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1984 928 Fuel pump not run

Fuel System

Vehicle Information: Year: 1984; Engine (size, modifications): V8; Total Mileage: 65000; Transmission type: Manual;

The fuel pump will not run during start up. I have tried to jump the relay and I'm only getting power on one side of the jumper wire with a test light. I have replaced the fuel pump relay with a new relay and the car worked fine for a period and started back with the same issue. I had to bring power to the fuel pump by wiring a shut off switch into the harness bypassing the relay. I checked the No.13 fuse and it is ok> Plug X, red looks ok. What could you recommend? Should I replace the Electronic ignition and L-Jetronic relay? Now the headlights go on and off sometimes but I could hear the Headlight relay clicking. I think it is bad that why the lights work sometime??

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