lights   No Instrument or Ambient Interior Lights EmptySat Dec 17, 2022 8:18 pm

Well, I finally found the issue. The dimmer on the headlight switch controls a rheostat that’s mounted under the dash on the steering column. The rheostat just happened to go bad. I temporarily bypassed it (a mini fuse works perfectly) and now have dash lights. They’re full bright, but certainly better than nothing.

No Instrument or Ambient Interior Lights 421b9910
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Jack the R
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Jack the R


Joined : 2007-01-16
Post Count : 7907
Merit : 103

No Instrument or Ambient Interior Lights Empty
PostSubject: Re: No Instrument or Ambient Interior Lights   No Instrument or Ambient Interior Lights EmptyThu Dec 22, 2022 12:37 am

I'm surprised the rheostat is separate from the light switch.
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No Instrument or Ambient Interior Lights Empty
PostSubject: Re: No Instrument or Ambient Interior Lights   No Instrument or Ambient Interior Lights Empty

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