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No bottom row ignition lights on start up 900 1992

posted by  someone claiming to be Tim on  Thu May 9 11:33 CST 2019 [RELATED]

I have a Volvo 940 1992, the problem is the ignition lights do not come on. When I insert the key and turn it to position II nothing but the seat belt warning light and overdrive arrow light come on. Car starts and runs fine. Also upper part of the instrument panel has lights. All the gauges, dimmer, clock, etc...all are fine. Did some reading. People had issues with bad ground connections. Which ones?
I'd like some hints before I remove the dash and go hog wild.
Thanks in advance!







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    No bottom row ignition lights on start up 900 1992

    posted by  maplebones on  Sat May 11 21:05 CST 2019
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    last visit: Thu Oct 23 22:53 CST 2014
    [RELATED]

    Hi Tim,

    The best place to find ground locations used to be at

    http://volvowiringdiagrams.com/volvo/240%20Wiring%20Diagrams/TP32352-1%201993%20240%20Wiring%20Diagrams.pdf

    but I can't access it anymore. Does anyone know what's up with that ?

    You can check your grounds from the connections behind your gauge cluster.

    If you've never had it out you can learn how at Art Benstein's site.

    http://cleanflametrap.com/dash.html

    This is an entire dash removal, but the 5th picture shows how to access the 2 screws on the right side of the box, and then scroll down until you see a clock for the rest of the story. It's not hard to do.

    Let us know when it's out and we'll suggest some things to check.

    Is your speedometer working ?

    Peter








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      No bottom row ignition lights on start up 900 1992

      posted by  someone claiming to be Tim on  Sun May 12 09:59 CST 2019 [RELATED]

      No, my speedometer is not working. It quit long time ago, but all along my bottom dash lights worked fine. I think my speedometer sending unit (on differential) is bad. Need to replace it.








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        No bottom row ignition lights on start up 900 1992

        posted by  spook on  Sun May 12 14:51 CST 2019
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        last visit: Fri Oct 24 08:06 CST 2014
        [RELATED]

        Dear Tim,

        Hope you're well. Speedometer failures on 1991-2 models usually are caused by failed capacitors. Leaks of capacitors' electrolyte damage the circuit board. This damage may not be obvious. Art Benstein is deeply knowledgeable in this realm (and many others).

        A second cause of speedometer failure is corrosion of the wires that take the in-dfferential sensor's signal to the instrument cluster. The wires are exposed to the elements, just at the point where the wires enter the wiring harness connector's housing. Signal sensor wiring failure - if so it is - will be obvious.

        Hope this helps.

        Yours faithfully,

        Spook








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    No bottom row ignition lights on start up 900 1992

    posted by  Amarin on  Sat May 11 14:02 CST 2019
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    last visit: Thu Oct 23 22:42 CST 2014
    [RELATED]

    Need to dismantle instrument panel out and look at group of connectors behind it. The connectors are labelled A to E and L.

    When all gauges are ok means power and ground are good which comes thru D connector (4 wires) along with speedo input from differential. The lower group of lights are also powered thru D connector but grounded individually according to its purpose thru B and C connectors. So check B and C connectors for looseness/corrosion etc.

    If B and C connectors are ok but still no light then you have to check those solder points on the flexible circuit board itself. Location of these points are not shown in circuit diagram. Need to do visual inspection and reflow where necessary. Extra precaution when reflowing those points. Just touch them with soldering iron not more than 1 second to avoid melting the surrounding flexible board.

    Hope these help,
    Amarin.








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    No bottom row ignition lights on start up 900 1992

    posted by  Oleseahorse on  Thu May 9 19:12 CST 2019
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    last visit: Fri Oct 24 11:45 CST 2014
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    Get one of these. Very handy. Lots of 'em on eBay

    https://www.ebay.com/itm/3-1A-USB-Dual-Ports-Car-Cigarette-Lighter-Charger-12V-24V-Digital-LED-Voltmeter/223488431036?hash=item3408f2d3bc:m:m-WBpFY4soMUeqijlI0o-_g:sc:USPSFirstClass!08741!US!-1








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      No bottom row ignition lights on start up 900 1992

      posted by  someone claiming to be Tim on  Fri May 10 07:52 CST 2019 [RELATED]

      How will this help? This is digital voltmeter that runs off of cigarette lighter port.








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        No bottom row ignition lights on start up 900 1992

        posted by  Blindboy on  Fri May 10 12:41 CST 2019
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        last visit: Tue Oct 21 17:56 CST 2014
        [RELATED]

        Clean all grounds...








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          No bottom row ignition lights on start up 900 1992

          posted by  someone claiming to be Tim on  Fri May 10 20:09 CST 2019 [RELATED]

          Can you be a bit more specific? Which ground connectors pertain to dash board ?








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        No bottom row ignition lights on start up 900 1992

        posted by  Oleseahorse on  Fri May 10 10:28 CST 2019
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        last visit: Fri Oct 24 11:45 CST 2014
        [RELATED]

        Although there's probably a few reasons why those indicator lights may not be energized, having first hand knowledge of what the alternator is doing is essential w these old cars and may help w diagnosis.

        Otoh, a search on the BB will yield the diagnostic tools to determine whether your prob is w the alternator or the cluster. My bet is w the cluster

        Good luck. It all makes sense when it's fixed. Plus w that voltmeter you get the two bonus USB ports.

        Marty








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          No bottom row ignition lights on start up 900 1992

          posted by  someone claiming to be Tim on  Fri May 10 20:10 CST 2019 [RELATED]

          Thanks Marty.







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