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700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
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Instrument repair?Views : 1093 Replies : 9Users Viewing This Thread : |
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Nov 13th, 2021, 21:44 | #1 |
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Instrument repair?
can anyone recommend anyone to repair my intermittent speedo? seen some ads on ebay but seem rather expensive..
Damo |
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Nov 14th, 2021, 10:45 | #2 |
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Does your ABS warning light come on when the sppedo dies?
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Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........ |
Nov 16th, 2021, 00:31 | #3 |
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Nov 16th, 2021, 10:42 | #4 |
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Sounds more like the instrument then Damo or perhaps the connections on the back of the cluster. Worth checking and tightening those first before pulling the speedo apart.
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Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........ |
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Nov 16th, 2021, 18:38 | #5 |
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Good luck!
Hi. I feel your pain. Search out my instrument cluster tales. Finally solved with expensive eBay purchase of replacement cluster. Took 6 months to sort.
Cheers Siadow |
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Nov 19th, 2021, 17:31 | #6 |
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I had this last year… getting the cluster out is an exercise is swearing to get the surround off, but once that’s off it’s fairly plain sailing.
Separate the clear plastic from the white part - carefully remove all the screws and gently pry them apart. If you meet resistance you’ve probably missed a screw. Extract the speedo and examine the solder joints. I didn’t have any blown capacitors but I did find a lot of verdigris on the copper parts. Get in there with plenty of contact cleaner and a toothbrush, toothpick (gently does it, slow and steady wins the race). Put it back together again and hopefully it will all work again. |
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Nov 20th, 2021, 18:25 | #7 |
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When my speedo went intermittent I found that a couple of the capacitors were leaking so all five were replaced but that didn’t cure it. On the advice of my brother who had replaced the capacitors I obtained a fibre glass pencil to clean up the PCB. What finally cured it was individually removing the screws which screw into and through the PCB and cleaning the PCB beneath them with the fibre glass pencil. Much easier than cleaner and toothbrush etc.
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Ian. Since 2005: 1992 Volvo 940 estate 2.0L. Manual. Daily driver and workhorse. |
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Dec 5th, 2021, 19:54 | #8 |
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The speedo on my 940 diesel started misbehaving (or stopped altogether - it was years ago and I can't remember for sure).
At the suggestion of the local garage man who is a former Volvo area service manager, I checked the wiring at the rear of the back axle and found that it was falling to bits where it was joined to the connector of (I assume) the ABS/speed sensor. I remade all the connections, soldering where necessary, and no trouble with the speedo since then. Martin |
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Dec 10th, 2021, 02:52 | #9 |
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Many thanks to all who replied....
So. The whole reason behind this post is that i bought a used st of clocks off ebay a year or two ago so that i had a replacement when i sent mine off.... i thought the new ones MAY cure my stalling problem but it didn't!!! it does not appear to overrun like it used to sometimes but still stalls!! At least i have a speedo that works correctly...ish....no night lights but hope to cure soon... |
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Dec 10th, 2021, 12:19 | #10 | |
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Instrument cluster repair
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