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Stereo Lighting Half Out

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70
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WhatAmIDoing
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Stereo Lighting Half Out

Post by WhatAmIDoing »

So quick story, I was driving the other day hauling skis. I had to slam on the breaks, resulting in the skis flying forward and slamming into the stereo. Everything seemed good. Last night I went out for a drive, turned my lights on, and noticed the entire right side of the stereo and climate control illumination was out. Hit it in a few places and got the climate control to light back up, but most of the stereo is still out (pic).

I believe the lighting went out once before, hit a bump and it came back on. So I'm assuming there is a loose connection somewhere. Tried to do a search for this, but all I turned up was replacing bulbs. I don't think I killed the bulbs in the incident, but maybe. I find it curios that power on the left and right sides would be separate. I have not pulled the stereo yet, as I was unsure of how temperamental the anti-theft system was. Any tips on where to hit it :lol: or what to look for?
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rspi
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Post by rspi »

New bulbs.
'95 855 T-5R M, Panther - 22/28 mpg, 546,000 miles
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scot850
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Post by scot850 »

Somewhere on MVS there is a how-to on replacing the bulbs. One may have been dislodged or have a broken filament. Might as well replace the lot while in there. The tricky one is the one for the LCD display as it requires soldering if I recall and having to desolder the display to access the bulb. That one is working so no worries.

Neil.
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WhatAmIDoing
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Post by WhatAmIDoing »

Alright, new bulbs it is. Anyone got a source for those? Guess I'll also do the aux jack mod while I'm at it.
'98 S70 T5M - 323,000mi - awaiting heart transplant :shock:
'98 V70 T5M - 324,000mi - my new project
'99 S70 "AWD" - 220,000+mi - gone :cry:
Knows enough to be dangerous :wink:
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DeathRex
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Post by DeathRex »

You might have cracked the circuit board, or broken a couple of bulbs. There are 3 - 2.2Ohm resistors that supply power to 1 or 2 bulbs each. The resistor on the upper right got burnt up. Best to check the bulbs with a multimeter, should be under 20 ohms each.
You'll have to check the back of the PCB to see if you have a cracked circuit board. It can be fixed, but it isn't that easy.
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Post by rspi »

'95 855 T-5R M, Panther - 22/28 mpg, 546,000 miles
'95 955 T-5R Yellow Wagon, Lemonade, 180,000 miles
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos
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rspi
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Post by rspi »

Bulbs: https://www.swedishcarparts.com/parts/1 ... only-t3040
'95 855 T-5R M, Panther - 22/28 mpg, 546,000 miles
'95 955 T-5R Yellow Wagon, Lemonade, 180,000 miles
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos
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Post by rspi »

'95 855 T-5R M, Panther - 22/28 mpg, 546,000 miles
'95 955 T-5R Yellow Wagon, Lemonade, 180,000 miles
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos
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wizechatmgr
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Post by wizechatmgr »

It's a very easy repair unless the board cracked. If it did, I would suggest running jumper wires to allow for flex in that area again...
Wisdom requires knowledge as a prerequisite, but knowledge can be developed due to a lack of wisdom.
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD 2.4 T -- ~231k miles
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cn90
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Post by cn90 »

The DIY below has Radio Shack bulb info.
Since Radio Shack is closed, you can find equivalent on ebay, just buy a pack of 10 bulbs on ebay for cheap:

viewtopic.php?t=7132&start=70

IIRC, then these are T1 bulbs 12V 50 mA type.

Check Amazon review:

https://www.amazon.com/dp/B00L8BR76A
2004 V70 2.5T 100K+
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