TM   10-3930-643-20 ENGINE, FUEL, EXHAUST AND COOLING TROUBLESHOOTING AND MAINTENANCE. 4-4. Fuel   STE/ICE   Tests. b. TEST  25  - FUEL  RETURN  PRESSURE. 1. 2. 3. 4. 5. 6. Refer  to  VTM-General  Setup  and  Checkout  Instructions  in  M  9-4910- 571-12&P. Connect   power   cables   to   battery,   as   shown. Disconnect   fuel   return   line   at   fuel   tank   as   illustrated.      Clean   line. Refer   to   Chapter   2. Install   tee   TK   24   and   install   blue   transducer.      Connect   line.      Connect cable   to   transducer. Perform   test   using   procedure   Test   50   as   instructed   in   TM   9-4910-571-12&P. Pressure   should   not   exceed   a   maximum   of   2   psi. Return   vehicle   to   its   original   condition. 4-15