interior light issues....HELP
 

Not a single interior light works on my 92' SVX.

No overhead, maps, doors, floors or instrument panel, nada!

However, all other accessories work fine: mirrors, lapbelts, clock, stereo....


What can be the common factor be that effects all interior lighting?????

Re: interior light issues....HELP
 

Check the two ground connections under the passenger seat, on the raised section alongside of the ABS control unit, and fastened with a single screw.

Re: interior light issues....HELP
 

hi ive seen this at my shop ,all of these run through the light timer ,connector b91 r/s a piller ,both times the plugs were loose ,very comman subaru problem ,b91 is a 20 pin black connector
you have to remove the glove box and lightly pull out on the dash to reach this
charlie

Re: interior light issues....HELP
 

Check the fuses.

Re: interior light issues....HELP
 

Even the instrument panel goes through the timer?

Check fuse #25 in the main box..... it supplies both the courtesy lights and the time control unit. Its the 4th blade fuse down on the left side, engine compartment box.

Re: interior light issues....HELP
 

Thanks for the info, I will post my findings.

Re: interior light issues....HELP
 

ok, not a fuse.

Looking for the b91 plug. Only black plug I can find is on the P/S floor, not a 20 pin. Have a picture by chance?

Thanks

Re: interior light issues....HELP
 

hi ill see if i can copy it from the wiring book

Re: interior light issues....HELP
 

Found the TCU, not the problem!

Re: interior light issues....HELP
 

I do not see any confirmation that this has been checked. Based on logic this is a very possible fault. ;)

Re: interior light issues....HELP
 

There's also a ground wire that runs under the centre console. I'm not sure what it grounds but worth a check.
When you remove the centre console it's aft of the shifter

Re: interior light issues....HELP
 

hi well since you found the unit you might as well make sure you have all the power there ,since there is 2 plugs there ,b91 red wire pin 3 12v from fuse 9,pin 7 blue/white 12v fuse 3,b90 red/white pin9 fuse 15 ,blue/red pin2 fuse 25,by the book the ground is the same as door locks ,turn signals and you dont have problems with them ,all the rest is in the bulk head wiring harness so i dont think theres another plug un done
good luck ,ill keep looking

Re: interior light issues....HELP
 

This is next, I just didn't want to pull the chair/carpet if I didn't have to.

I did forget to mention that I lost one by one. First the spot/room lights went, then the floor lights, then RS door, a finally LS door and instrument panel. THis was about a two year process. Strange that power windows, sunroof, radio, seatbelts, locks and climate control still work.

Would the timer control unit go bad?

Re: interior light issues....HELP
 

If as you now advise the lights ceased to operate “one by one. First the spot/room lights went, then the floor lights, then RS door, a finally LS door and instrument panel. THis was about a two year process.” There is but one common denominator, bulbs and the life of same. ;)

Re: interior light issues....HELP
 

I haven't checked all of the bulbs, but I did replace the door bulbs with no luck.

The fuses look good, but I am going to put a meter on them.

Thanks