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700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
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Flickering lights.Views : 949 Replies : 4Users Viewing This Thread : |
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Sep 19th, 2005, 09:05 | #1 |
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Flickering lights.
The lights on my 1990 2.0 740 are flickering in time with the engine revs.
Any ideas please? |
Sep 21st, 2005, 00:56 | #2 |
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Last Online: Apr 10th, 2014 00:01
Join Date: Feb 2002
Location: Tonyrefail
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RE: Flickering lights.
What do you mean by flickering? Do you mean that as the revs fall they get dimmer? First chek that tickover is set right then check alternator output. It seems like the alternator has failed and is no longer charging the battery at tickover which it should. This symptom usually indicates that the regulator is failing probably due to bad wear on the brushes. If this is what seems to be the fault replacing the regulator shopuld bring operation back to normal. All the best, Peter. |
Sep 21st, 2005, 20:13 | #3 |
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RE: Flickering lights.
No, I mean that the interior lights, headlights and even the lights on the radio flicker/ pulse slightly in time with the revs, If I rev the engine it flickers faster.
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Sep 21st, 2005, 20:31 | #4 |
Aye - him again
Last Online: Today 15:30
Join Date: May 2001
Location: HAWICK
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RE: Flickering lights.
Got the Tee-shirt!
Had the same problem some time back with an older Volvo 760 (I think). Follow Peter's advice and work at the alternator. I took the easier line of swapping the alternator with a known working alternator from a breaker. End result was steady light output.
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(Ouch - that's another knuckle ...) VOC 11817 |
Sep 21st, 2005, 21:20 | #5 |
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RE: Flickering lights.
Doh! I haven't checked yet but I was using a length of wood to wedge the clutch slave cylinder in place while I fitted the circlip. I had it wedged next to the alternator, I bet I've knocked off a connector/wire.
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