Download Connect gauge between fuel pipe and fuel distribution manifold, use hose 5116 and nipple 5265, Plug open end of hose with 5266. Turn gauge cock to position 1, pointing toward hose 5116. B13 Check Function Of Fuel Pump And Tank Pump Pressure sensor is located next to expansion tank in engine compartment. Disconnect connector from sensor. Turn on ignition. Connect wire (in connector) from relay to ground. (Note: both wires are yellow/black, check which one is ground). Fuel pumps should start and be clearly heard. B14 Check Tank Pump Unscrew fuel filler cap and listen. It is also possible to connect an ammeter between the fuse and pump wiring. 740 1985-on: fuse 11 760 up to 1987: fuse 11 760 1988/89: fuse 11/30 Current consumption: 1-2 A. If neither pump operates: Turn off ignition.