Electrics: 850: - Dash Failure

blazerk100 · Dec 16th, 2007, 15:40

Hi, can anyone help me, I have complete instrument failure on my 850, the fuse is OK and I can't find any loose conectors, any advise would be more than welcome..many thanks Chris.

Chris_Rogers · Dec 16th, 2007, 18:49

Could you give a little more information.

Year/model/engine.

Instruments only or lights as well?

There are a lot of different dash modules fitted to the 850 series so more info may help.

JIM C · Dec 16th, 2007, 18:53

Hello and welcome to the forums.
Hope you get your dash problem sorted out.

blazerk100 · Dec 16th, 2007, 19:10

Quote:

Originally Posted by Chris_Rogers

Could you give a little more information.

Year/model/engine.

Instruments only or lights as well?

There are a lot of different dash modules fitted to the 850 series so more info may help.

Hi Chris, it's 1995, 850GLT Auto Estate, with the 2.5 engine, everything else works OK, even the sunroof which is on the same fuse as the dash, the whole of the dash falls except the clock which is in the information window, but none of the other information bits work, this happened yesterday, I went to sort it today and it was OK, so I took it for a spin to a friends house, stayed about an hour, came out and it has gone again. Any ideas would be a great help, as I have check all the connections under the dash and they didn't cure it. Many thanks, Chris.

Chris_Rogers · Dec 16th, 2007, 19:26

There are two main types of dash fitted to the 850.

Common to both is:

Permanent live on terminal C:18 Red/ Black wire

Ignition switched live to dash via relay on terminal C:18 Blue / Red wire.

And earth connection on terminal C:17 Black wire.

I'd check these connetions first, there is an internal fuse on the switched live (C:18) terminal so it's possible that if the external connections are OK then is fuse or one of the internal tracks of the instrument cluster is showing an intermittent open circuit.

stusT5 · Dec 16th, 2007, 22:27

chris could the electric part of the igy barrel cause this problem like it does with the abs light

peter9000uk · Dec 17th, 2007, 10:37

Try moving the key in the ignition slightly when the car is running, it may well be a dodgy ignition switch ( the electrical part). Doddle to change and about £37 from Volvo

blazerk100 · Dec 17th, 2007, 17:49

Hi Peter, many thanks for the ignition trick, just tried and it's not that, still think it's a loose contact but at the moment it's cold out there and I can do without the car for a few days. if I can't find the fault does anyone now a good auto electrian in the Romford Essex area that can help,(I'm OK with 70's yanks but get very lost on newer cars), Once again many thanks to all who have tried to help. Chris.

blazerk100 · Dec 23rd, 2007, 15:41

Hi Everyone,
First, Merry christmas and a Happy new year to you all, now back to the dash. there is good news and bad news, first the good, IT'S WORKING, now the bad, it's intermitant, so i can't find wots wrong, ONEST GUv, I NEVER TOUCHED IT. anyway once again, many thanks, and i will keep you posted on any developments in the future, CHRIS.

Dec 16th, 2007, 15:40	#1
blazerk100 New Member Last Online: Mar 19th, 2008 18:34 Join Date: Dec 2007 Location: Rainham	Dash Failure Hi, can anyone help me, I have complete instrument failure on my 850, the fuse is OK and I can't find any loose conectors, any advise would be more than welcome..many thanks Chris.

Dec 16th, 2007, 18:53	#3
JIM C Forum Support Team Last Online: Jul 4th, 2021 16:28 Join Date: Dec 2003 Location: Scotland View Photos By: JIM C	Hello and welcome to the forums. Hope you get your dash problem sorted out. __________________

Dec 16th, 2007, 22:27	#6
stusT5 850 t5 and r owner Last Online: Aug 21st, 2014 07:28 Join Date: May 2007 Location: epsom View Photos By: stusT5	chris could the electric part of the igy barrel cause this problem like it does with the abs light __________________ www.t5d5.org the no nonsense free speech performance volvo site

Dec 16th, 2007, 18:49	#2
Chris_Rogers VOC Member Last Online: Apr 10th, 2017 16:55 Join Date: Jan 1970 Location: South Kent Coast	Could you give a little more information. Year/model/engine. Instruments only or lights as well? There are a lot of different dash modules fitted to the 850 series so more info may help.

Dec 16th, 2007, 19:26	#5
Chris_Rogers VOC Member Last Online: Apr 10th, 2017 16:55 Join Date: Jan 1970 Location: South Kent Coast	There are two main types of dash fitted to the 850. Common to both is: Permanent live on terminal C:18 Red/ Black wire Ignition switched live to dash via relay on terminal C:18 Blue / Red wire. And earth connection on terminal C:17 Black wire. I'd check these connetions first, there is an internal fuse on the switched live (C:18) terminal so it's possible that if the external connections are OK then is fuse or one of the internal tracks of the instrument cluster is showing an intermittent open circuit.

Dec 17th, 2007, 10:37	#7
peter9000uk Member Last Online: May 14th, 2023 08:21 Join Date: Oct 2003 Location: Addlestone	Try moving the key in the ignition slightly when the car is running, it may well be a dodgy ignition switch ( the electrical part). Doddle to change and about £37 from Volvo

Dec 17th, 2007, 17:49	#8
blazerk100 New Member Last Online: Mar 19th, 2008 18:34 Join Date: Dec 2007 Location: Rainham	Hi Peter, many thanks for the ignition trick, just tried and it's not that, still think it's a loose contact but at the moment it's cold out there and I can do without the car for a few days. if I can't find the fault does anyone now a good auto electrian in the Romford Essex area that can help,(I'm OK with 70's yanks but get very lost on newer cars), Once again many thanks to all who have tried to help. Chris.

Dec 23rd, 2007, 15:41	#9
blazerk100 New Member Last Online: Mar 19th, 2008 18:34 Join Date: Dec 2007 Location: Rainham	Hi Everyone, First, Merry christmas and a Happy new year to you all, now back to the dash. there is good news and bad news, first the good, IT'S WORKING, now the bad, it's intermitant, so i can't find wots wrong, ONEST GUv, I NEVER TOUCHED IT. anyway once again, many thanks, and i will keep you posted on any developments in the future, CHRIS.

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