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The Terminator
How-To
Return style wiring HOW TO allowing OE type fuel pump actuation
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<blockquote data-quote="MalcolmV8" data-source="post: 11445157" data-attributes="member: 8854"><p><span style="color: Red"><span style="font-size: 18px">SOLUTION:</span></span></p><p>OK when I first wired up my pumps return style my thought process was to remove the FPDM from the equation as it's no longer needed. Instead I took the DG/YE wire (pin 9) as everyone suggested and used it to power my relay. The downside of course is the pumps run continuously when the key is on regardless of engine running.</p><p></p><p>The signal wire from the ECC is the WH/R at the FPDM side (pin 1). It provides the correct times for the pumps to be on such as prime and then off when motor is off. It alone however is to weak to drive a relay.</p><p></p><p>So the solution is as simple as using the FPDM output that would normally drive a fuel pump to drive your relay. Use pin 10 & pin 3 to wire your relay. This way the ECC still tells the FPDM when the pumps should be turned on and the FPDM in turn activates your relay.</p><p></p><p>Pin 10 = BN/PK (normally fuel pump positive)</p><p>Pin 3 = RD/BK (normally fuel pump negative)</p><p></p><p>Note: you must use pin 3 to ground the relay coil (trigger) and not chassis ground or it does not work.</p><p></p><p>There you go guys!!</p><p>Malcolm</p></blockquote><p></p>
[QUOTE="MalcolmV8, post: 11445157, member: 8854"] [COLOR="Red"][SIZE="5"]SOLUTION:[/SIZE][/COLOR] OK when I first wired up my pumps return style my thought process was to remove the FPDM from the equation as it's no longer needed. Instead I took the DG/YE wire (pin 9) as everyone suggested and used it to power my relay. The downside of course is the pumps run continuously when the key is on regardless of engine running. The signal wire from the ECC is the WH/R at the FPDM side (pin 1). It provides the correct times for the pumps to be on such as prime and then off when motor is off. It alone however is to weak to drive a relay. So the solution is as simple as using the FPDM output that would normally drive a fuel pump to drive your relay. Use pin 10 & pin 3 to wire your relay. This way the ECC still tells the FPDM when the pumps should be turned on and the FPDM in turn activates your relay. Pin 10 = BN/PK (normally fuel pump positive) Pin 3 = RD/BK (normally fuel pump negative) Note: you must use pin 3 to ground the relay coil (trigger) and not chassis ground or it does not work. There you go guys!! Malcolm [/QUOTE]
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How-To
Return style wiring HOW TO allowing OE type fuel pump actuation
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