Question about 1984 Volvo 240 Series
Posted by thumpr321 on Jun 23, 2008
Iv'e replaced my alternater yesterday for the 4th time in 4yrs. Is this really just a " Volvo problem" if not, whats the likely cause. I remove and charge my Battery 2 times daily to get to work and home. otherwise i'll need a jump.
Comment by thumpr321, posted on Jun 25, 2008 thanks for feedback however I just checked and there's no alternater light. does this mean complete dash removal? I've had the car 4yrs and don't remember ever seeing one. please explain
in simplest steps to follow.
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Best Solution posted on Jun 23, 2008
Rating: 89%, 109 votes
When you place key into the ignition and turn to "on" position, do you see your alt. light come on? If not, this is the cause of the charging problem. The current has to flow through this light and back to battery to complete the circuit.
Thank you for rating this solution.
Down the side of the Engine where the Alternator is there should be a few wires.
1 goes to the oil pressure sensor
Another few wires go to the Alternator there are 2 circuits one is for charging which is a little thicker which is bolted under a nut & a few smaller wires which do 2 things.There is a low current circuit that applies 12v to one side of the battery lamp on the dash & when the enging is running this 12v is on the lamp & the 12v from the battery is on the other side so the lamp is out .
If the alternater isn't turning 0 volts is coming from the alternator & the Battery lamp is on.
These smaller diameter wires are important for the monitoring & charging the battery.
If you can't get the battery lamp & other monitoring lamps on the dash to illuminate when turning the key around to run not start your going to have battery charging problems.
I suggest you check the black plastic insulation carring these wires in them may be cracked or broken.
I own a few 240 series volvo's & I think I have had just about every electrical problem possible.
Posted on Jul 22, 2008
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Posted on Jan 02, 2017
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