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oil temp changing when switching on lights

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oil temp changing when switching on lights

Hi guys,

noticed a problem today with the digital oil temp (in the 83 gti). It normally reads around 98, but when i put my headlights on, the temp jumps up by 18 degrees. If i then dim the green dash lights, the temp falls by 6 degrees.

It just occurs to me now, but it hasnt been driven in a while (3/4 weeks) and was pretty sluggish starting, so maybe low battery power related? I went for a good long drive, so hopefully that should have toppped up the battery. Touch wood.

cheers

Black MK1 GTI Campaign SOLD
Blue T5 GP 2010 Transporter (Van)
Orange M6L 2012 Brompton (Bike)
Neversummer 2012 Revolver (Snowboard)

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I've got the same problem.
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