Fuel pump relay

[castrolgreen]

I believe my ecm is not sending a signal to the fuel pump relay is there anyway to bypass that and perhaps wire another trigger wire?? Thanks

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[RmvBfrFlght]

To do this need to supply +12 volts to the relay, this is what the ECM does. To pin A on the relay, or A1 at the ECM (GRN/WHT).

If this turns on the relay while the ECM won't, it is a small transistor on the lower board in the ECM that is likely bad. Easy to replace.

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[hiboom]

there's a green wire on the driver side mines about midway to the valve cover behind the alternator you can use a hot wire to turn on the fuel pump. to see if it's working.I believe when you turn on the key the ecm sends signal for about four seconds to prime the system then shuts off until it gets a rpm signal of about 600 rpm i thing and turns back on the fuel pump someone please correct me if i'm wrong

 

[castrolgreen]

Everything went just like U said my friend so what now???how do I replace????

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[castrolgreen]

Hoe do I know which transistor it Is?

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[RmvBfrFlght]

Decent links:

http://www.turbobuick.com/forums/th...il-oil-psi-reaches-15-20.341905/#post-2726082

http://www.turbobuick.com/forums/th...tion-mystery-wires.393519/page-2#post-3219445

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[castrolgreen]

Ok mines looks pretty burnt toast could I just replace it & it should be ok or should I worry about the board being toast because it looks little burnt thanks in advance

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[RmvBfrFlght]

If the board is just a little discolored it is OK. If it is showing the fiberglass mat then it would be best to get another ECM.

A picture would help.

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