No Power to Fuel Pump, ? relay fine, no clicking noise under hood

[LRDisco97US]

Not getting any power to the fuel pump,replaced the pump, usually theres a clicking noise accompanying ignition mode I, im not hearing the clicking noise, any suggestions ? not getting any sort of startup when power to the starter

relays arent stuck, inertia switch isnt stuck,

[pazzo rover]

Did you check the fuel pump fuse? In the fuse box, under the bonnet passenger side #6. Do you hear the Main Relay click with the ignition on?

[LRDisco97US]

i dont hear any noise from the pump, theres usually a slight ticking noise before ignition, i cant hear the relay from inside the cab.

[Disco 1]

I have seen the alarm system kill power to the fuel pump. Try locking and unlocking the truck with the fob a few times (or whatever the proper reset sequence is, maybe someone else will chime in) and then see if it works.

[LRDisco97US]

never needed the key fob, i do not own one. when in ignition II is on, could the fuel / coolant sensor prevent startup ?

[JPSpen]

No, but the immobilizer or Spider can... Cold solder joints on the pcb can cause an interruption in the multi function relay circuit.. Keeps the fuel pump from coming on...

At least that's what it did on mine.. But mine was actually immobilized I think..
Worked the next day...I reconnected the battery with the hood switch hooked up . A no no...

If you take the cover off the multi function relay. you can manually actuate relay in the fuel pump circuit and see if the pump runs.. If it does, That pretty much means the immobilizer....

John

[John C]

Originally Posted by JPSpen

I reconnected the battery with the hood switch hooked up . A no no...

Sorry John, but what do you mean by hooked up? Just curious

Thx

[LRDisco97US]

mines a 1997 AEL unit, with no spider unit,

[John C]

Ok, did you check the fuse under the hood?

How about the Multifunction relay in the engine compartment?

Have you checked the connectors on the ECU?

Everybody likes to blame the crank sensor, have you checked yours?

[LRDisco97US]

replaced fuel /coolant sensor, fuel pump relay, cannot get it to start with starting fluid, but cranks with ignition.

[LRDisco97US]

the starter initiates, i noticed i cant seem to turn off the high beam on the light switch, not getting power to the fuel pump, replaced the pump and battery, theres usually a slight subtle ticking/tapping noise before ignition thats under the hood before ignition, now thats gone, replaced closed fuel loop and coolant sensor. still no startup, just cranks. any suggestions ?


OBD II reader says Fail, cannot get it to connect. when i turn the lights on, i cant shut off the high beam either.
replaced the battery, now i have a new chime when i turn the key ? what is going on with this truck ?

[kennar]

I had the ground wire for the pump burn out the pin connect at the plug for the fuel pump. found it after I replaced the pump.