I am unsure whether this applies to the earlier models, but it is certainly relevant to 1991 and onwards.
In the fuse-box, at position 23, you will find a slightly odd looking item - it resembles a fuse, but sits a bit proud and has much thinner prongs on it. It's the orange item in this (sorry, rather poor) photo:
You'll also notice that the label on the fuse-box lid that tells you what fuse does what is completely empty for 23. Don't let that make you think what is in that slot is irrelevant - far from it!
One of the tasks in the original Volvo 400 pre-delivery service instructions is to remove the bridge from fuse-box position 20 (which is intentionally empty on our cars) and insert it in position 23.
I have not made a study of exactly how the wiring here works (the Volvo workshop manuals make no other reference to it that I can readily find, and it doesn't really matter) but clearly it is connected with the functions covered by fuses 21 and 22. If you do not have the orange bridge in place in 23, you will find that:
- the clock stops every time the car is turned off;
- the radio does not remember its settings;
- the courtesy lights do not work on opening doors (they work if you switch them on, as does the ignition key light because that is on a separate circuit);
- the glove-box light does not work;
- the instrument panel rheostat (dimmer) does not work;
- most critically, the info centre does not work - it will be illuminated but blank.
If you have these symptoms together, first thing to check is that the bridge at fuse slot 23 is in place - it's a small but vital item!
David
The bridge in fuse position 23
Moderators: jifflemon, coyote1980, Rachel
The bridge in fuse position 23
Current: 1994 480 GT, 1996 460 CD & 1997 440 LE with lots of optional extras & 2007 V50 SE Sport
Previous: Celebration 331 (re-homed with Richard S), Celebration 467 (returned to Martin Mc); Celebration 346 (re-homed with Alan480); Celebration 269 (scrapped abandoned project), Celebration 73 (sold on after 6 years), 1992 ES, 1988 ES - and numerous other non-480 Volvos!
Previous: Celebration 331 (re-homed with Richard S), Celebration 467 (returned to Martin Mc); Celebration 346 (re-homed with Alan480); Celebration 269 (scrapped abandoned project), Celebration 73 (sold on after 6 years), 1992 ES, 1988 ES - and numerous other non-480 Volvos!
Re: The bridge in fuse position 23
Well my courtesy light and key light mysteriously started working the other week, without doing anything, but my info centre has always worked
Current Jobs to do (23/1/22):
Fix Central Locking
Fix drivers side speaker
Annoying Scratching Squeak
Water leaks
Complete Front O/S rebuild
Fix Central Locking
Fix drivers side speaker
Annoying Scratching Squeak
Water leaks
Complete Front O/S rebuild
Re: The bridge in fuse position 23
Not sure whether the early cars had the bridge...be interesting to know if yours has it?
Obviously this is 480 electrics we are talking about, so it's only one possible explanation for electrical madness
David
Obviously this is 480 electrics we are talking about, so it's only one possible explanation for electrical madness
David
Current: 1994 480 GT, 1996 460 CD & 1997 440 LE with lots of optional extras & 2007 V50 SE Sport
Previous: Celebration 331 (re-homed with Richard S), Celebration 467 (returned to Martin Mc); Celebration 346 (re-homed with Alan480); Celebration 269 (scrapped abandoned project), Celebration 73 (sold on after 6 years), 1992 ES, 1988 ES - and numerous other non-480 Volvos!
Previous: Celebration 331 (re-homed with Richard S), Celebration 467 (returned to Martin Mc); Celebration 346 (re-homed with Alan480); Celebration 269 (scrapped abandoned project), Celebration 73 (sold on after 6 years), 1992 ES, 1988 ES - and numerous other non-480 Volvos!
Re: The bridge in fuse position 23
I'm guessing the thinner prongs explains why we couldn't just dump a fuse into that slot too?dcwalker wrote: ↑Sun Nov 08, 2020 7:30 pmI am unsure whether this applies to the earlier models, but it is certainly relevant to 1991 and onwards.
In the fuse-box, at position 23, you will find a slightly odd looking item - it resembles a fuse, but sits a bit proud and has much thinner prongs on it. It's the orange item in this (sorry, rather poor) photo:
You'll also notice that the label on the fuse-box lid that tells you what fuse does what is completely empty for 23. Don't let that make you think what is in that slot is irrelevant - far from it!