getting frustrated

[equalXlength]

i will check my fusible links, but i have another question.
green solenoid-fuel pump

 

[holyford86]

well if the eec relay is bad it would cause the fuel pumps to not run, reverse the relays and see if you get the relay to click then.

 

[equalXlength]

green solenoid-fuel pump
brown solenoid-eec
black solenoid-???? and should i have 12 volts here because i dont

 

[Flat Toy]

I have had the following happen to me, Replaced fuel pump relay and truck ran well. The next time I tried it would not start. Found that the wires had come loose inside the the plastic plug and when the relay was installed, instead of slipping over the pins on the relay the pins tried to push them out of the plug. They made contact for awhile then vibration caused them to separate.
When I install a relay now I tack a small punch and push on the wires from the back side of the plug and insure that they push onto the pins of the relay. Might not be the problem but takes only a min. to check and does not cost anything.

 

[equalXlength]

thank you i will try that.

 

[equalXlength]

I have no spark, what could cause this. I have replaced the tfi and i still get nothing. if i can get spark and bypass the fuel pump relay i think it should run???

 

[shadetree]

Heres how it works:

Ignition on - 12vdc thru rd/lt grn wire to EEC relay energizing relay coil.

Coil energizes closing EEC relay contacts sending 12vdc from yellow wire thru red wire to wiring junction sending voltage to fuel pump relay, and several sensors and part of computer.

The yellow wires to the EEC relay and the fuel pump relay come from the terminal on the starter fender relay thru fuse links. Each relay is on a separate link, so check voltage from all links.

The computer senses voltage, and temporarily grounds pin 22 of the computer thru tan/lt grn wire. This energizes the fuel pump relay coil closing relay contacts sending 12vdc to the inertia switch thru or/lt blu wire and also pin 94 of the computer.

After a couple of seconds, the computer releases pin 22 shutting off the fuel pump relay, then waits for ignition pulses from the TFI module.

When the starter is engaged and the TFI module starts sending ignition pulses, the computer then re-grounds pin 22 closing the fuel pump relay supplying gasoline for engine start.

To test the pump, ground the tan/lt grn wire going to pin 22. With the ignition switch turned on, the pump will run as long as the jumper is in place.

If the pump starts, relays are good as is all wiring and fuses. If the pump doesn't start, you can diagnose back and see where the problem lies.shady

I have no spark, what could cause this. I have replaced the tfi and i still get nothing. if i can get spark and bypass the fuel pump relay i think it should run???

One thing at a time. You are jumping all over the place replacing parts.
Check the EEC relay circuit. EEC stands for electronic engine control. This relay operates the computer. If the computer is not working, you are not going to have any spark or fuel output.

Use a test light, or meter and check the voltage path outlined in my post above.shady

 

[equalXlength]

thank you ill post my results. you are alot of help

 

[equalXlength]

coil wire shorted and messed everything up, its now up and running. thanks everyone for your help.