1996 850r Instrument panel stays on when key is out

Post by **BEJinFbk** » 30 Jun 2023, 17:07

If the lights were dim and brightened when you turned the key,
that sounds kind of like a sticky relay contact to me. I'm surprised
that no other systems were affected, though.
Relays 105, 106 and 107 are identical, making it pretty easy to pull
and swap them to isolate and see if the problem follows a relay.
You may want to mark them before you get started.
.

96 850 Relay Locations.pdf: (167.81 KiB) Downloaded 59 times

Texasbrainstew · Post by **Texasbrainstew** » 30 Jun 2023, 21:57

I FOUND THE FUSE

Its fuse #3 !!! (When connected keeps my dash warning lights on with the key out)

I can start the car 100% and have all of the normal behavior from the cars lights with the fuse completely out.

When I turm off the car behavior is normal as well.

So weird! "Courtesy lamp control signal, CAT converter overheating warning, speed warning"

Im desperate to find the schematics for this circuit.

ALSO I already tried pulling both overload relays with no luck at all. Lights still on with key out. EXCEPT when fuse #3 is pulled

*update: my key fob works fine now too. Now that fuse #3 is pulled.*

Any thoughts???

Post by **abscate** » 01 Jul 2023, 04:24

1996 electrical diagrams are not hosted here by agreement with Volvo, but links are findable by search

Post by **BEJinFbk** » 01 Jul 2023, 13:42

You're looking for Technical Publication:
TP3911202 850 1996 Wiring Diagrams

Texasbrainstew · Post by **Texasbrainstew** » 29 Aug 2023, 07:06

Well well well. Seems like it was only temporary.

With that same fuse pulled, my cluster is on again when I pull the key out.

Texasbrainstew · Post by **Texasbrainstew** » 29 Aug 2023, 07:35

The original fuse I pulled was #3 courtesy lights

When I pulled the fuse #2 for the fuel pump the lights turned off. Any suggestions?

Post by **scot850** » 29 Aug 2023, 08:13

Shorts under the main fuse box. Wires may be perished and shorting under there.

Neil.

Post by **abscate** » 29 Aug 2023, 08:38

Each time you play with a fuse you are moving wires with shorts or opens. Tough to logic troubleshoot,you have to get down and dirty and inspect the wiring , including the stuff under the tape wrap

Post by **foggydogg** » 29 Aug 2023, 09:26

You could be chasing a ground issue too.
And that cluster of wires going under the relay container is a known sore spot, my early 850 did really goofy stuff when that mess got cruddy.

1996 850r Instrument panel stays on when key is out

Re: 1996 850r Instrument panel stays on when key is out