Interior (map) lights turn on when doors are opened, but not with buttons.

Car? 360? Spider? Modena? Spotlight and dome light not working?

 

Spotlight and dome light not working? (sorry, I edited my last message to ask this)

 

I thought the spotlight was only supposed to work with the button?

The door system and the button system use the same power source, so it's not a power issue. The problem must be within the light assembly. i.e. a faulty switch or broken wire.

Is the clock working?

 

I'm not 100% sure if the light assembly internal wiring. It may look something like this:

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If both lamps are not working, it suggests an earth issue. i.e. one of the black wires going to pin 4 of the main connector. The door switches provide separate earths to turn on the light/s (see brown wire).

When you turn on your headlights, do the dome and spot pushbuttons illuminate? This is the circuit I'm not sure of. The switch backlighting may come on with the key or with the external lights.

 

I mean the switch backlights (logos).

 

Either way, it sounds like a light assembly issue.

If my diagram is correct, if there is a broken earth wire on pin 4 (of the main plug) causing both lights not to work when manually selected, both lights should still work when the both lights are selected on and a door is opened.
i.e. if there is a break in this black wire (see arrow) .

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The tan (?) wire should be the earth (ground) signal from the doors. The yellow wire looks like key power (for switch backlighting), but I haven't done any wiring checks on the lamp assembly to confirm this. It may only be powered with the external lights turned on. The red wire should be 12 volts (live/permanent battery power).

This would be easily checked with a multimeter.

There should be tutorial somewhere on the forum on how to remove the light assembly.

 

Did the backlight come on with the key on... or only with the sidelights/headlights? This would be a clue.

Interesting. I didn't know about the key and engine running logic (I presume this is normal). I know the Immobiliser controls the fading function (as it does on my F355), but why this should be affected with the ignition key, I don't know.

Did you try selecting the dome light on, then seeing if the spot light comes on automatically (with the doors)? If this doesn't work, I can only assume that the diagram is wrong. You would need two faults to inhibit spotlight manual and auto operation:

1) a broken earth and a broken dome light switch or
2) a broken spotlight switch and a broken dome light switch

Having said that, the soldering on that light doesn't look too good.

Also, I assumed the backlighting used an LED, not an incandescent bulb. If you do decide to buy a new lamp assembly and assuming the the old one is not repairable, can I offer to buy your broken one from you? Not for fixing, but for wiring checks (for posterity).

In the meantime could you do some voltage/continuity checks? Is the black wire connected to chassis earth? Is the yellow wire key power?

 

I would manually jump the switch settings with a wire to confirm it isn't poor contact or a broken connector on the switch.

 

Maybe the contacts are corroded?

Do these switches mechanically lock in (for lights on)?

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Looking at the photo, I can almost figure out what's going on:
The backlight has no internal switching. It's hardwired to the yellow (power) and black (permanent earth/ground). I just have to figure out when power appears (key on or lights on).
The manual switching of the dome light is done on the earth side (top left hand corner of the photo)
The spot has no auto function (unless there is some contact I'm not seeing in the spot switch)

Does the spot switch jumper these contacts (as well as the red and black wires).

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(see green link)

Maybe it's linked via the shiny copper bar which appears to run from the dome switch to the spot switch? Or is that just a spring which provides tension on the buttons?

 

How does the spot switch provide a link from the bulb to permanent earth?

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The slider switch should have some sort of contact on the underside of it that jumps the connector runs. These sealed units are throwaway garbage as it's hard to take the switch out to clean the contacts. If a replacement is cheap, I'd consider this the life expectancy. Or try what this guy did: https://www.ferrarichat.com/forum/threads/dome-light-switches-inop.600414/

 

I've updated my wiring graphic to show incandescent backlighting (non-LED), but I'm still not sure of the switch contacts...

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I've also rearranged the bulb order to match the lamp assembly internals on the car.
With this wiring setup, with loss of an earth on pin 4 (black wire), the Spotlight could still get an earth from the door-activated system (brown wire), but only if the dome light switch was pushed.

Of course it is possible that Jay has two issues. He just didn't notice that they broke at different times.