MustangWorks.com : Ford Forums - View Single Post - electrical issues with fuel pump and relay circuit

tmoss · 10-30-2003, 08:26 AM

Sounds like the EEC is working correctly. When you turn the key on, power gets applied to critical engine componants through the EEC power relay - that is how power gets to the Red/Black wire. That same EEC relay power goes into pin #37 on the EEC to let it know to prime the pump. The EEC turns the fuel pump relay on for a second or two by grounding the Tan/Light Green wire going to the EEC through pin #22. Sounds like all this is happening, so your problem must be at the relay power contacts (Orange/Light Blue from fuse link OR Pink/Black wire to pump), the inertia switch or the pump.

10-30-2003, 08:26 AM	#3
tmoss Registered Member Join Date: Mar 2003 Location: Saint Louis, MO Posts: 634	Sounds like the EEC is working correctly. When you turn the key on, power gets applied to critical engine componants through the EEC power relay - that is how power gets to the Red/Black wire. That same EEC relay power goes into pin #37 on the EEC to let it know to prime the pump. The EEC turns the fuel pump relay on for a second or two by grounding the Tan/Light Green wire going to the EEC through pin #22. Sounds like all this is happening, so your problem must be at the relay power contacts (Orange/Light Blue from fuse link OR Pink/Black wire to pump), the inertia switch or the pump. __________________ Tom (Torque) Moss 88Gt 5spd Vert, FLowmaster Catbacks, stock cam advanced 4° @ 108.5° ICL, NMRA prepped GT40P heads 1.85/1.55 valves and 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake (ported lower), TB and injectors. 277RWHP/330RWTQ (SAE). http://www.fastlanecars.com/