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Renault Laguna - Battery/Engine issue
johnfarquhar74
Posts: 466 Forumite
in Motoring
Query for the knowledgable types that reside here!
I have an '05 plate, 2.0L petrol Laguna. Last March the battery died so I replaced it, thinking 4 years for a battery 'aint too bad.
Last week the new battery failed, the place where I bought the battery reluctantly replaced it under warranty as the original had totally lost it's capacity to hold a charge.
On connecting the new battery, I noticed a spark when I connected one of the grounds so I whipped out my multimeter and noticed a constant draw of current on one of the -ve's. There are 2 -ve's connected to the battery pole, 1 grounds the car, the 2nd, with a 0.5amp draw, runs down to the bottom of the engine block. It is a thick cable and is paired with a thick cable from the +ve terminal.
What would these cables be for, is it the starter/solenoid or something else. They completely bypass the fuse box as I had pondered pulling fuses to see what could be drawing a charge from the battery.
Something I will test when it is light, is to put my meter back in series on the thick cable and close the bonnet/lock the car to see if the current draw ceases after a period of time, as I've read here that some modern cars shut down gradually after you press the 'lock' button on the remote.
If there is a constant load, does anyone have a rough idea what it may be, by my calculations the battery will collapse within a few days at this rate!
I have an '05 plate, 2.0L petrol Laguna. Last March the battery died so I replaced it, thinking 4 years for a battery 'aint too bad.
Last week the new battery failed, the place where I bought the battery reluctantly replaced it under warranty as the original had totally lost it's capacity to hold a charge.
On connecting the new battery, I noticed a spark when I connected one of the grounds so I whipped out my multimeter and noticed a constant draw of current on one of the -ve's. There are 2 -ve's connected to the battery pole, 1 grounds the car, the 2nd, with a 0.5amp draw, runs down to the bottom of the engine block. It is a thick cable and is paired with a thick cable from the +ve terminal.
What would these cables be for, is it the starter/solenoid or something else. They completely bypass the fuse box as I had pondered pulling fuses to see what could be drawing a charge from the battery.
Something I will test when it is light, is to put my meter back in series on the thick cable and close the bonnet/lock the car to see if the current draw ceases after a period of time, as I've read here that some modern cars shut down gradually after you press the 'lock' button on the remote.
If there is a constant load, does anyone have a rough idea what it may be, by my calculations the battery will collapse within a few days at this rate!
0
Comments
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It will always draw something, alarm sensors, radio code storage etc. This is why you have to re-enter your Stereo PIN Code after you have disconnected the battery.0
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Some ECUs will also draw power. More likely to be radio, clock, alarm, central locking from plipper etc.The man without a signature.0
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