Thread: S40: - Fuel Gauge not working
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Old May 16th, 2019, 23:42   #3
Wayne Perry
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Last Online: May 17th, 2019 00:20
Join Date: Apr 2019
Location: Port Alberni
Default 04 Volvo S40 1.9 lt Fuel Guage

Low warning light always goes off after start up, Fuel guage works mabye 50 %
of the time.

I have replaced fuel pump assembly, Same problem,

Does the low warning light and fuel guage get their voltage from the same wire? I have inspected the instrument cluster and wiring,,, All look good

Is there a relay that supplies voltage ?

Is it possible the relay has bad points?
I have been trying to find a wiring diagram but no luck,

Any help would be appreciated

Wayne
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