General: - erratic rev counter - Page 2

usb · Jan 23rd, 2017, 17:45

Did you resolve this?

I've not seen a Volvo driving the tacho from the Alternator but its not uncommon on older diesel vehicles in general.

The alternator brushes will not be the issue but where an entire alternator has been changed on a car with bad brushes - and that alternator has a pickup to drive the tacho - obviously, this can cause the tacho to start working again.

anchovy · Jan 24th, 2017, 02:38

no as prev. the rev counter works for a minute or two most days then dies.

Jan 24th, 2017, 02:38	#12
anchovy Junior Member Last Online: May 12th, 2017 01:47 Join Date: Feb 2016 Location: latitude 19 south	erratic rev counter no as prev. the rev counter works for a minute or two most days then dies.

Jan 23rd, 2017, 17:45	#11
usb New Member Last Online: Aug 1st, 2017 20:34 Join Date: Dec 2016 Location: south	Did you resolve this? I've not seen a Volvo driving the tacho from the Alternator but its not uncommon on older diesel vehicles in general. The alternator brushes will not be the issue but where an entire alternator has been changed on a car with bad brushes - and that alternator has a pickup to drive the tacho - obviously, this can cause the tacho to start working again.

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