cranks but no start

1995 FORD TAURUS
124,000 MILES • 6 CYL • FWD • AUTOMATIC
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BOBBY LANCASTER
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i have a 1995 taurus gl 3.0l /eec, cranks but no start
i have spark, no fuel pressure. checked inertia switch not tripped. checked pink and black wire going to inertia sw. should have 12v but does not. checked fuel pump fuse ok. checked yellow power wire going to pcm got 12v. checked pink and black wire coming out of pcm nothing, are you suppose to get 12v at pink and black wire or 5vref. wiring diagram from mitchell does not show fuel pump relay. how can i check fuel pump relay? i need to check pink and black wire for continuity from pcm to fuel pump. can you send me good wiring schematic.
Feb 13, 2011 at 4:43 PM
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DOCFIXIT
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12v from PCM to inertia switch then to pump . Does not use relay so looks like PCM at fault
Feb 13, 2011 at 8:16 PM
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BOBBY LANCASTER
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the constant control module incorpates the fuel pump relay but fuel pump does not use the fuel pump relay to energize. and is that hot at all times 12v at the pink and black wire out of the pcm?
Feb 13, 2011 at 10:30 PM
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DOCFIXIT
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Maybe CCRM see diagram see if PCM is grounding relay on #22
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Feb 14, 2011 at 2:58 PM
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BOBBY LANCASTER
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i here the relay click when i turn the key on.. does that mean that it is grounded throught the pcm.?
Feb 14, 2011 at 4:47 PM
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DOCFIXIT
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Ckick could be from other relays is ground onpin #22? does black/pink get hot from CCRM?
Feb 14, 2011 at 7:35 PM
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BOBBY LANCASTER
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can i just back probe #22 from +B to #22 to see if #22 is grounding the fuel pump relay, with the key on? and if it is and im not getting 12v on pink and black wire. dose that mean the PCM is bad?
Feb 14, 2011 at 11:54 PM
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BOBBY LANCASTER
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#22 does get grounded. key to on position momentarily comes on relay clicks and then light goes out. No 12v at pink and black wire at pcm that goes to ccrm and to innertia sw to fuel pump.
Feb 15, 2011 at 11:40 AM
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DOCFIXIT
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Disconnect inertia switch jumper power to pump does car start and run?
Feb 15, 2011 at 4:31 PM
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BOBBY LANCASTER
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you mean bypass the inertia sw and connect the 2 wires together and see if car starts?
Feb 15, 2011 at 5:00 PM
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DOCFIXIT
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No remove switch direct power pump
Feb 15, 2011 at 5:52 PM
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BOBBY LANCASTER
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i replaced fuel [pump
Feb 15, 2011 at 6:19 PM
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BOBBY LANCASTER
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i put 12v to the pump at the inertia sw would not start.
Feb 16, 2011 at 12:54 AM
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BOBBY LANCASTER
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docfixit why arn't you responding.
Feb 16, 2011 at 10:44 PM
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DOCFIXIT
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Is voltage getting to pump? is pump ground good? do you have a DVOM? Why replace pump? does old pump run in bench test?
Feb 17, 2011 at 4:10 PM
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BOBBY LANCASTER
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take tank down and check wiring at the tank. If fuel pump relay feeds the pump, I should check #5 at ccrm to pump.
Feb 17, 2011 at 7:55 PM
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BOBBY LANCASTER
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I replaced pump before i talked to you. yes I have DVOM and I'll check + Batt and grd. at pump connection.
Feb 17, 2011 at 7:59 PM
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BOBBY LANCASTER
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according to mitchell schematic,fuel pump ground is located at left front door sill. but to see if that grd. is good i hook test lite up from + batt. to fuel pump connection grd. wire, and and test feed wire from chassy grd..
Feb 17, 2011 at 8:47 PM
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BOBBY LANCASTER
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i had bad connection at pump, that was my fault the plug has no retainer clip so i tie rapped it. and bypassed inertia sw car started, wirers at inertia sw are corroded. thanks for your help.
Feb 18, 2011 at 3:15 AM
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DOCFIXIT
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Way to go glad to hear you got it sloved. Cars sure can be a pain sometimes
Feb 19, 2011 at 4:35 PM
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