Fuel pump not turing on. Has power , no ground.  No ground out of relay. Can jump at relay plug to get pump on. Any ideas what to check?

car has ground to the pump or at the relay. Can start pump by jumping relay plug. Motor has fire to the plugs

has no ground

alarm?

alarm?

or immobiliser?

 

car has ground to the pump or at the relay. Can start pump by jumping relay plug. Motor has fire to the plugs

has no ground

car has ground to the pump or at the relay. Can start pump by jumping relay plug. Motor has fire to the plugs

has no ground

Sorry, I can't figure out what you're saying.

On the Esprit:

The relay provides power to the pump.

The pump should be grounded at the pump end (depending on what type of engine you have).

You jumped the relay and the pump worked, so the pump side of things should be ok.

The relay needs power and a ground for the coil to operate. You jumped the relay plug and the pump worked, so you know you have power to the relay. However, you seem to contradict yourself regarding the relay ground/earth:

"No ground out(?) of relay"

"car has ground to the pump or at the relay"

Does the relay coil have continuity?

Edited August 3, 201410 yr by Qavion

Check for loose/corroded terminals at two fuel pump relay bases, and an  inertia switch (easy check for continuity with VOM or light)

 

Then, and only then,

check an  overboost relay/switch and Engine Overspeed Module (best to borrow a "good" one or new).

 

Study the diagram on page 65, section LF of your Service Notes, it is all there.

Edited August 4, 201410 yr by MrDangerUS