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Message: <blockquote data-quote="jarance" data-source="post: 391589" data-attributes="member: 21">I am not about e30 but I think the E30 should be the same..Just remove the rear seat. Under the seat there should be 2 oval covers. One on the right and the other on the left.Open the oval cover (4 screws) on the driver side and you be able to see the fuel pump and the fuel sender.there should be two cables (connectors) to the pump. One of them is for the pump and the other for the fuel sender. If I am not mistaken the connector are black and the other is white.Check the resistance with an ohm meter for both connectors. the fuel sender should have a resistance of about 10 ohms to about 800 ohms (depend on much fuel in the tank). The motor resistance should be lower in value. if one of the connector is having open circuit (high value), then the cable or the resistance thread is worn out.</blockquote>